Title:
【発明の名称】集積された波長同調可能な1段階及び2段階の純光学式波長変換器
Document Type and Number:
Japanese Patent JP2003510664
Kind Code:
A
Abstract:
A semiconductor tunable laser (10) and an interferometer (12) coupled to the tunable laser (10) are monolithically fabricated in a semiconductor heterostructure. The laser also comprises a buried ridge stripe waveguide laser. The interferometer (12) has a semiconductor optical amplifier (38) coupled in each arm. A cross-gain semiconductor optical amplifier converter is coupled to the interferometer (12). The semiconductor optical amplifier (38) coupled in each arm is biased so that an optical path length difference between the two arms is in antiphase which results in destructive interference. The output of the tunable laser (10) is coupled to a coupler. A semiconductor optical amplifier (38) is used as a gain controller for the semiconductor optical amplifiers in the interferometer (12) to allow wavelength conversion over a larger range of input signal powers. The heterostructure substrate comprises a low bandgap waveguide layer and thinner multi-quantum well active regions disposed above the low bandgap waveguide layer. The heterostructure substrate has nonabsorbing passive elements formed therein by selectively removing the quantum wells regions above the waveguide layer to allow formation of active and passive sections in the waveguide layer without having to perform a butt joint regrowth. The invention is also characterized as a method of fabricating an integrated optical device as disclosed above in the heterostructure substrate.
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Inventors:
Mason, Thomas, Gordon, Beck
Fish, Gregory, A.
Blumensar, Daniel, Jay.
Fish, Gregory, A.
Blumensar, Daniel, Jay.
Application Number:
JP2001527410A
Publication Date:
March 18, 2003
Filing Date:
September 28, 2000
Export Citation:
Assignee:
The Regents of the University of California
International Classes:
G02F2/02; G02F2/00; H01S5/026; H01S5/042; H01S5/062; H01S5/125; H01S5/34; H04B10/145; H01S5/00; H01S5/0625; H01S5/227; H01S5/50; (IPC1-7): G02F2/02; H01S5/026; H01S5/062; H01S5/125; H01S5/34
Domestic Patent References:
| JPH08334796A | 1996-12-17 | |||
| JPH08307014A | 1996-11-22 | |||
| JPH1126882A | 1999-01-29 | |||
| JPH1062730A | 1998-03-06 | |||
| JPH07153933A | 1995-06-16 | |||
| JPH1174599A | 1999-03-16 | |||
| JPH1187853A | 1999-03-30 |
Attorney, Agent or Firm:
Atsushi Nakajima (2 outside)