Coherent light generators – Particular active media – Semiconductor
Patent
1990-03-30
1991-10-22
Epps, Georgia
Coherent light generators
Particular active media
Semiconductor
372 23, 372 50, H01S 319
Patent
active
050602357
ABSTRACT:
A semiconductor laser element selectively emitting lights differing in corresponding quantized energy from each other comprises a substrate, a laser resonator provided on the substrate and having end surfaces opposed to each other, the resonator comprising semiconductor layers including an active layer of quantum well structure and laminated on the substrate, and a plurality of electrodes juxtaposed in the direction of resonance of the resonator, the electrodes independently applying an electric current into the active layer, the end surface loss of the resonator being set so that a light corresponding to greater quantized energy may be oscillated when electric currents are applied at equal densities from the plurality of electrodes into the active layer and that a light corresponding to smaller quantized energy may be oscillated when electric currents are poured at different densities from the plurality of electrodes into the active layer.
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patent: 4788689 (1988-11-01), Tokuda et al.
patent: 4817110 (1989-03-01), Takuda et al.
patent: 4896328 (1990-01-01), Sekiyuchi et al.
patent: 4930132 (1990-05-01), Shimizu et al.
patent: 4993036 (1991-02-01), Imeda et al.
Canon Kabushiki Kaisha
Epps Georgia
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