Multiple quantum well distributed feedback semiconductor laser d

Details Multiple quantum well distributed feedback semiconductor laser d Multiple quantum well distributed feedback semiconductor laser d

1993-12-22

1995-09-12

Davie, James W.

Coherent light generators

Particular resonant cavity

Distributed feedback

372 45, 372 46, 437129, H01S 319, H01S 308

Patent

active

054504376

ABSTRACT:
A distributed feedback semiconductor laser device having a semiconductor substrate, a bottom electrode formed on a bottom surface of the substrate, a corrugation-shaped grating formed on a top surface of the substrate, an active waveguide layer whose energy band gap profile and whose light propagation constant are varied along a cavity length direction of the laser device, the active waveguide layer being formed over the corrugation-shaped grating, a clad layer formed to cover the active waveguide layer, and a top electrode formed on a top of the clad layer. The active waveguide layer is grown by a selective metal organic vapor phase epitaxy with use of slender insulation masks having a variation in width, the slender insulation masks being arranged at both sides of an area on which the active waveguide layer is grown.

REFERENCES:
patent: 5321716 (1994-06-01), Kinoshita et al.
By M. Kuznetsov et al., "Frequency modulation response of tunable two-segment distributed feedback lasers", Appl. Phys. Lett., Oct. 30, 1989, vol. 55, No. 8, pp. 1826-1828.
By M. Okai et al., "Ultra-narrow spectral linewidth (56 kHz) corrugation-pitch-modulated multi-quantum-well distributed feedback lasers", IEEE Photonics Technol. Lett., 1990, vol. 2, No. 8, pp. 529-530 (No month for reference).
By S. Ogita et al., "FM Response of Narrow-Linewidth, Multielectrode .lambda./4 Shift DFB Laser", IEEE Photonics Technology Letters, Mar. 1990, vol. 2, No. 3, pp. 165-166.
By K. Lau, "Frequency modulation and linewidth of gain-levered two-section single quantum well lasers", Appl. Phys. Lett., Nov. 12, 1990, vol. 57, No. 20, pp. 2068-2070.
By M. Kitamura et al., "High-Performance 1.5 .mu.m Multiple-Quantum-Well DFB-DC-PBH-LD's at mW Output Power for Gb/s Range Coherent Systems", IEEE Photonics Technology Letters, Apr. 1991, vol. 3, No. 4, pp. 305-307.
By M. Okai, "Tunable DFB lasers with ultra-narrow spectral linewidth", Fourth Optoelectronics Conference (Dec. '92) Technical Digest, Jul. 1992, pp. 58-59.

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