Presentations -

マルチメディア社会を支えるフォトニクスポリマー

KOIKE YASUHIRO

第8回理工学部科学技術セミナー (横浜) , 

1997.11

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Oral presentation (invited, special)

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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。

High-Speed Polymer Optical Fiber and Related Photonics Polymer

KOIKE YASUHIRO

Organic Thin Films for Photonics Applications (California, USA) , 

1997.10

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Oral presentation (invited, special), American Chemical Society Optical Society of America

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Recent progress of the polymer optical fiber (POF) and related photonics polymers for high-speed telecommunication is reviewed. The high-bandwidth perfluorinated GI POF, which has no serious absorption loss from visible to 1.3µm wavelength, is proposed as a promising candidate for "the last one mile."

Recent Progress of Plastic Optical Fiber in High-Speed Telecommunication

KOIKE YASUHIRO, ISHIGURETAKAAKI, SATOH MASATAKA, NIHEI EISUKE

The 4th Optical Fibre Measurement Conference (OFMC'97) (Teddington, UK) , 

1997.09

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Oral presentation (invited, special)

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Recent progress of the graded-index polymer optical fiber (GI POF) is reviewed. The low-loss perfluorinated (PF) polymer based GI POF experimentally achieved 3 GHz for 100m transmission in the range of visible to near infrared region. In addition, improvement of the thermal and long-term stability of the bandwidth of GI POF with using a new dopant material is described.

Progress of Low-Loss GI Polymer Optical Fiber from Visible to 1.5μm Wavelength

KOIKE YASUHIRO, ISHIGURE TAKAAKI

11th International Conference on Integrated Optics and Optical Fiber Communications, 23rd European Conference on Optical Communications, (IOOC-ECOC'97) (Edinburgh, UK) , 

1997.09

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Oral presentation (invited, special), The Institute of Electorical Enigineers

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The progress of GI polymer optical fiber (GI POF) for high-speed data communication is reviewed. It was experimentally confirmed that the gigabit data transmission for several hundred meter at 1.3-µm wavelength was enabled by the low-loss perfluorinated (PF) polymer based GI POF. We described an impotance in thermal stability and long-term reliability of the GI POF which is one of the key issue in order to realize the high-speed POF network. We believed that these progress of low-loss PF polymer based GI POF have triggered the realization of the high-speed POF network.

Material Design of Graded-Index Type Optical Polymer

NIHEI EISUKE, KOIKE YASUHIRO

日本化学会第73回秋季年次大会、科学関係学協会連合協議会研究発表会、連合討論会、合同大会 (盛岡) , 

1997.09

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Oral presentation (invited, special), 社団法人　日本化学会 科学関係学協会連合協議会

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Refractive index varies continiously within an inhomogeneous medium. Currentry the term "Graded Index" abbreviated to GI, is often used to describe such media. Such GI Materials desplay unique and useful optical properties that are not achieved by conventional optical materials with a constant refractive index. Many applications for GI materials have been reported for lenses and optical fiber communications.
For example, all commercially available optical fiber's (POF's) have been of the step index (SI) type whose bandwodth is about 5MHz/km due to the modal dispersion. In contrast, the bandwidth of Gi POF is two hundred times as large as SI POF, so it will be able to cover the required bandwidth of tne high speed multimedia network.

GI POF in High-Speed Telcommunication

KOIKE YASUHIRO

POF Conference'97 (Kauai, Hawaii) , 

1997.09

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Oral presentation (invited, special), Office of Naval Research, Asian Office POF Consortium

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The progress of the GI polymer optical fiber (GI POF) for high-speed teltcommunication is reviewed. It was experimentally confirmed that the gigabit data transmission for several hundred meter from visible to 1.3µm wavelength was enabled by the low-loss perfluorinated (PF) polymer base GI POF. We also described an importance in the thermal stability and long-term reliability of the GI POF. We believe that these progresses of GI POF have triggered the realization of the high-speed POF network.

High-Speed Polymer Optical Fiber Network

KOIKE YASUHIRO

Korea-Japan Joint Forum'97 Organic Materials for Electronics and Photonics (KJF'97) (Kwangju, Korea) , 

1997.09

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Oral presentation (invited, special), Kwanguju Institution of Science and technology, (K-JIST)

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The status of the polymer optical fiber (POF) for high-speed data communication is reviewed. Recently, the low-loss and high-bandwidth perfluorinated GI POF which has no serious absorption loss from visible to near infreared region was successfully prepared at Keio University. Since the core diameter (300-1000µm) of the GI POF is much larger than that of the multimode silica fiber (62.5 µm),the serious modal noise in the conventional multimode silica fiber was virtually eliminated, resulting in stable giga bit order data transmission with inexpensive couplers and connectors.

Recent Progress in High-Speed Polymer Optical Fiber

KOIKE YASUHIRO

The 8th International Conference on Unconventional Photoactive Systems (UPS-8) (Nara, Japan) , 

1997.08

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Oral presentation (invited, special)

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Recent Progress of the graded-index polymer optical fiber (GI POF) is reviewed. The low-loss perfluorinated (PF) polymer based GI-POF experimentally achieved gigabit transmission for more than 200m in the range of visible to near infrared region. In addition, improvement of the thermal and long-term stability of the bandwodth of the GI POF with using a new dopant material is described.

高速マルチメディアを支えるフォトニクスポリマー

KOIKE YASUHIRO

第8回若手技術者と学生のためのレーザー応用セミナー (Tokyo) , 

1997.07

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Oral presentation (invited, special), 社団法人　レーザー学会　東京支部

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マルチメディアにおける広帯域屈折率分布型ポリマー光ファイバーの可能性を具体的に述べた。

High-Speed Photonics Polymer and its Application

KOIKE YASUHIRO, ISHIGURE TAKAAKI, SATOU MASATAKA, NIHEI EISUKE

Topical Meeting of the European Optical Society, 11th Conference on Materials for Nonlinear Optics, 1997 (Capri, Italy) , 

1997.07

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Oral presentation (invited, special), the European Optical Society

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Recent progress of the graded-index polymer optical fiber (GI POF) is reviewed. The loe-loss perfluorinate (PF) polymer based GI POF experimentally achieved gigabit transmission for more than 100m in the range of visible to near infrared region. In addition, improvement of the thermal and long-term stability of the bandwidth of hte GI POF with using a new material is described.

Recent Development of Polymer Optical Fiber for High-Speed Data Comuunication

KOIKE YASUHIRO, NIHEI EISUKE, ISHIGURE TAKAAKI

2nd Optoelectronics & Communications Conference (OECC'97) (Seoul, Korea) , 

1997.07

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Oral presentation (invited, special), Optical Society of korea Korea Institute of Telematics and Electronics Korea Institute of Communication Sciences Korean Institute of Electrical Engineers

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Recent progress of the graded-index polymer optical fiber (GI POF) is reviewed. The low-loss perfluorinated (PF) polymer based GI POF experimentally achieved 3 GHz for 100m transmission in the range of visible to near infrared region. Also improvement of the thermal and long-term stability of the bandwidth of the GI POF with using a new dopant material is descrived.

高速プラスチック光ファイバー

KOIKE YASUHIRO

第71回光・量子科学技術フォーラム、応用光学懇談会第101回講演会 (大阪) , 

1997.05

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Oral presentation (invited, special), 財団法人　大阪科学技術センター 応用光学懇談会

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ＧＩ－ＰＯＦを提案した。ＧＩ型ＰＯＦは材料がポリマーであるために大口径化が可能であることから、接続・分岐が容易であり、かつＧＩ型にすることにより広帯域が実現可能となる。また、フッ素化合物を用いることにより、1.3ミクロン帯でも良好な透明性が得られたのでその結果についても解説した。

Photonics Polymer for Multimedia Society

KOIKE YASUHIRO

化学への招待 (Yokohama) , 

1997.03

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Oral presentation (invited, special), 社団法人　日本化学会　関東支部

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マルチメディア社会で用いることの可能な屈折率分布型ポリマー光ファイバーの作製方法とその特性

高速通信のためのプラスチック光ファイバ

KOIKE YASUHIRO

平成８年度第２回ＫＡＳＴ科学技術セミナー ＫＡＳＴサイエンスフォーラム1997 ー光の科学と技術ー (川崎) , 

1997.03

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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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マルチメディアネットワークをターゲットにした屈折率分布型ポリマー光ファイバーの構造と特性を解説した。

Plastic Optical fiber : Recent Topics.

KOIKE YASUHIRO

第67回微小光学研究会 (東京) , 

1997.03

, 

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

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Recentry, Information services become available to the general households, and the broadband network has been demannded to deliver video services with low cost and easy handling.
Under such circumstances, plastic optical fiber (OPF) has benn attracting much attention as one of the candidates for transmission medium ofthe high-speed information communication network system. The POF can be prepared with a large core diameter because of the high flexibility, which would enable easy connection and branching in the network system. Moreover, realization of high bandwodth can be achieved by making a graded-index type.
In this thesis, we report on the recent study on high-speed POF.

Dream of Plastic Optical Fiber

KOIKE YAUSHIRO

International Optp-Electronics Symposium The 130th Committee on Opto-Electronics, JSPS (東京) , 

1997.03

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Oral presentation (invited, special), 日本学術振興会

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　Recently, information services which can be represented by the internet service have become available to general housholds, and a braodband network has bee demanded to deliver video services which low cost and easy handling.
Under such circumstances, plastic optical fiber (POF) became remarkable as the transmission medium of the high-speed information communication network system. The POF can be prepared with a large core diameter because of ihgh-flexibility, which would enable easy connection and branching in the network system. Moreover, realization of high-bandwodth can be achieved by making a graded-index type.
In this paper, we report on the development of POF and dreams of POF.

Plastic Fibers

KOIKE YASUHIRO

Optical Fiber Communication Conference and Exhibit, (OFC'97) (Dallas, Texas, USA) , 

1997.02

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

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光通信関連学会の中での最大の学会といわれるOFCにおいて、無機ガラス系光ファイバーによる長距離光ネットワークに対して、POFによる短距離高速光リンクを提案し、更にガラス光ファイバーリンクとの融合について提案した。

Emerging Photonics Polymer and Its Status.

KOIKE YASUHIRO

Toho 21st Century Forum (静岡) , 

1997.01

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Oral presentation (invited, special)

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光情報分野で利用可能な様々なポリマー素子の解説。

High-Speed Photonics Polymer -Transmission and Display-

KOIKE YASUHIRO

4th International Conference on Frontiers of Plymers and Advanced Materials, (ICFPAM) (Cairo, Arab Republic of Egypt) , 

1997.01

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Oral presentation (invited, special)

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マルチメディア時代を担うと思われる、光信号の伝送、及びその表示機能として、高速伝送ポリマー光ファイバー、さらに光散乱導光体による高輝度LCDバックライトについて報告した。

Low-Loss, High-Bandwidth POF in Visible to Near-IR Region

KOIKE YASUHIRO

POF Asia-Pacific Forum '96 (Tokyo, Japan) , 

1996.12

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Oral presentation (invited, special), POF Consortium

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全フッ素化材料を用いることにより、近赤外領域で50dB/kmまで低伝送損失化された新規GI型POFの特性について報告し、このGI型POFを用いた新たな光リンクシステムを提案した。