Distributed feedback semiconductor laser of continuously tunable

Details Distributed feedback semiconductor laser of continuously tunable Distributed feedback semiconductor laser of continuously tunable

1987-05-05

1989-01-31

Davie, James W.

Coherent light generators

Particular resonant cavity

Distributed feedback

372 20, 372 46, 372 50, H01S 319

Patent

active

048021873

ABSTRACT:
A distributed feedback semiconductor laser comprising a substrate and, on such substrate, a double heterostructure formed by a confinement layer, an active layer, a guiding layer engraved to form a diffraction network, the active layer and the guiding layer being engraved to form a ribbon having a certain width and a certain thickness and a central portion of larger width and thickness, a metal electrode surmounting the assembly and enabling charges to be injected through the ribbon, wherein the metal electrode comprises two distinct portions forming a first electrode disposed above the central widened or thickened portion of the ribbon, the first electrode being connected to a first connection for the injection of a first current and a second electrode disposed above the rest of the ribbon and connected to a second connection for the injection of a second current.

REFERENCES:
patent: 4726031 (1988-02-01), Wakao et al.
Patent Abstract of Japan, vol. 7, No. 174 (E-190-1319) 2.8.83 and JP-A-58-78488 (Kokusia Denshi Denwa K.K.).
Electronics Letters, vol. 20, No. 23, Nov. 1984, pp. 957-959, Staines, Middlesex, G.B.; L. D. Westbrook et al.
Patent Abstract of Japan, vol. 9, 201 (E-336-1924), 17.8.85 and JP-A-60-66490 (Nippon Denki K.K.).
Electronics Letters, vol. 21, No. 2, 17.1.1985, pp. 63-65, Staines, Middlesex, G.B., M. Yamaguchi et al.
Electronics Letters, vol. 20, No. 24, 22.11.1984, pp. 1016-1018, Staines, Middlesex, G. B., H. Soda et al.

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