Phase-shifted distributed feedback type semiconductor laser devi

Details Phase-shifted distributed feedback type semiconductor laser devi Phase-shifted distributed feedback type semiconductor laser devi

1991-06-11

1993-02-09

Epps, Georgia Y.

Coherent light generators

Particular resonant cavity

Distributed feedback

372 46, H01S 308

Patent

active

051857596

ABSTRACT:
A semiconductor laser device has a periodic structure for distributively feeding back light. A waveguide for guiding light along the periodic structure is provided. A plurality of waveguide regions having a light confinement coefficient set to vary along the periodic structure and an equivalent amount of phase shift with respect to the phase of the periodic structure set to an integer multiple of .pi. are provided. The total phase shifting amount of light by the waveguide is set to a value different from an integer multiple of .pi..

REFERENCES:
patent: 4726031 (1988-02-01), Wakao et al.
patent: 4802187 (1989-01-01), Bouley et al.
patent: 4847857 (1989-07-01), Ohkura
Electronics Letters, vol. 20, No. 24, pp. 1016-1018, Nov. 22, 1984, H. Soda, et al., "GalnAsP/1nP Phase-Adjusted Distributed Feedback Lasers With A Step-Like Non-Uniform Stripe Width Structure".
IEEE Journal of Quantum Electronics, vol. 24, No. 10, pp. 2017-2033, Oct. 1988, Y. Nakano, et al., "Analysis, Design, and Fabrication of GaAlAs/GaAs DFB Lasers With Modulated Stripe Width Structure For Complete Single Longitudinal Mode . . . ".
Eletronics Letters, vol. 20, No. 2, pp. 82-84, Jan. 19, 1984, K. Tada, et al., "Proposal Of A Distributed Feedback Laser With Nonuniform Stripe Width For Complete Single-Mode Oscillation".
Electronics Letters, vol. 24, 731-732; S. Ogita et al.; Jun. 1988 "Optimum Design for Multiple-Phase-Shift Distributed Feedback Laser".
Electronics Letters, 19th Jan. 1984, vol. 20, No. 2; pp. 80-81; "1.5 .mu.m Phase-Shifted DFB Lasers for Single-Mode Operation".
Electronics Letters, 19th Jan. 1984, vol. 20, No. 2; pp. 82-84; "Proposal of a Distributed Feedback Laser With Nonuniform Stripe Width for Complete Single-Mode Oscillation".

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