Semiconductor laser system

Details Semiconductor laser system Semiconductor laser system

1995-12-11

1997-04-08

Bovernick, Rodney B.

Coherent light generators

Particular active media

Semiconductor

372 24, 369 4437, 257 88, H01S 302

Patent

active

056195214

ABSTRACT:
A semiconductor laser system for use in an optical pickup is provided which allows the optical pickup to dispense with an expensive optical component such as a beam splitter and to assure accurate tracking sero and focusing servo functions using the SCOOP method, and which includes at least three light-emitting parts formed on one chip and respectively adapted to emit laser beams in a same direction, wherein light-emitting faces of at least two of the light-emitting parts form a step therebetween in the direction in which the laser beams are emitted, and wherein at least two, different in combination from the at least two of the light-emitting parts, of the light-emitting parts are located offset to each other in a direction perpendicular to a plane defined by the direction and the at least two of the light-emitting parts forming the step, while the light-emitting faces of which lie in a plane perpendicular to the direction in which the laser beam are emitted.

REFERENCES:
patent: 4744070 (1988-05-01), Takemura et al.
patent: 4847848 (1989-07-01), Inoue et al.
"Full-Wafer Technology --A New Approach to Large-Scale Laser Fabrication and Integration"; Peter Vettiger et al., IEEE Journal of Quantum Electronics, vol. 27, No. 6, Jun. 1991.
"Voltage Change Across the Self-Coupled Semiconductor Laser"; Yoshinobu Mitsuhashi et al., IEEE Journal of Quantum Electronics, vol. QE-17, No. 7, Jul. 1981.

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