Title:
OPTICAL FUNCTIONAL ELEMENT
Document Type and Number:
Japanese Patent JP3507659
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain an element with which an optical signal can be delayed with a small installation space and the functions of various optically functional materials can be effectively exhibited by utilizing the delay and refractive index control, by setting the wavelength of light corresponding to the end of a photonic band to the neighborhood of the wavelength of light to be transmitted.
SOLUTION: The element has a structure in which materials different in refractive index (or dielectric constant) are periodically arranged so that the photonic band is formed and the wavelength of light corresponding to the end of the photonic band is set to the neighborhood of the wavelength of light to be transmitted. For example, this optical functional element has two diffraction gratings 21 which are arranged by facing each other, are formed with metallic films 22 on its surface respectively, form the phtonic band and an optically functional film 23 which is held between these diffraction gratings 21. This element is used not only as an optical delay element in optical communication but also in a case or others where plural light pulses are optically mixed by combining the group velocity thereof, and small installation space meets the requirement as well.
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Inventors:
Kenji Miyakodori
Shuji Hayase
Toshiro Hiraoka
Shuji Hayase
Toshiro Hiraoka
Application Number:
JP14915797A
Publication Date:
March 15, 2004
Filing Date:
June 06, 1997
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
G02B6/00; G02B5/18; G02B6/02; G02B6/10; G02B6/12; G02F1/01; G02F1/35; H01S3/10; H01S3/16; (IPC1-7): G02F1/35; G02B5/18; G02B6/00; G02B6/10; G02F1/01; H01S3/10; H01S3/16
Domestic Patent References:
| JP7159609A | ||||
| JP4241486A |
Other References:
Ｊ．Ｐ．Ｄｏｗｌｉｎｇ，Ｃ．Ｍ．Ｂｏｗｄｅｎ，ＡＮＯＭＡＬＯＵＳ ＩＮＤＥＸ ＯＦ ＲＥＦＲＡＣＴＩＯＮ ＩＮ ＰＨＯＴＯＮＩＣ ＢＡＮＤＧＡＰ ＭＡＴＥＲＩＡＬＳ，Ｊｏｕｒｎａｌ ｏｆ Ｍｏｄｅｒｎ Ｏｐｔｉｃｓ，１９９４年，ｖｏｌ．４１，ｎｏ．２，ｐｐ．３４５−３５１
Ｋｅｎｎｅｔｈ Ｏ．Ｈｉｌｌ，ブラッググレーティング・ファイバデバイス，ＯＰＴＲＯＮＩＣＳ，１９９５年，第１３５−１４１ページ
迫田和彰、大高一雄，フォトニック結晶中の非線形光学過程，「量子位相エレクトロニクス」平成７年度研究成果報告書（研修成果報告会論文集），日本，１９９６年 ２月 １日，第９５−１００ページ
Ｋｅｎｎｅｔｈ Ｏ．Ｈｉｌｌ，ブラッググレーティング・ファイバデバイス，ＯＰＴＲＯＮＩＣＳ，１９９５年，第１３５−１４１ページ
迫田和彰、大高一雄，フォトニック結晶中の非線形光学過程，「量子位相エレクトロニクス」平成７年度研究成果報告書（研修成果報告会論文集），日本，１９９６年 ２月 １日，第９５−１００ページ
Attorney, Agent or Firm:
Takehiko Suzue (6 outside)