Hybrid semiconductor laser/detectors

Details Hybrid semiconductor laser/detectors Hybrid semiconductor laser/detectors

1979-04-30

1981-10-27

Davie, James W.

Oscillators

Molecular or particle resonant type

331 945H, 357 19, H01S 319

Patent

active

042976537

ABSTRACT:
A semiconductor injection laser is mounted on a silicon substrate. An optical detector in the form of a Schottky barrier is integral to the substrate and aligned to detect a portion of the light from one of the light emitting facets of the laser. The detector is connected to the current control circuit for the laser to provide a feedback signal which is proportional to the light deflected from the facet. The feedback signal provides an input to the control circuit to adjust the operating current of the laser to provide a predetermined and maintained optical power output level. Means are provided for enhancing light collecting efficiency. The connection of the laser and detector to the control circuit is accomplished in a manner so that the operating current of the laser does not electrically interfere with the electrical operation of the detector. The control circuit may be provided on the substrate employing VLSI technology.

REFERENCES:
patent: 3842263 (1974-10-01), Kornrumpf et al.
patent: 3855546 (1974-12-01), Carr
patent: 4058821 (1977-11-01), Miyoshi et al.
patent: 4074143 (1978-02-01), Rokos
patent: 4079404 (1978-03-01), Comerford et al.
patent: 4092614 (1978-05-01), Sakuma et al.
patent: 4137543 (1979-01-01), Beneking
patent: 4156206 (1979-05-01), Comerford et al.
J. D. Crow et al., "Gallium Arsenide Laser-Array-on-Silicon Package," Applied Optics, vol. 17, No. 3, pp. 479-485, Feb. 1, 1978.

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