Title:
【発明の名称】非線形半導体光学装置
Document Type and Number:
Japanese Patent JP3421341
Kind Code:
B2
Abstract:
A non-linear semiconductor optical device includes an active waveguide with a multiple quantum well construction in the active region. The device is supplied with a drive current at the material transparency current with respect to an optical pump. An optical non-linearity appears with respect to input radiation having a wavelength below that of the bandgap equivalent wavelength of the active region ( lambda < lambda g), the effect being achieved at relatively low optical input powers. The non-linearity is fast enough that a switching device incorporating the invention, in use as a demultiplexer, has potential to be used at bit rates approaching the Tbit/s range. In a demultiplexer embodiment, the non-linearity may be exploited in a directional coupler, an optical pump being used intermittently to control cross-over of an incoming TDM data signal so as to "pick off" a selected channel. Other applications include optical logic devices.
Inventors:
Fischer, Michael Andreya
Application Number:
JP50702194A
Publication Date:
June 30, 2003
Filing Date:
September 08, 1993
Export Citation:
Assignee:
British Telecommunications Public Limited Company
International Classes:
G02F1/017; G02F1/35; G02F1/355; G02F2/00; G02F1/225; G02F1/313; G02F3/00; G02F3/02; (IPC1-7): G02F1/35
Domestic Patent References:
| JP3154031A | ||||
| JP25027A |
Other References:
Ａｐｐｌ．Ｐｈｙｓ．Ｌｅｔｔ．，１９９１年，Ｖｏｌ．５９，Ｎｏ．６，６３５−６３７
Attorney, Agent or Firm:
Takehiko Suzue (3 outside)