Distributed feedback semiconductor laser

Details Distributed feedback semiconductor laser Distributed feedback semiconductor laser

1986-12-16

1989-05-23

Sikes, William L.

Coherent light generators

Particular resonant cavity

Distributed feedback

372 18, 372 46, H01S 308

Patent

active

048336874

ABSTRACT:
A distributed feedback semiconductor laser is provided with an optical waveguide having first and second straight-bar portions and a bending portion. The pitch of the grating in the case of light passing through the bending portion is a little longer than that in the case of light passing through the first and second straight-bar portion in order to shift the phase of the light transmitted along the optical waveguide by .lambda./4 where .lambda. is the oscillation wavelength, thereby generating single longitudinal mode laser light.

REFERENCES:
patent: 4163976 (1979-08-01), Matsumoto
patent: 4178064 (1979-12-01), Nakamura et al.
patent: 4302729 (1981-11-01), Burnham et al.
patent: 4518219 (1985-05-01), Leonberger et al.
patent: 4716570 (1987-12-01), Yoshida et al.
Matsumoto, "Bent Guide Structure Semiconductor Lasers", Jul.-Aug. 1978, pp. 1027-1044; Review of the Electrical Communication Laboratories.

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