Title:
【発明の名称】光信号処理方法および光学素子
Document Type and Number:
Japanese Patent JP2678362
Kind Code:
B2
Abstract:
An optical device for use as an optical filter or modulator comprises an optical waveguide (2) including a portion (1) having a refractive index that varies with optical intensity and means (5,7,30,40,8) for providing and directing at least two coherent waves (3,4) at that portion such that a standing wave of a modulated refractive index is established by interference between the coherent waves. The standing wave provides a temporary modulated index grating in the waveguide. Variation of the angular separation of the waves tunes the wavelength sensitivity of the grating. The device may be used for modulation of WDM optical signals in the waveguide.
Inventors:
Cassidy Stefan Anthony
Application Number:
JP50436187A
Publication Date:
November 17, 1997
Filing Date:
July 17, 1987
Export Citation:
Assignee:
British Telecommunications Public Limited Company
International Classes:
G02F1/01; G02F1/29; G02F1/31; G02F1/313; G02F1/35; G02F2/02; H04J14/00; H04J14/02; (IPC1-7): G02F1/35; H04B10/02
Domestic Patent References:
| JP58211744A |
Other References:
Ａｐｐｌｉｅｄ Ｐｈｙｓｉｃｓ Ｌｅｔｔｅｒｓ 第３２巻，第１０号，Ｐ．Ｐ．６４７−６４８
Ｓｏｖｉｅｔ Ｊｏｕｒｎａｌ ｏｆ Ｑｎａｎｔｕｍ Ｅｌｅｃｔｒｏｎｉｃｓ 第１２巻 第４号 Ｐ．Ｐ．４１８−４２１
Ｓｏｖｉｅｔ Ｊｏｕｒｎａｌ ｏｆ Ｑｎａｎｔｕｍ Ｅｌｅｃｔｒｏｎｉｃｓ 第１２巻 第４号 Ｐ．Ｐ．４１８−４２１
Attorney, Agent or Firm:
Naotaka Ide