Presentations -

High-Power Polymer Optical Fiber Lasers and Amplifiers

KOBAYASHI TAKEYUKI, KURIKI KEN, IMAI NANA, TAMURA TOSHIHIKO, SASAKI KEISKUKE, KOIKE YASUHIRO, OKAMOTO YOSHIYUKI

[International presentation]  Photonics West, Optoelectronics ’99, Symposium on Organic Photonic Device (California, USA) , 

1999.01

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Oral presentation (invited, special), The Society for Optical Engineering, (SPIE)

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We demonstrate efficient and photostable laser action in graded index polymer fiber laser with organic dyes such as Rhodamine, Perylene and Pyrromethenes. Slope efficiency of 47% and output of 2.6 mJ have been obtained with a Rhodamine 6G-doped fiber laser. Moreover, we encapsulated rare ions to incorporate them into polymer matrices and studies spectroscopic properties of europium chelates in polymer hosts. Superfluorescent polymera fiber source based on Eu chlate-doped polymer optical fiber was demonstrated.

屈折率分布型ポリマー光ファイバーの現状と展望

KOIKE YASUHIRO, NIHEI EISUKE, ISHIGURE TAKAAKI

[Domestic presentation]  98-2高分子エレクトロニクス研究会 光を透す高分子とエレクトロニクス (Tokyo) , 

1999.01

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Oral presentation (invited, special), 社団法人　高分子学会　高分子エレクトロニクス研究会

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ＧＩ型ＰＯＦの現状とその展望について述べる。

高速プラスチック光ファイバーの最新向

KOIKE YASUHIRO, ISHIGURE TAKAAKI

[Domestic presentation]  第12回光通信システムシンポジウム (神奈川) , 

1998.12

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Oral presentation (invited, special), 社団法人　電子情報通信学会　光通信システム研究専門委員会

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アクセス系やＬＡＮ等システムの低価格性が期待されるネットワークにおいて実用化が期待される大口径、低損失、ＧＩ型ＰＯＦに関して近年得られてきた材料検討による実験的なアプローチ、および理論的な解析を通した低損失化・広帯域化技術について述べる。

High-Speed, Low-Loss Polymer Optical Fibre

KOIKE YASUHIRO

[International presentation]  Reliability of Polymeric Materials, Plastic Packages of IC Devices, (POLY'98) (Paris, France) , 

1998.11

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Oral presentation (invited, special), IEEE

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High-bandwidth and low-loss graded-index polymer optical fiber (GI POF) is introduced. With using a new polymer material, perfluorinated (PF) polymer, the attenuation of POF is lowered to around 40 dB/km, which enables 500 to 1000m transmission. More accurate analysis of the bandwidth characteristics of GI POF to realize the order of giga bit data transmission is quantitatively clarified in this paper. Furthermore, it was clarified that the stability of the refractive index profile and the attenuation under high temperature and high humidity atmosphere could be remarkably improved selecting the suitable dopant material.

Recent Progress of Low-Loss, High-Bandwidth Polymer Optical Fiber and Polymer Optical Fiber Amplifier

KOIKE YASUHIRO

[International presentation]  8th Iketani Conference ,4th International Conference on Organic Nonlinear Optics (ICONO'4) (Chitose, Hokkaido, Japan) , 

1998.10

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Oral presentation (invited, special)

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低損失、広帯域屈折率分布型ポリマー光ファイバーおよび、ポリマー光ファイバー増幅器の最近の進展を解説した。

POF -From the Past to the Future

KOIKE YASUHIRO

[International presentation]  Seventh International Plastic Optical Fibers Conference'98 (POF98) (Berlin, Germany) , 

1998.10

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Oral presentation (invited, special), International Committee of POF (ICPOF)

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History of POF development and recent breakthrough in technology of POF are reviewed, particularly focusing on the data transmission. Recent trend of the multimedia network has triggered the new application of POF as the high speed datacommunication medium. Possible bandwidth and transmission distance achieved by POF are quantitatively clarified. Based on such prospects, the high-speed network in future is proposed.

Recent Progress in High-Speed Polymer Optical Fibers

KOIKE YASUHIRO, ISHIGURE TAKAAKI

[International presentation]  Plastics in Telecommunications VIII (London, UK) , 

1998.09

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Other, IMO Communications

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Recent progress of the graded-index polymer optical fiber (GI POF) is reviewed. Because the low attenuation of light transmission in the perfluorinated (PF) polymer based GI POF enables 500 to 1000 m transmission, more accurate analysis is required in the refractive index profile to realize the order of giga bit data transmission. The bandwidth characteristics of the GI POF were quantitatively clarified in this paper. Furthermore, it was clarified that the stability of the refractive index profile and the attenuation under high temperature and high humidity atmosphere could be remarkably improved by selecting the suitable dopant material.

A LCD Backlight System Using The Highly Scattering Optical Transmission Polymer.

KOIKE YAUSHIRO, HORIBE AKIHIRO, BABA MASAHIRO, TAGAYA AKIHIRO

[Domestic presentation]  第69回微小光学研究会 (Tokyo) , 

1998.09

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Oral presentation (invited, special), Group of Microoptics The Optical Society of Japan (The Japan Society of Applied Physics)

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A new new concept LCD backlighting system using the highly sacattering optical transmission (HSOT) polymer has the twice the brightness of the conventional backlight and uniform illumination. Light scattering phenomenon of a spheircal perticle inside the HSOT polymer is caluculated in detail by the Mie scattering theory. It was confirmed theoretically that, the color illuminated from the HSOT backlight could be controlled by the sphesified scatter leading to a high efficiency and high-visual quarity LCD backlighting system.

High-Bandwidth, Low-Loss Graded-Index Polymer Optical Fiber for Near Infrared Use

ISHIGURE TAKAAKI, NIHIE EISUKE, KOIKE YASUHIRO

[International presentation]  24th European Conference on Optical Communication (ECOC’98) (Madrid, Spain) , 

1998.09

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Oral presentation (invited, special)

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Bandwidth characteristics and refractive index profile formation of the low-loss Graded-Index Polymer Optical Fiber were described. Low material dispersion of the perfluorinated polymer based GI POF provides higher bandwidth than the conventional silica based GI multimode fiber in visible to near infrared region.

Plastic Optical Fiber

KOIKE YASUHIRO, ISHIGURE TAKAAKI

[Domestic presentation]  光ファイバ応用技術研究会　技術研究報告会 (千歳) , 

1998.09

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Oral presentation (invited, special), The Institute of Electronics, Infromation and Communication Engineers

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A lot of research interests are forcused on the introduction of optical fiber even in the access network because of the growing demand for accessing the Internet with high bit rate. Since inexpensive total cost is strongly required for LAN or access network, we have proposed a large-core, low-loss, and high-bandwidth graded-index polymer optical fiber (GI POF) as a promising candidate of physical media. In this paper, we describe the recent development of the GI POF in its attenuation and bandwidth achieved by investigating a new polymer material and by theoretical analysis.

低損失プラスチックファイバーの開発

KOIKE YASUHIRO

[Domestic presentation]  日本光学第32回サマーセミナー (諏訪) , 

1998.08

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Oral presentation (invited, special)

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GIプラスチック光ファイバーの構造、作成法、その特性について詳細に解説する。

フォトニクスポリマー　-高速伝送・高画質のディスプレイ-

KOIKE YASUHIRO

[Domestic presentation]  第46回　高分子夏季大学 高分子－深化と進展 (長崎) , 

1998.07

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Oral presentation (invited, special), The Society of Polymer Science, Japan

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伝送として高速通信が可能な屈折率分布型(GI型）ポリマー光ファイバーを、ディスプレイとしてポリマー内に均一にミクロ不均一構造を形成させた高輝度光散乱ポリマー導光体からなるLCDについて、従来の屈折率均一材料と比較しつつ解説する。

Bandwidth and Transmission Distance Achieved by POF

KOIKE YASUHIRO, ISHIGURE TAKAAKI, SATOH MASATAKA, NIHEI EISUKE

[International presentation]  3rd Optoelectronics and Communications Conference (OECC'98) (Chiba, Japan) , 

1998.07

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Oral presentation (invited, special), IEICE Communications Society IEICE Electronics Society

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The progress of the GI Polymer optical fiber (GI POF) for high-speed telecommunication is reviewed. Gigabit data transmission for several hundred meters from visible to 1.3µm wavelength was experimentally enabled by low-loss perfluorinated polymer based GI POF. Possible bandwidth and transmission distance achieved by POF are described in this paper.

High-Speed Palstic Optical Fibers and Amplifiers

KOIKE YASUHIRO, ISHIGURE TAKAAKI, KOBAYASHIBTAKEYUKI, NIHEI EISUKE

[International presentation]  Photonics Taiwan, An Asia Pacific Symposium on Optoelectronics, Technical Conference on Optoelectronic Materials and Devices (Taipei, Taiwan) , 

1998.07

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Oral presentation (invited, special), The International Society for Optical Engineering (SPIE)

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Recent progress of graded-index polymer optical fiber (GI POF) and POF amplifier (POFA) are reviewed. Because the low attenuation of light transmission in the perfluorinated (PF) polymer, PF polymer based GI POF enables 500 to 1000m transmission, more accurate analysis is required in the refrective index profile to realize the order of giga bit transmission. Furthermore, recent improvement of the thermal stability of the GI POF is intorduced. We clarified that the stability of the refractive index profile and the attenuation under high temperature and high humidity atomosphere can be improved by selecting the suitable dopant material.
We demonstrated that the organic dye-doped POFA cover a wide spectral range in the visible with the best observed gain of 37 dB in a Rhodamine B-doped POFA pumped at 550nm. Also, with an europium chirate of hexafluoroacetylacetone in tris form doped GI POF, we observed superfluorescence, evidenced by spectral narrowing and lifetime shortening. The propospect is that the wide choice of ortganic dyes and rare earth chelates offers optical amplifiers and superfluorescent source for a variety of communication and sensor applications.

Graded Index Polymer Optical Fiber for Gbit/s Systems from Visible to 1.3 Micron Wavelength

KOIKE YASUHIRO、ISHIGURE TAKAAKI

[International presentation]  The 1998 International Conference on Applications of Photonic Technology, (ICAPT’98) (Ottawa, Ontario, Canada) , 

1998.07

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Oral presentation (invited, special)

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低損失、広帯域屈折率分布型ポリマー光ファイバーの最近の進展を解説した。

Polymer Optical Fibers

KOIKE YAUSHIRO, ISHIGURE TAKAAKI, SATO MASATAKA, NIHEI EISUKE

[International presentation]  IEEE/LEOS Summer Topical Meetings (Monterey Calfornia, USA) , 

1998.07

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Oral presentation (invited, special), IEEE Lasers and Electro-Optics Society

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The progress of the GI polymer optical fiber (POF) for high-speed telecommunication is reviewed. Gigabit data transmission for several hundred meters from visible to 1.3-µm wavelength was experimentally enabled by the low-loss perfluorinated (PF) polymer based GI POF. We described an improvement in the thermal stability and long-term reliability of the GI POF.

Fabrication of Optical and Electronic Devices

KOIKE YASUHIRO

[International presentation]  The Polymer Processing Society 14th Annual Meeting (PPS-14) (Yokohama, Japan) , 

1998.06

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Other, The Polymer Processing Society

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高分子材料を用いた光学素子の作製方法とその特性の解説

光機能フォトニクスポリマー

KOIKE YASUHIRO

[Domestic presentation]  98/1　高分子可能性講座 新高分子材料 (東京) , 

1998.04

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Oral presentation (invited, special), The Society of Polymer Science, Japan

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”伝送”として高速通信が可能な屈折率分布型（GI型）ポリマー光ファイバー、”発信”として誘導放出能を有する有機物質をわずかに含むポリマー光ファイバー増幅器、”表示”としてディスプレイとしてポリマー内均一にミクロ不均一構造を形成させた高輝度光散乱ポリマー導光体からなるLCDについて、従来の屈折率均一材料と比較しつつ解説する。

新しいフォトニクスポリマーの提案〜高輝度ディスプレイー、ゼロ複屈折レンズ、高速POF 〜

KOIKE YASUHIRO

[Domestic presentation]  KAST科学技術セミナー 光の科学と技術　２ (川崎) , 

1998.03

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Oral presentation (invited, special), 財団法人　神奈川科学技術アカデミー

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高速ポリマー光ファイバーの特性評価と実際のマルチメディアネットワークへの応用検討

マルチメディアのためのフォトニクスポリマー

KOIKE YASUHIRO

[Domestic presentation]  第６回東邦21世紀フォーラム (静岡) , 

1998.01

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Oral presentation (invited, special), 東邦レーヨン株式会社

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新しい機能性フォトニクス材料に付き、現在研究開発中の超高速ポリマー光ファイバー、光散乱ポリマー導光体、ゼロ複屈折性ポリマーを例に取り解説した。