Papers - TSUDA Hiroyuki

Multi-band photonic integrated wavelength selective switch

Kraemer R., Nakamura F., Hout M.V.D., Van Der Heide S., Okonkwo C., Tsuda H., Napoli A., Calabretta N.

Journal of Lightwave Technology (Journal of Lightwave Technology)  39 ( 19 ) 6023 - 6032 2021.10

ISSN  07338724

　View Summary

As fiber-optic systems turn toward multi-band transmission (MBT), exploiting the complete low loss window of optical fibers, novel optical components, able to operate in bands other than the conventional C-band, become necessary. In light of this, we report on a multi-band photonic integrated 1 × 2 wavelength selective switch (WSS) operating in the O, S, C and L-bands. The photonic integrated WSS presented in this work uses a folded arrayed-waveguide grating (AWG) as the filtering element, while the wideband operation of the thermo-optic switches allows the routing of the individual channels from those bands to any of the device output ports. The operation of the WSS is experimentally validated for different bands and modulation formats. Results show error-free operation with limited penalty with intensity-modulation direct-detection (IM/DD) non-return-to-zero on-off keying (NRZ-OOK) up to 35 Gb/s in O, S, C and L-bands and up to 169.83 Gb/s with coherent 64-quadrature amplitude modulation (QAM) data transmission in the S, C and L-bands.

• Access to Document (DOI)

Impact of cascaded multi-band 1×2 photonic integrated WSS in metro-access networks

Kraemer R., van den Hout M., van der Heide S., Santana H., Wang Y., Nakamura F., Tsuda H., Napoli A., Okonkwo C., Calabretta N.

Optics InfoBase Conference Papers (Optics InfoBase Conference Papers)   2021

　View Summary

PIC multi-band WSS is evaluated with 33.3 GBd 64-QAM data. BER values below the FEC-limit for the S, C and L-bands are obtained. The 3dB bandwidth scaling of cascading WSSs is also investigated for a metro-access network.

Guanine crystals regulated by chitin-based honeycomb frameworks for tunable structural colors of sapphirinid copepod, Sapphirina nigromaculata

Kimura T., Takasaki M., Hatai R., Nagai Y., Uematsu K., Oaki Y., Osada M., Tsuda H., Ishigure T., Toyofuku T., Shimode S., Imai H.

Scientific Reports (Scientific Reports)  10 ( 1 )  2020.12

　View Summary

© 2020, The Author(s). Sapphirinid copepods, which are marine zooplankton, exhibit tunable structural colors originating from a layered structure of guanine crystal plates. In the present study, the coloring portion of adult male of a sapphirinid copepod, Sapphirina nigromaculata, under the dorsal body surface was characterized to clarify the regulation and actuation mechanism of the layered guanine crystals for spectral control. The coloring portions are separated into small domains 70–100 µm wide consisting of an ordered array of stacked hexagonal plates ~1.5 µm wide and ~80 nm thick. We found the presence of chitin-based honeycomb frameworks that are composed of flat compartments regulating the guanine crystal plates. The structural color is deduced to be tuned from blue to achromatic via yellow and purple by changing the interplate distance according to vital observation and optical simulation using a photonic array model. The framework structures are essential for the organization and actuation of the particular photonic arrays for the exhibition of the tunable structural color.

• Access to Document (DOI)

S-, C- And L-Band Photonic Integrated Wavelength Selective Switch

Kraemer R., Nakamura F., Tsuda H., Napoli A., Calabretta

2020 European Conference on Optical Communications, ECOC 2020 (2020 European Conference on Optical Communications, ECOC 2020)   2020.12

ISSN  9781728173610

　View Summary

A photonic integrated WSS operating on the S-, C- and L-Band is presented with an average extinction-ratio of -20.40 dB. Crosstalk levels were kept below -20 dB for all bands and experimental results on NRZ OOK data indicate error-free operation for up to 35 Gb/s.

• Access to Document (DOI)

Silicon photonics platforms for optical communication systems, outlook on future developments

Tsuda H.

IEICE Electronics Express (IEICE Electronics Express)  17 ( 22 ) 1 - 7 2020.11

ISSN  13492543

　View Summary

This paper reviews recent progress in silicon photonics and compares it with other optical device platforms. The key components for optical communication systems, including arrayed waveguide gratings, optical switches, modulators and optical functional devices fabricated on silicon photonics platforms are explained. The integration of III-V compounds, lithium niobate, polymers, phase change and other functional materials are necessary to strengthen silicon photonics platforms. These are also reviewed, and the feasibilities are discussed. Finally, I express my personal view as to the best research direction for silicon photonics.

• Access to Document (DOI)

High extinction ratio and low crosstalk C and L-Band photonic integrated wavelength selective switching

Kraemer R.M.G., Nakamura F., Wang Y., Tsuda H., Calabretta N.

International Conference on Transparent Optical Networks (International Conference on Transparent Optical Networks)  2020-July 2020.07

ISSN  9781728184234

　View Summary

A photonic integrated 1×2 Wavelength Selective Switch (WSS) based on a loopback configuration is shown to operate on the C and L-Bands due to the cyclic nature of the employed arrayed-waveguide gratings (AWGs). An average of -22.59 dB and -20.40 dB were observed in the C and L-band channels respectively. Crosstalk levels are kept below -40 dB on the output port A and below -30 dB on output port B. Experimental results on NRZ OOK data indicate a bit-error-rate (BER) below 1×10-11 with very limited penalty at both bands up to a bit rate of 30 Gbps.

• Access to Document (DOI)

Silicon Based 1 × M Wavelength Selective Switch Using Arrayed Waveguide Gratings with Fold-Back Waveguides

Nakamura F., Asakura H., Suzuki K., Tanizawa K., Ohtsuka M., Yokoyama N., Matsumaro K., Seki M., Ikeda K., Namiki S., Kawashima H., Tsuda H.

Journal of Lightwave Technology (Journal of Lightwave Technology)  39 ( 8 ) 2413 - 2420 2020.04

ISSN  07338724

　View Summary

The design of a novel 1 × M fold-back type wavelength selective switch (WSS), which has fewer waveguide crossings than a conventional integrated WSS, is reported. The WSS is composed of interleavers, 1 × M optical switches, and arrayed waveguide gratings (AWGs). Switches are combined with AWGs by fold-back waveguides, and each AWG works as both a demultiplexer and multiplexer thus avoiding center wavelength mismatch caused by fabrication errors. Waveguide crossings cause excess crosstalk and loss in lightwave circuits. By using a fold-back architecture the number of crossings can be reduced to less than half that of a conventional design. We discuss the operating principle, the design method, and the scalability of the fold-back type WSS. Furthermore, the switching operation of a 200-GHz spacing, 20-channel, 1 × 2 silicon WSS in a fold-back configuration on a 5 mm × 10 mm SOI chip is demonstrated. This has 15 waveguide crossings in a path, of which six are additional crossings with monitor waveguides. The average insertion loss and average extinction ratio are 29.6 dB and 10.9 dB, respectively.

• Access to Document (DOI)

SDN enabled flexible optical data center network with dynamic bandwidth allocation based on photonic integrated wavelength selective switch

Xue X., Nakamura F., Prifti K., Pan B., Yan F., Wang F., Guo X., Tsuda H., Calabretta N.

Optics Express (Optics Express)  28 ( 6 ) 8949 - 8958 2020.03

　View Summary

© 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement Optical switching techniques featuring the fast and large capacity have the potential to enable low latency and high throughput optical data center networks (DCN) to afford the rapid increasing of traffic-boosted applications. Flexibility of the DCN is of key importance to provide adaptive and dynamic bandwidth to handle the variable traffic patterns generated by the heterogeneous applications while optimizing the network resources. Aiming at providing the flexible bandwidth for optical DCNs, we propose and experimentally investigate a software-defined networking (SDN) enabled reconfigurable optical DCN architecture based on novel optical top of rack (OToR) switch exploiting photonic-integrated wavelength selective switch. Experimental results show that the optical bandwidth per link can be automatically reallocated under the management of the deployed SDN control plane according to the variable traffic patterns. With respect to the network with inflexible interconnections, the average packet loss of the reconfigurable DCN decreases 1 order of magnitude and the server-to-server latency performance improves of 42.2%. Scalability investigation illustrates limited (11.7%) performance degradation as the reconfigurable network scale from 2560 to 40960 servers. Both the numerical and experimental assessments validate the proposed DCN with reconfigurable bandwidth feature and lower latency variations with respect to the inflexible DCNs.

• Access to Document (DOI)

Figure of merit of phase change materials for Mach-Zehnder interferometer-based and directional-coupler-based optical switches

Sakamoto K., Kuwahara M., Tsuda H.

Proceedings of SPIE - The International Society for Optical Engineering (Proceedings of SPIE - The International Society for Optical Engineering)  11276 2020

ISSN  9781510633155

　View Summary

© COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only. For further improvement of phase change material switches, relationships between optical characteristics of phase change materials(PCM) and the performance of optical switches were investigated. PCM optical switch is optimized for the both states of the insertion loss to be balanced. With optimized three-channel directional coupler switch, the refractive index difference between amorphous and crystalline state was inversely proportional to the insertion loss.

• Access to Document (DOI)

T/O バンドを用いた1000 チャネル級波長ルーティング技術による大容量かつ多様な光ネットワークの実現に向けて

久保亮吾、吉沢勝美、友松泰則、須藤誠、初鹿野圭、津田裕之

電子情報通信学会論文誌C (電子情報通信学会)  J102–C ( 12 ) 320 - 331 2019.12

Research paper (scientific journal), Joint Work, Accepted

Large-scale wavelength multi/demultiplexer using a spatial grating combined with arrayed waveguide gratings

Ohori A., Tsuda H.

Proceedings of SPIE - The International Society for Optical Engineering (Proceedings of SPIE - The International Society for Optical Engineering)  11184 2019

ISSN  0277786X

　View Summary

The C- and L-bands (1530 nm ∼ 1625 nm) are used for long-haul optical communication systems. The operating wavelength range needs to be extended to realize much broader transmission capacity with a low-cost modulation format. In this paper, we propose a large-scale wavelength multiplexer/demultiplexer using a conventional spatial grating in combination with arrayed-waveguide gratings (AWGs) to cover the whole fiber transmission wavelength range. The diffracted light from the spatial grating is spectrally decomposed and coupled to several AWGs for further demultiplexing. In this study, we designed a multi/demultiplexer which covers the O∼L-bands (186.2 THz ∼ 243.7 THz) with a channel spacing of 100 GHz. This has 9 sub-bands and 576 wavelength channels. The groove density of the spatial grating and the beam diameter on it are assumed to be 300 lines/mm and 1 mm x 1 mm, respectively. The diffracted light is coupled to 9 tapered waveguides on the edge of a planar lightwave circuit (PLC). The shape of the beam is changed by a cylindrical lens, to enhance the coupling efficiency. Each tapered waveguide is connected to an AWG with a center wavelength corresponding to the particular sub-band. AWGs with 64 output channels have a frequency spacing of 100 GHz. The transmission loss in the AWGs was calculated to be between -14.9 dB and -6.6 dB. The relatively large transmission loss was due to misalignment between the beam and the tapered waveguides.

• Access to Document (DOI)

Polarization Diversity Circuit Using Photonic Crystal Waveplates for 1.2-μm Quantum Dot Semiconductor Optical Amplifiers

Okuno Y., Sugiyama K., Hajikano T., Tomomatsu Y., Yoshizawa K., Tsuda H.

Proceedings of the 2018 Photonics in Switching and Computing, PSC 2018 (Proceedings of the 2018 Photonics in Switching and Computing, PSC 2018)   2018.09

　View Summary

Silica-based polarization diversity circuit for QD-SOA operating in T-band was fabricated. By connecting polarization diversity circuits to QD-SOA chip, the polarization dependent gain of less than 0.8 dB and the optical gain of 3.2 dB were achieved.

• Access to Document (DOI)

T/O-band wavelength routing system using quantum dot semiconductor devices and 1081-channel AWG router

Kubo R., Fujimoto T., Shobudani T., Okuno Y., Suzuki M., Tsuda H., Sudo M., Hajikano T., Tomomatsu Y., Yoshizawa K.

2018 Optical Fiber Communications Conference and Exposition, OFC 2018 - Proceedings (2018 Optical Fiber Communications Conference and Exposition, OFC 2018 - Proceedings)     1 - 3 2018.06

ISSN  9781943580385

　View Summary

© 2018 OSA. We demonstrate a wavelength routing system that covers a broad wavelength range of 1000-1360 nm, i.e., T/O-band. The system includes our developed T/O-band-specific quantum dot semiconductor devices and 1081-channel arrayed waveguide grating (AWG) router.

Integrated silicon photonic wavelength-selective switch using wavefront control waveguides

Nakamura F., Muramatsu K., Suzuki K., Tanizawa K., Ohtsuka M., Yokoyama N., Matsumaro K., Seki M., Koshino K., Ikeda K., Namiki S., Kawashima H., Tsuda H.

Optics Express (Optics Express)  26 ( 10 ) 13573 - 13589 2018.05

　View Summary

© 2018 Optical Society of America A wavelength selective switch (WSS) can route optical signals into any of output ports by wavelength, and is a key component of the reconfigurable optical add/drop multiplexer. We propose a wavefront control type WSS using silicon photonics technology. This consists of several arrayed waveguide gratings sharing a large slab waveguide, wavefront control waveguides and distributed Bragg reflectors. The structure, design method, operating principle, and scalability of the WSS are described and discussed. We designed and fabricated a 1 × 2 wavefront control type WSS using silicon waveguides. This has 16 channels with a channel spacing of 200 GHz. The chip size is 5 mm × 10 mm. The switching operation was achieved by shifting the phase of the light propagating in each wavefront control waveguide, and by controlling the propagation direction in the shared large slab waveguide. Our WSS has no crossing waveguide, so the loss and the variation in loss between channels were small compared to conventional waveguide type WSSs. The heater power required for switching was 183 mW per channel, and the average extinction ratios routed to Output#1 and Output#2 were 9.8 dB and 10.2 dB, respectively.

• Access to Document (DOI)

T/O-band wavelength routing system using quantum dot semiconductor devices and 1081-channel AWG router

Kubo R., Fujimoto T., Shobudani T., Okuno Y., Suzuki M., Tsuda H., Sudo M., Hajikano T., Tomomatsu Y., Yoshizawa K.

Optics InfoBase Conference Papers (Optics InfoBase Conference Papers)  Part F84-OFC 2018 2018

ISSN  9781557528209

　View Summary

© OSA 2018. We demonstrate a wavelength routing system that covers a broad wavelength range of 1000-1360 nm, i.e., T/O-band. The system includes our developed T/O-band-specific quantum dot semiconductor devices and 1081-channel arrayed waveguide grating (AWG) router.

• Access to Document (DOI)

Silicon photonics based 1 × 2 wavelength selective switch using fold-back arrayed-waveguide gratings

Nakamura F., Asakura H., Suzuki K., Tanizawa K., Ohtsuka M., Yokoyama N., Matsumaro K., Seki M., Koshino K., Ikeda K., Namiki S., Kawashima H., Tsuda H.

IEICE Electronics Express (IEICE Electronics Express)  15 ( 14 )  2018

ISSN  13492543

　View Summary

© 2018, Institute of Electronics Information Communication Engineers. All rights reserved. We report on a novel design of a wavelength selective switch (WSS) using silicon photonics technology. It comprises of 1 × 4 interleavers, arrayed-waveguide gratings (AWGs) connected to fold-back waveguides, and 1 × 2 optical Mach-Zehnder interferometer switches. In the proposed WSS, fold-back waveguides enable the AWGs to be used for both demulti-plexing and multiplexing. Therefore the WSS has less waveguide crossings than a conventional configuration. Moreover, a 20-channel, 200-GHz spacing, 1 × 2 fold-back type WSS was fabricated on 5 mm × 10 mm SOI chip using CMOS technology.

• Access to Document (DOI)

Demonstration of 10-Gbit/s transmission over G.652 fiber for T-band optical access systems using quantum-dot semiconductor devices

Kubo R., Matsunaga M., Shobudani T., Fujimoto T., Tsuda H., Sudo M., Hajikano T., Tomomatsu Y., Yoshizawa K.

IEICE Electronics Express (IEICE Electronics Express)  15 ( 18 )  2018

ISSN  13492543

　View Summary

© IEICE 2018. The wavelength range of 1000–1260 nm, known as T-band, where T denotes “thousand”, is one of the promising wavebands suitable for the future moderate-range optical networks. We have developed T-band specific semiconductor devices based on quantum-dot technology. However, the cut-off wavelength of optical fiber cables currently utilized in access networks, i.e., G.652 fibers, is specified to be less than 1260 nm. Therefore, the fibers do not fully support the T-band. This letter presents a demonstration of the feasibility of 10-Gbit/s transmission over G.652 fibers in the T-band by experiments.

• Access to Document (DOI)

量子ドットゲインチップおよびアレイ導波路回折格子を用いたTバンド波長分割多重通信用外部共振器レーザ

TSUDA HIROYUKI

電子情報通信学会論文誌C J100-C ( 8 ) 342 - 347 2017.08

Research paper (scientific journal), Joint Work, Accepted

Current-driven phase-change optical gate switch using indium–tin-oxide heater

Kentaro Kato, Masashi Kuwahara, Hitoshi Kawashima, Tohru Tsuruoka, and Hiroyuki Tsuda

Appl. Phys. Exp. 10 ( 7 ) 072201 2017.07

Research paper (scientific journal), Accepted

Polarization diversity circuit based on silica waveguides and photonic crystal waveplates for a 4×4 silicon optical switch

Koki Sugiyama, Takafumi Chiba, Ken Tanizawa, Keijiro Suzuki, Takayuki Kawashima, Shojiro Kawakami, Kazuhiro Ikeda, Hitoshi Kawashima, Hiroshi Takahashi, Hiroyuki Tsuda

IEICE Electron. Express 14 ( 10 ) 20170252 2017.05

Research paper (scientific journal), Joint Work, Accepted

Differential processing for frequency chirp measurement using optical pulse synthesizer

Ken Kashiwagi, Satoshi Seki, Hiroyuki Tsuda, Hirokazu Takenouchi, Takashi Kurokawa

Optics Communications 387   135 - 140 2017

Research paper (scientific journal), Joint Work, Accepted

6.4-THz-spacing, 10-channel cyclic arrayed waveguide grating for T- and O-band coarse WDM

Nazirul Afham Idris and Hiroyuki Tsuda

IEICE Electron. Express 13 ( 7 ) 20160134 2016.04

Research paper (scientific journal), Joint Work, Accepted

• Access to Document (DOI)

Amplitude Trimming of Si Waveguides Using Phase Change Material

Ryutaro Eguchi, Hideaki Asakura, Yasuro Shimazaki, Takumi Moriyama, Ghanshyam Singh, and Hiroyuki Tsuda

IEICE Electron. Express 13 ( 6 ) 20160107 2016.03

Research paper (scientific journal), Joint Work, Accepted

• Access to Document (DOI)

A WDM/TDM Access Network Based on Broad T-band Wavelength Resource Using Quantum Dot Semiconductor Devices

N. A. Idris, K. Yoshizawa, Y. Tomomatsu, M. Sudo, T. Hajikano, R. Kubo, G. Zervas, and H. Tsuda

IEEE Photonics Journal 8 ( 1 ) 7901510 2016.01

Research paper (scientific journal), Joint Work, Accepted

• Access to Document (DOI)

Full-mesh T- and O-band Wavelength Router Based on Arrayed Waveguide Gratings

N. A. Idris, K. Yoshizawa, Y. Tomomatsu, M. Sudo, T. Hajikano, R. Kubo, G. Zervas, and H. Tsuda

Optics Express 24 ( 1 ) 672 - 686 2016.01

Research paper (scientific journal), Accepted

Design　and　characterization　of an arrayed-waveguide grating router with an interleave-chirped array

Hideaki Asakura and Hiroyuki Tsuda

IEICE Electron. Express 12 ( 9 ) 20150261 2015.05

Research paper (scientific journal), Joint Work, Accepted

• Access to Document (DOI)

Evaluation of the phase error in Si-wire arrayed-waveguide gratings fabricated by ArF-immersion photolithography

Kyosuke Muramatsu, Hideaki Asakura, Keijiro Suzuki, Ken Tanizawa, Munehiro Toyama, Minoru Ohtsuka, Nobuyuki Yokoyama, Kazuyuki Matsumaro, Miyoshi Seki, Keiji Koshino, Kazuhiro Ikeda, Shu Namiki, Hitoshi Kawashima, Hiroyuki Tsuda

IEICE Electron. Express 12 ( 7 ) 20150019 2015.04

Research paper (scientific journal), Joint Work, Accepted

• Access to Document (DOI)

Ultra-compact, self-holding asymmetric Mach-Zehnder interferometer switch using Ge2Sb2Te5 phase-change material

Takumi Moriyama, Daiki Tanaka, Paridhi Jain, Hitoshi Kawashima, Masashi Kuwahara, Xiaomin Wang, and Hiroyuki Tsuda

IEICE Electron. Express 11 ( 15 ) 20140538 2014.06

Research paper (scientific journal), Joint Work, Accepted

• Access to Document (DOI)

Switching characteristics of a 100-GHz-Spacing Integrated 40-λ 1×4 Wavelength Selective Switch

Takemasa Yoshida, Hideaki Asakura, Takayuki Mizuno, Hiroshi Takahashi, and Hiroyuki Tsuda

IEEE Photon. Technol. Lett 26 ( 5 ) 451 - 453 2014

Joint Work

Compact and Phase-Error-Robust Multilayered AWG-based Wavelength Selective Switch Driven by a Single LCOS

Keisuke Sorimoto, Ken Tanizawa, Hisato Uetsuka, Hitoshi Kawashima, Masahiko Mori, Toshifumi Hasama, Hiroshi Ishikawa, and Hiroyuki Tsuda

Optics Express 21 ( 14 ) 17131 - 17149 2013

Joint Work

Integrated 40-λ 1×2 Wavelength Selective Switch with No Waveguide Crossings

Yuichiro. Ikuma, Takayuki. Mizuno, Hiroshi Takahashi, and Hiroyuki Tsuda

IEEE Photon. Technol. Lett. 25 ( 6 ) 531-534 2013

Research paper (scientific journal), Joint Work

MEMS mirror with slot structures suitable for flexible-grid WSS

Keisuke Sorimoto, Hitoshi Kawashima, Masahiko Mori, Toshifumi Hasama, Hiroshi Ishikawa, Hiroyuki Tsuda, and Hisato Uetsuka

IEICE Electron. Express 10 ( 3 ) 20120924 2013

Research paper (scientific journal), Joint Work

“Ultra-small, self-holding, optical gate switch using Ge2Sb2Te5 with a multi-mode Si waveguide

Daiki Tanaka, Yuya Shoji, Masashi Kuwahara, Xiaomin Wang, Kenji Kintaka, Hitoshi Kawashima, Tatsuya Toyosaki, Yuichiro Ikuma, and Hiroyuki Tsuda

Optics Express 20 ( 9 ) 10283-10294 2012

Research paper (scientific journal), Joint Work

200-GHz spacing, 8ch, high-speed wavelength selective arrayed-waveguide grating using buried PLZT waveguides

Hideaki Asakura, Keiichi Nashimoto, David Kudzuma, Masahiko Hashimoto, and Hiroyuki Tsuda,

IEICE Electron.Express 9 ( 7 ) 712-717 2012

Research paper (scientific journal), Single Work

High-speed wavelength selective operation of a PLZT-based arrayed-waveguide grating

H. Asakura, K. Nashimoto, D. Kudzuma, M. Hashimoto and H. Tsuda

Electron. Lett. 48 ( 16 ) 1009-1010 2012

Research paper (scientific journal), Joint Work

A novel silica waveguide lens for free-space optical cross connects

Nazirul Afham Idris, Keisuke Sorimoto, Hiroyuki Tsuda

IEICE Electron. Express 9 ( 11 ) 998-1004 2012

Research paper (scientific journal), Joint Work

Circulator-Free Reflection-Type Tunable Optical Dispersion Compensator Using Tandem Arrayed-Waveguide Gratings

Yuichiro Ikuma, Takayuki Mizuno, Hiroshi Takahashi, and Hiroyuki Tsuda,

IEEE J. Lightwave Technol 29 ( 16 ) 2447-2453 2011

Research paper (scientific journal), Single Work

Optical spectrum control circuit using an arrayed-waveguide grating and tunable phase shifters

Koichi Kato, Yuichiro Ikuma, Hiroshi Takahashi, Takayuki Mizuno, and Hiroyuki Tsuda

IEICE Electron 8 ( 6 ) 391-396 2011

Research paper (scientific journal), Joint Work

Demonstration of 1000-times switching of a phase-change optical gate with Si wire waveguides

D. Tanaka, Y. Ikuma, Y. Shoji, M. Kuwahara, X. Wang, K. Kintaka, H. Kawashima, T. Toyosaki and H. Tsuda

Electron. Lett. 47 ( 4 ) 268-269 2011

Research paper (scientific journal), Joint Work

Tunable Optical Dispersion Compensator with a High-Resolution Arrayed-Waveguide Grating

Yuichiro Ikuma, Takayuki Mizuno, Hiroshi Takahashi, and Hiroyuki Tsuda,

IEICE Electron. Express 8 ( 24 ) 2087-2092 2011

Research paper (scientific journal), Joint Work

Phase Error Compensation for Multilayered AWG in LCOS-based WSS

Keisuke Sorimoto, Kenji Kintaka, Hitoshi Kawashima, Masahiko Mori, Toshifumi Hasama, Hiroshi Ishikawa, Hiroyuki Tsuda, and Hisato Uetsuka,

IEICE Electron. Express 8 ( 24 ) 2054-2060 2011

Research paper (scientific journal), Joint Work

Small-sized optical gate switch using Ge2Sb2Te5 phase-change material integrated with a silicon waveguide

Y. Ikuma, Y. Shoji, M. Kuwahara, X. Wang, K. Kintaka, H. Kawashima, D. Tanaka, and H. Tsuda

Electronics Lett. 46 ( 5 ) pp. 368-369 2010

Research paper (scientific journal), Joint Work, Accepted

LiNbO3 optical switch using asymmetric X-junction waveguide for broadband optical network node

T. Sakamaki, Y. Narita, H. Tsuda, S. Nakajima, and T. Kawanishi,

IEICE Electronics Express 7 ( 5 ) pp.360-364 2010

Research paper (scientific journal), Joint Work, Accepted

K. Sorimoto, K. Kintaka, H. Kawashima, M. Mori, T. Hasama, Fast Aberration-Correcting Algorithm for an SLM-based Optical Switch

H. Ishikawa, H. Tsuda, and H. Uetsuka

IEICE Electron 7 ( 23 ) 1728-1734 2010

Research paper (scientific journal), Joint Work

Reversible optical gate switching in a Si wire waveguide integrated with a Ge2Sb2Te5 thin film

Y. Ikuma, Y. Shoji, M. Kuwahara, X. Wang, K. Kintaka, H. Kawashima, D. Tanaka, and H. Tsuda

Electron. Lett. 46 ( 21 ) 1460-1462 2010

Research paper (scientific journal), Joint Work

High-speed photonic functional circuits using electrically controllable PLZT waveguides

J. Ito, M. Yasumoto, K. Nashimoto, and H. Tsuda

IEICE TRANSACTIONS on Electronics E92-C ( 5 ) 713-718 2009

Research paper (scientific journal), Joint Work, Accepted

Small bend structures using trenches filled with low-refractive index material for miniaturizing silica planar lightwave circuits

J. Ito, and H. Tsuda

IEEE J. Lightwave Technol 27 ( 6 ) 786-790 2009

Research paper (scientific journal), Joint Work, Accepted

Low loss, small crosstalk offset crossing structure for large-scale planar lightwave circuits

D. Tanaka, Y. Ikuma, and H. Tsuda

IEICE Electronics Express 6 ( 7 ) 407-411 2009

Research paper (scientific journal), Joint Work, Accepted

Generation of 100-Gb/s Packets Having 8-Bit Return-to-Zero Patterns Using an Optical Pulse Synthesizer With a Lookup Table

Y. Tanaka, R. Kobe, T. Shioda, H. Tsuda, and T. Kurokawa

IEEE Photon. Technol. Lett. 21 ( 1 ) 39-41 2009

Research paper (scientific journal), Joint Work, Accepted

An athermal delay interference circuit using trenches filled with low-refractive index material

K. Iwamoto, J. Ito, and H. Tsuda,

IEICE Electronics Express 6 ( 24 ) pp.1769-1773 2009

Research paper (scientific journal), Joint Work, Accepted

Novel Silica-based Waveguide Type Polarization Beam Splitters Using Trenches Filled with Low-refractive Index Material

J. Ito, and H. Tsuda

IEEE J. Lightwave Technol. 27 ( 24 ) 5668-5674 2009

Research paper (scientific journal), Joint Work, Accepted

AWG-Based Tunable Optical Dispersion Compensator With Multiple Lens Structure

Y. Ikuma, and H. Tsuda

IEEE J. Lightwave Technol. 27 ( 22 ) 5202-5207 2009

Research paper (scientific journal), Joint Work, Accepted

Proposal of a small self-holding 2×2 optical switch using phase-change material

Y. Ikuma, T. Saiki, and H. Tsuda

IEICE Electronics Express 5 ( 12 ) 442-445 2008

Research paper (scientific journal), Joint Work, Accepted

Analog and digital optical pulse synthesizers using arrayed-waveguide gratings for high-speed optical signal processing

H. Tsuda, Y. Tanaka, T. Shioda, and T. Kurokawa

IEEE J. Lightwave Technol. 26 ( 6 ) 670-677 2008

Research paper (scientific journal), Joint Work, Accepted

Integrated Loop Mirrors for Catoptric Functional Waveguide Devices

Y. Ikuma, J. Ito, and H. Tsuda,

IEICE Electronics Express. 5 ( 5 ) 176-180 2008

Research paper (scientific journal), Joint Work, Accepted

Compact Silica arrayed-waveguide grating using high-mesa small-bend waveguides

J. Ito, T. Y. Fan, T. Suzuki, and H. Tsuda,

IEICE TRANSACTIONS on Electronics E91-c1 ( 1 ) 110－112 2008

Research paper (scientific journal), Joint Work, Accepted

Fabrication of (Pb,La)(Zr,Ti)O3 thin film arrayed waveguide grating

TSUDA HIROYUKI

Electron. Lett. 43 ( １ ) 24-25 2007

Research paper (scientific journal), Joint Work

180 Degree-Bend Structures Using Light Reflection at a Double Elliptic Mirror in a Slab Waveguide

H. Tsuda

Jpn. J. Appl. Phys., PT1 46 ( 1 ) 168-174 2007

Research paper (scientific journal), Joint Work, Accepted

Spectral Phase Encoder Employing an Arrayed-Waveguide Grating and a Phase-Shifting Structure

D. Miyamoto and H. Tsuda

IEEE Photonics Technol. Lett. 19 ( 17 ) 1289-1291 2007

Research paper (scientific journal), Joint Work, Accepted

Fabrication of (Pb,La)(Zr,Ti)O3 thin film arrayed waveguide grating

M. Yasumoto, T. Suzuki, H. Tsuda, M. Raj, D. Kudzuma, J. Dawley, D. Ritums, Y. Tanaka, M. LaBuda and K. Nashimoto,

Electron. Lett. 43 ( 1 ) 24-25 2007

Research paper (scientific journal), Joint Work, Accepted

180 Degree-Bend Structures Using Light Reflection at a Double Elliptic Mirror in a Slab Waveguide

M. Ishida, Y. Ikuma, and H. Tsuda

Jpn. J. Appl.Phys.PT1 46 ( 1 ) 168-174 2007

Research paper (scientific journal), Joint Work, Accepted

Beam Steering Type 1:4 Optical Switch Using Thermo-Optic Effect

K. Masuda, A. Tate, M. Ishida, T. SUzuki, and H. Tsuda

Opt.Rev. 13 ( 4 ) 184-188 2006

Research paper (scientific journal), Joint Work, Accepted

Multistage Polymeric Lens Structures Integrated into Silica Waveguides

T. Tate, T. Suzuki, and H. Tsuda

Jpn.J.Appl. Phys.,PT1 45 ( 8A ) 6288-6293 2006

Research paper (scientific journal), Joint Work, Accepted

Compact Arrayed-Waveguide Grating with Mulitiple-Arrowhead Structures

T. Suzuki and H. Tsuda

Jpn.J.Appl.Phys.,PT1 45 ( 7 ) 5775-5781 2006

Research paper (scientific journal), Joint Work, Accepted

Arrayed-Waveguide Grating with Wavefront Compensation Lense for Spatial Filter Integration

M. Yamamoto, T. Suzuki, A. Tate and H. Tsuda

IEICE Electronics Express 3 ( 11 ) 221-226 2006

Research paper (scientific journal), Joint Work, Accepted

A novel 2 x 2 multi-arm type of optical switch using multimode interference couplers

K. Masuda, A.Tate, and H.Tsuda

IEICE Electronics Express 3 ( 9 ) 191－196 2006

Research paper (scientific journal), Joint Work, Accepted

Waveform- controllable optical pulse generation using an optical pulse synthesezer

D. Miyamoto, K. Mandai, A. Aizawa, T. Kurokawa and H. Tuda

IEEE Photon. Tecnol. Lett. 18 ( 5 ) 721-723 2006

Research paper (scientific journal), Joint Work, Accepted

Repetition rate and center wavelength-tunabel optical pulse generation using an optical comb generator and a high resolution arrayed-waveguide grating

K. Mandai, D. Miyamato, T. Suzuki, H. Tsuda, A. Aizawa and T.Kurokawa

IEEE Photon. Technol.lett. 18 ( 5 ) 679-681 2006

Research paper (scientific journal), Joint Work, Accepted

Dispersion Compensator Using a Compact Arrayed-Waveguide Gration with a Dispersion-Adjusting Structure

T. Suzuki, K. Mandai, H. Ishikawa, Y. Abe, S. Kashimura, H. Uetsyuka and H. Tsuda

IEICE Electronics Express 3 ( 3 ) 58-63 2006

Research paper (scientific journal), Joint Work, Accepted

Compact silica arrayed-waveguide grating with small bend radius utilizing trenches filled with low-refractive index material

J. Ito, T. Y. Fan, T. Suzuki, and H. Tsuda

IEICE Electronics Express 3 ( 23 ) 499-503 2006

Research paper (scientific journal), Joint Work

Crosstalk reduction using tapered intersecting waveguides

Y. Kobayashi and H. Tsuda

Opt.Rev 12 ( 5 ) 387-390 2005.09

Research paper (scientific journal), Joint Work, Accepted

Small v-bend silica waveguide using an elliptic mirror for miniaturization of planar lightwave circuits

T.Suzuki, Y. Shibata and H. Tsuda

IEEE J. Lightwave Technol. 23 ( 2 ) 902-908 2005.06

Research paper (scientific journal), Joint Work, Accepted

Ultra Small Arrowhead Arrayed-Waveguide Grating With V-shaped Bend Waveguides

T. Suzuki and H. Tsuda

IEEE Photon. Technol. Lett. 17 ( 4 ) 810-812 2005.06

Research paper (scientific journal), Joint Work, Accepted

超高速光信号処理用アレー導波路回折格子

津田裕之

電子情報通信学会論文誌C J88-C ( 6 ) 421-427 2005.06

Research paper (scientific journal), Single Work, Accepted

Planar lightwave circuit dispersion compensator using a compact arrowhead arrayed-waveguide grating

T. Suzuki, K. Masuda, H. Ishikawa, Y. Abe, S. Kashimura, H. Uetsuka and H. Tsuda

IEICE Electronics Express 2 ( 23 ) 572-577 2005

Research paper (scientific journal), Joint Work, Accepted

Femtosecond laser processing through subwavelength thin metal slit arrays

A. Moroki, R. Kitano, M. Obara and H. Tsuda

Japan Journal of Applied Physics 44 ( 12 ) 8753-8758 2005

Research paper (scientific journal), Joint Work, Accepted

Design and evaluation of an N:N optical coupler using an integrated waveguide mirror

Y. Shibata, T. Suzuki and H.Tsuda

Optical Review 11 ( 3 ) 182-187 2004

Research paper (scientific journal), Joint Work, Accepted

Photonic encoder and decoder for optical code division multiplexing using time-to-space converters and angle-multiplexed holograms

H. Tsuda and H. Takenouchi

Appl. Opt 41 ( 2 ) 290-297 2002

Research paper (scientific journal), Joint Work, Accepted

Hybrid-integrated smart pixels for dense optical interconnects

H.Tsuda, T. Nakahara, T. Kurokawa,

IEICE Trans. Electron. 12   1771-1777 2001

Research paper (scientific journal), Joint Work, Accepted

Optical Interconnection Using VCSELs and Polymeric Waveguide Circuits

IEEE J. Lightwave Technol 18 ( 11 ) 1487-1492 2000.11

Research paper (scientific journal), Joint Work, Accepted

　View Summary

面発光レーザとポリマー光導波路を利用した光インターコネクションを提案した。面発光レーザを変調し、信号光をポリマー導波路を介して受信し、その受信感度特性を評価した。これらの結果から、本インターコネクションの設計指針と可能性を明らかにした。

640 Gbit/s (16 channel × 42.7 Gbit/s) WDM L-band DSF transmission experiment using 25 nm bandwidth AWG dispersion slope compensator

A. Hirano, K. Yonenaga, Y. Miyamoto, H. toba, H. Takenouchi, and H. Tsuda

Electron. Lett 36 ( 19 ) 1638-1639 2000.09

Research paper (scientific journal), Joint Work, Accepted

　View Summary

アレイ導波路回折格子を利用した分散スロープ補償回路を製作した。640 Gbit/s (16 channel × 42.7 Gbit/s) WDM伝送実験に利用し、良好な補償特性を実証した。

640-Gbit/s(16 ch×42.7 Gbit/s) WDM L-band DSF transmission with 25-nm bandwidth slope compensator

A. Hirano, K. Yonenaga, Y. Miyamoto,H. Takanouchi, H. Tsuda, and H. Toba

ECOC (European Conference on Optical Communication) 2000, 10.1.2  2000.09

Joint Work, Accepted

　View Summary

640 Gbit/s (16 channel × 42.7 Gbit/s) WDM伝送にアレイ導波路回折格子型分散スロープ補償器を利用し、良好な受信感度特性を得た。

16-ch dispersion-slope compensator for 40 Gbit/s transmission systems using an AWG and a spatial filter

H. Takenouchi, H. Tsuda, T. Goh, A. Hirano,K. Yonenaga, T. Ishii, and K. Okamoto

ECOC (European Conference on Optical Communication) 2000, 3.2.3  2000.09

Joint Work, Accepted

　View Summary

40Gbit/s-WDMシステム用の分散スロープ補償回路を作製し、群遅延特性が設計通りであることを実証した。

Optical information processing using arrayed-waveguide gratings and its application to optical communication systems

H. Tsuda and T. Kurokawa

APCOM’2000 (Asia-Pacific Conference on fundamental problems of Opto- and Microelectronics)    140-145 2000.09

Joint Work, Accepted

　View Summary

アレイ導波路回折格子を利用した光信号処理について概説した。また、その光通信への応用についてまとめた。

アレイ導波路回折格子を用いた時空間変換光信号処理と通信及び情報処理への応用

黒川、竹ノ内、津田

レーザ研究 28 ( 8 ) 486-491 2000.08

Research paper (scientific journal), Joint Work, Accepted

　View Summary

アレイ導波路回折格子による、時空間光情報処理の光通信および情報処理への応用について概説した。

Performance analysis of a dispersion compensator using arrayed-waveguide gratings

H. Tsuda, H. Takenouchi, A. Hirano,T. Kurokawa, and K. Okamoto

IEEE J. Lightwave Technol 18 ( 8 ) 1139-1141 2000.08

Research paper (scientific journal), Joint Work, Accepted

　View Summary

アレイ導波路回折格子を利用した分散補償器の補償能力を解析し、補償能力を高める方法を明らかにした。

High-sensitivity 1-Gb/s CMOS receiver integrated with a III-V photodiode by wafer-bonding

T. Nakahara, H. Tsuda, K. Tateno, N. Ishihara, and C. Amano

2000 IEEE/LEOS Summer topical meetings, M. A. 3.2  2000.07

Joint Work, Accepted

　View Summary

ポリイミドウエハ張り合わせ技術を利用してGaAs及びInPフォトダイオードをCMOS受信回路上にハイブリッド集積した。1Gbit/sまで良好な受信感度特性を得ることが出来た。

Analysis of optical-signal processing using an arrayed-waveguide grating

H. Takenouchi, H. Tsuda, and T. Kurokawa

Optics Express 6 ( 6 ) 124-135 2000

Research paper (scientific journal), Joint Work, Accepted

and C. Amano, “Investigation of data transmission characteristics of polarization-controlled 850 nm GaAs-based VCSELs grown on (311)B substrates

H. Uenohara, K. Tateno, T. Kagawa, Y. Ohiso, H. Tsuda, T. Kurokawa

Electron. Lett. 35   45-46 1999

Research paper (scientific journal), Joint Work, Accepted

Spectral encoding of 10 Gbit/s femtosecond pulses using a high resolution arrayed-waveguide grating

H. Tsuda, H. Takenouchi, T. Ishii, K. Okamoto, T. Goh, K. Sato, A. Hirano, T. Kurokawa, and C. Amano

Electron. Lett. Vol. 35, No. 14, pp.1186-1188(1999) 35 ( 14 ) 1186-1188 1999

Research paper (scientific journal), Joint Work, Accepted

All-optical discrimination based on nonlinear transmittance of MQW semiconductor optical gates

A. Hirano, H. Tsuda, H. Kobayashi, R. Takahashi, M. Asobe, K. Sato, and K. Hagimoto

IEEE J. Lightwave Technol., Vol. 17, pp. 873-884(1999). 17   873-884 1999

Research paper (scientific journal), Joint Work, Accepted

Second- and third-order dispersion compensator using a high-resolution arrayed-waveguide grating

H. Tsuda, K. Okamoto, T. Ishii, K. Naganuma, Y. Inoue, H. Takenouchi, and T. Kurokawa

IEEE Photon. Technol. Lett. 11   569-571 1999

Research paper (scientific journal), Joint Work, Accepted

Investigation of dynamic polarization stability of 850-nm GaAs-based vertical-cavity surface emitting lasers grown on (311)B and (100) substrates

H. Uenohara, K. Tateno, T. Kagawa, Y. Ohiso, H. Tsuda, T. Kurokawa, and C. Amano

IEEE Photon. Technol. Lett. 11   400-402 1999

Research paper (scientific journal), Joint Work, Accepted

Hybrid integration of smart pixels by using polyimide bonding: demonstration of a GaAs p-i-n photodiode/CMOS receiver

T. Nakahara, H. Tsuda, K. Tateno, S. Matsuo, and T. Kurokawa

IEEE J Select Topics Quantum Electron 5 ( 2 ) 209-216 1999

Research paper (scientific journal), Joint Work, Accepted

10Gbit/s RZ all-optical discrimination using refined saturable absorber optical gate

A. Hirano, H. Kobayashi, H. Tsuda, R. Takahashi, M. Asobe, K. Sato, and K. Hagimoto

Electron. Lett. 34   198-199 1998

Research paper (scientific journal), Joint Work, Accepted

Hybrid integration of GaAs pin-photodiodes with CMOS transimpedance amplifier circuits

T. Nakahara, H. Tsuda, K. Tateno, S. Matsuo, and T. Kurokawa

Electron. Lett. 34   1352-1353 1998

Research paper (scientific journal), Joint Work, Accepted

Differential processing of ultrashort optical pulses using arrayed-waveguide grating with phase-only filter

H. Takenouchi, H. Tsuda, K. Naganuma, T. Kurokawa, Y. Inoue, and K. Okamoto

Electron. Lett. 34   1245-1246 1998

Research paper (scientific journal), Joint Work, Accepted

Design approaches for VCSEL’s and VCSEL-based smart pixels toward parallel optoelectronic processing systems

T. Kurokawa, S. Matsuo, T. Nakahara, K. Tateno, Y. Ohiso, A. Wakatsuki, and H. Tsuda,

Appl. Opt. 37 ( 2 ) 194-204 1998

Research paper (scientific journal), Joint Work, Accepted

Use of polyimide bonding for hybrid integration of a vertical cavity surface emitting laser on a silicon substrate

S. Matsuo, K. Tateno, T. Nakahara, H. Tsuda, and T. Kurokawa

Electron. Lett. 33   1148-1149 1997

Research paper (scientific journal), Joint Work, Accepted

Time-space-conversion optical signal processing using arrayed-waveguide grating

T. Kurokawa, H. Tsuda, K. Okamoto, K. Naganuma, H. Takenouchi, Y. Inoue, and M. Ishii

Electron. Lett. Vol. 33, No. 22, pp.1890-1891 (1997). 33 ( 22 ) 1890-1891 1997

Research paper (scientific journal), Joint Work, Accepted

2.4Gbit/s all-optical pulse discrimination experiment using a high-speed saturable absorber optical gate

H. Tsuda, A. Hirano, R. Takahashi, K. Sato, and K. Hagimoto

Electron. Lett. 33   365-366 1996

Research paper (scientific journal), Joint Work, Accepted

Polarization-independent tunable liquid-crystal Fabry-Perot interferometer filters

H. Tsuda, T. Yoshizawa, K. Hirabayashi, and T. Kurokawa

Jpn. J. Appl. Phys. Part 1 35   2156-2163 1996

Research paper (scientific journal), Joint Work, Accepted

Digital signal regeneration with side-injection-light-controlled bistable laser diode as a wavelength converter

K. Nonaka, Y. Noguchi, H. Tsuda, and T. Kurokawa

IEEE Photon. Technol. Lett. 7   29-31 1995

Research paper (scientific journal), Joint Work, Accepted

Digitally signal-regenerating optical fiber loop memory with side-injection-light-controlled bistable laser diode

K. Nonaka, H. Tsuda, and T. Kurokawa

Jpn. J. Appl. Phys. 34   6092-6097 1995

Research paper (scientific journal), Joint Work, Accepted

Polarization independent tunable liquid crystal Fabry-Perot interferometer filter module with double-pass configuration

H. Tsuda, T. Yoshizawa, and T. Kurokawa

Electron. Lett. 31   828-829 1995

Research paper (scientific journal), Joint Work, Accepted

10ps pulse all-optical discrimination using a high-speed saturable absorber optical gate

A. Hirano, H. Tsuda, K. Hagimoto, R. Takahashi, and Y. Kawamura

Electron. Lett. 31   736-737 1995

Research paper (scientific journal), Joint Work, Accepted

Operation Characteristics of a side-light-injection multiple-quantum-well bistable laser for all-optical switching

H. Uenohara, Y. Kawamura, H. Iwamura,K. Nonaka, H. Tsuda, and T. Kurokawa

Jpn. J Appl. Phys. Part I, No. 1B 33   815-821 1994

Research paper (scientific journal), Joint Work, Accepted

Optical nonlinear characteristics of a side-injection light-controlled laser diode with a multiple-quantum-well saturable absorption region

K. Nonaka, H. Tsuda, H. Uenohara, H. Iwamura, and T. Kurokawa

IEEE Photon. Technol. Lett. 5   139-141 1993

Research paper (scientific journal), Joint Work, Accepted

Wide range wavelength conversion experiments using a side-injection light-controlled bistable laser diode

H. Tsuda, K. Nonaka, K. Hirabayashi, H. Uenohara, H. Iwamura, and T. Kurokawa

Applied Physics Letters 63 ( 23 ) 3116-3118 1993

Research paper (scientific journal), Joint Work, Accepted

Tunable liquid-crystal fabry-perot interferometer for wavelength-division multiplexing communication systems

K. Hirabayashi, H. Tsuda, and T. Kurokawa

IEEE J. Lightwave Technol 11   2033-2043 1993

Research paper (scientific journal), Joint Work, Accepted

Set and reset operation dependence on input light intensity of side-light-injection MQW bistable laser

H. Uenohara, Y. Kawamura, H. Iwamura, K. Nonaka, H. Tsuda, and T. Kurokawa

Electron. Lett. 29   1609-1611 1993

Research paper (scientific journal), Joint Work, Accepted

All-optical bit pattern matching with photonic switching arrays

S. Matsuo, T. Kurokawa, H. Tsuda, and C. Amano

IEEE Photon.Technol. Lett. 4 ( 7 ) 267-269 1992

Research paper (scientific journal), Joint Work, Accepted

Side-light-injection MQW bistable laser using saturable absorption and gain quenching

H. Uenohara, Y. Kawamura, H. Iwamura, K. Nonaka, H. Tsuda, and T. Kurokawa

Electron. Lett. 28   1973-1975 1992

Research paper (scientific journal), Joint Work, Accepted

Tunable wavelength-selective liquid crystal filters for 600-channel FDM systems

K. Hirabayashi, H. Tsuda, and T. Kurokawa

IEEE Photon. Technol. Lett., 4   597-599 1992

Research paper (scientific journal), Joint Work, Accepted

Tunable wavelength conversion using a liquid crystal filter and a bistable laser diode,”

H. Tsuda, K. Hirabayashi, H. Iwamura, and T. Kurokawa

Appl. Phys. Lett. 61   1724-1726 1992

Research paper (scientific journal), Joint Work, Accepted

Photonic memory switch: monolithic integration of a voltage-controlled bistable laser diode and an optical gate

H. Tsuda, T. Kurokawa, H. Uenohara, and H. Iwamura

IEEE Photon. Technol. Lett., Vol.4, No7, pp.760-762(1992). 4 ( 7 ) 760-762 1992

Research paper (scientific journal), Joint Work, Accepted

Narrow-band tunable wavelength-selective filters of fabry-perot interferometers with a liquid crystal intracavity

K. Hirabayashi, H. Tsuda, and T. Kurokawa

IEEE Photon. Technol. Lett. 3   213-215 1991

Research paper (scientific journal), Joint Work, Accepted

Optical triode operation characteristics of nonlinear etalons

H. Tsuda, S. Fukushima and T. Kurokawa

Appl. Opt. 30   5136-5142 1991

Research paper (scientific journal), Joint Work, Accepted

New structure of tunable wavelength-selective filters with a liquid crystal for FDM systems

K. Hirabayashi, H. Tsuda, and T. Kurokawa

IEEE Photon. Technol. Lett. 3   741-743 1991

Research paper (scientific journal), Joint Work, Accepted

Tunable light source using a liquid-crystal Fabry-Perot interferometer

H. Tsuda, K. Hirabayashi, Y. Tohmori, and T. Kurokawa,

IEEE Photon. Technol. Lett. 3   504-506 1991

Research paper (scientific journal), Joint Work, Accepted

All-optical triode device design using a nonlinear etalon and GRIN lenses

H. Tsuda and T. Kurokawa

Appl. Opt. 29   5054-5059 1990

Research paper (scientific journal), Joint Work, Accepted

Construction of an all-optical flip-flop by combination of two optical triodes

H. Tsuda and T. Kurokawa,

Appl. Phys. Lett. 57   1724-1726 1990

Research paper (scientific journal), Joint Work, Accepted

Optical triode switch module with a nonlinear etalon

H. Tsuda and T. Kurokawa

IEEE Photon. Technol. Lett., Vol.1, pp. 449-451(1989). 1   449-451 1989

Research paper (scientific journal), Joint Work, Accepted

Thermal optical bistability in InGaAs/InAlAs MQW etalons at 1.5m wavelength

K. Nonaka, H. Kawaguchi, Y.Kawamura, H. Tsuda, and K. Kubodera

IEEE Photon. Technol. Lett., Vol. 1   55-58 1989

Research paper (scientific journal), Joint Work, Accepted