Coherent light generators – Particular active media – Semiconductor
Patent
1992-10-19
1994-08-30
Bovernick, Rodney B.
Coherent light generators
Particular active media
Semiconductor
372 46, H01S 315
Patent
active
053434862
ABSTRACT:
According to this invention, a semiconductor laser device includes a compound semiconductor substrate, a double hetero structure formed on the compound semiconductor substrate and having an active layer and first and second cladding layers which interpose the active layer, a current blocking region formed in one facet portion of the double hetero structure in a resonator direction. A reflecting layer is arranged on the other facet of the double hetero structure in the resonator direction and has a reflectance higher than that of a natural cleavage surface, thereby shifting the oscillation wavelength of the laser device to a long wavelength side with respect to the wavelength of spontaneous radiation emitted from one facet of the double hetero structure.
REFERENCES:
patent: 4653059 (1987-03-01), Akiba et al.
patent: 4941148 (1990-07-01), Yoshida et al.
Yonezu, et al., IEEE Journal of Quantum Electronics, vol. QE-15, No. 8, Aug. 1979, pp. 775-781. "An AIGaAs Window Structure Laser".
Soviet Technical Physics Letters, vol. 14, No. 2, Feb. 1988, pp. 119-121, K. Yu. Kizhaev, et al., "Lasing in InGaAsP/InP Distributed-Feedback Lasers with a Large Difference Between the Bragg Wavelength and the Gain Maximum of the Active Layer".
Electronic Letters, vol. 27, No. 8, Apr. 11, 1991, pp. 661-662, H. Hamada, et al., "High-Power Operation of 630nm-Band Transverse-Mode Stabilised AlGAInP Laser Diodes with Current-Blocking Region Near Facets".
Electronics Letters, vol. 26, No. 20, Sep. 27, 1990, pp. 1726-1728, Y. Ueno, et al., "Continuous-Wave High-Power (75mW) Operation of a Transverse-Mode Stabilised Window-Structure 680nm AlGaInP Visibile Laser Diode".
Patent Abstracts of Japan, vol. 15, No. 351 (E-1108), Sep. 5, 1991, JP-A-31 36 388.
Hatakoshi Gen-ichi
Itaya Kazuhiko
Nitta Koichi
Bovernick Rodney B.
Kabushiki Kaisha Toshiba
Wise Robert E.
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