Coherent light generators – Particular active media – Semiconductor
Patent
1995-02-14
1996-10-01
Davie, James W.
Coherent light generators
Particular active media
Semiconductor
372 26, 372 46, 372 96, H01S 310, H01S 319
Patent
active
055616828
ABSTRACT:
A semiconductor optical device fabricating method for easily fabricating on a single substrate a plurality of distributed feedback lasers or distributed Bragg reflector lasers with uniform static and dynamic properties and individually different oscillation wavelengths. A plurality of pairs of stripe type insulating thin film masks are formed over that region of the semiconductor substrate which has optical waveguides formed therein for the lasers. Each pair of stripe type masks has a constant gap therebetween. With the masks in place, optical waveguide layers for the lasers are grown in crystallized fashion through metal organic vapor epitaxy. The stripe type masks in pairs differ dimensionally from one another. The semiconductor optical device thus fabricated comprises on one semiconductor substrate a plurality of distributed feedback lasers or distributed Bragg reflector lasers whose optical waveguide layers differ in both film thickness and composition and whose oscillation wavelengths also differ from one another.
REFERENCES:
patent: 5384797 (1995-01-01), Welch et al.
patent: 5412678 (1995-05-01), Treat et al.
patent: 5465263 (1995-11-01), Bour et al.
Monolithic Integrated Multi-wavelength DFB Laser Arrays and Star Couplers WDM Lightwave Systems by Chung-En Zah and Tien Pei Lee, Optics & Photonics News, Mar. 1993, pp. 24-26.
Lasing Wavelength Control for DBR Lasers Using Selective MOVPE Growth, Prior Art (2) (No Date).
Aoki Masahiro
Suzuki Makoto
Taniwatari Tsuyoshi
Tsutsui Takayuki
Davie James W.
Hitachi , Ltd.
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