Details of a Researcher - Ishigure, Takaaki

Presentations -

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海外動向調査：ECTCから

ISHIGURE TAKAAKI

第46回ＯＰＴ(Optical Packaging Technology)公開研究会 (東京都杉並区) ,

2011.07

Oral presentation (invited, special), エレクトロニクス実装学会　光回路実装技術研究会

Maximum Channel Density in Multimode Optical Waveguides for Parallel Interconnections

ISHIGURE TAKAAKI, ISIGURO RYOTA UNO HISASHI, Hsu Hsiang-Han

Electronic Components & Technology Conference ECTC2011 (Orland, Florida, USA) ,

2011.06

Poster presentation, IEEE Components,Packaging and Manufacturing Technology Society (CPMT) and the Electronic Components Association (ECA)

The maximum channel alignment density of multimode
optical waveguides is presented for the first time from the
viewpoint of inter-channel crosstalk. The inter-channel
crosstalk is theoretically estimated by taking into account the
two possible origins (mode coupling and mode conversion) of
crosstalk we have focused. Then, we show the advantage of
GI cores for reducing the “crosstalk due to mode coupling” by
numerically solving the coupling length of each mode. From
the viewpoint of mode coupling, we can say the minimum
inter-core space should be 10 m for GI-core waveguides,
while more space is required for SI cores in order to maintain
the crosstalk less than -20 dB.

ポンプ・プローブ法を用いたポリマー光ファイバ中の誘導ブリルアン散乱の観測

MIZUNO YOSUKE, KISHI MASATO, HOTATE KAZUO, ISHIGURE TAKAAKI, NAKAMURA KENTARO

電子情報通信学会 2011総合大会 (東京) ,

2011.03

Oral presentation (general), 電子情報通信学会

高速・高密度オンボードインターコネクションのためのポリマー光導波路

ISHIGURE TAKAAKI

電子情報通信学会　2011総合大会 (東京都市大学　世田谷キャンパス) ,

2011.03

Oral presentation (invited, special), 電子情報通信学会

ポリマー並列光導波路におけるクロストーク要因の解析と導波路構造設計

SHITANDA KEISHIRO, HSU HSIANG-HAN, ISHIGURE TAKAAKI

第25回エレクトロニクス実装学会春季講演大会 (横浜国立大学) ,

2011.03

Oral presentation (general), エレクトロニクス実装学会

Densely-aligned graded-index multiple-core polymer optical waveguide: fabrication and inter-channel crosstalk property

ISHIGURE TAKAAKI, MATSUO KENSHIRO, NITTA YOSUKE, SUGIMORI YUSUKE, MORIKAWA SHIN

SPIE Photonics West 2011 (San Francisco, CA, USA) ,

2011.01

Oral presentation (general), SPIE

We present on-board fabrications for densely-aligned graded-index (GI) multiple-core polymer optical waveguides utilizing soft-lithography or dispensers, in order to realize the board-level optical interconnections with these waveguides. We experimentally confirm that near parabolic refractive index profiles are formed in the cores of newly developed 20-cm long waveguides (40 um x 40 um size at 75-um pitch). We also use a copolymer for forming the GI profile, and then, confirm the high-temperature stability of the parabolic index profile compared to the one formed with a doped polymer. Finally, we discuss about the crosstalk property of the fabricated waveguides.

Inter-channel crosstalk analysis for W-shaped and graded-index core polymer optical waveguides with ray tracing method

HSU HSIANG-HAN, KEISHIRO SHITANDA, ISHIGURE TAKAAKI

SPIE Photonics West 2011 (San Francisco, CA, USA) ,

2011.01

Oral presentation (general), SPIE

We newly develop W-shaped graded-index core polymer optical waveguide which performs high bandwidth and low crosstalk. Although this is capable of being used in high performance computers, we propose to clarify the inter-channel crosstalk results from mode conversion more significantly. In this paper, first we demonstrate the experiment results, and then we apply the ray-trace simulation to show the ray trajectories, length dependent near field patterns, and crosstalk values. Furthermore, we visually and numerically compare the performance between the conventional step-index and our graded-index type counterparts. These investigations prove that W-shaped and graded-index core waveguides have high potential to be used in high-speed optical interconnections.

Fabrication of GI-Core Polymer Optical Waveguide Using a Dispenser and Its Application to Optical Printed Circuit Boards

MORIKAWA SHIN, ISHIGURE TAKAAKI

IEEE Photonics Society, Annual Meeting (Denver, CO, USA) ,

2010.11

Oral presentation (general), IEEE

GI-core Polymer Parallel Optical Waveguide with High-Loss, Carbon-black Doped Cladding for Extra Low Inter-channel Crosstalk

UNO HISASHI, ISHIGURE TAKAAKI

IEEE Photonics Society, Annual Meeting (Denver, CO, USA) ,

2010.11

Oral presentation (general), IEEE

Propagation Mode Analysis for Polymer Optical Waveguide with Graded Index Rectangular Core

MATSUO KENSHIRO, YAMAZAKI RYUTARO, ISHIGURE TAKAAKI

IEEE Photonics Society Annual Meeting (Denver, CO, USA) ,

2010.11

Oral presentation (general), IEEE

海外の研究開発動向－ECOC2010から－

ISHIGURE TAKAAKI

第44回ＯＰＴ(Optical Packaging Technology)公開研究会 (東京都　エレクトロニクス実装学会　回路会館) ,

2010.10

Oral presentation (invited, special), エレクトロニクス実装学会　光回路実装技術研究会

光配線板のための基板実装型GIコアポリマー並列光導波路

SUGIMORI YUSUKE　/　NITTA　YOSUKE　/　ISHIGURE TAKAAKI

第71回　応用物理学会学術講演会 (長崎大学) ,

2010.09