Coherent light generators – Particular resonant cavity – Distributed feedback
Patent
1995-10-31
1998-03-10
Healy, Brian
Coherent light generators
Particular resonant cavity
Distributed feedback
372 19, 372108, H01S 319
Patent
active
057270147
ABSTRACT:
A vertical-cavity surface-emitting laser that generates light having a fixed direction of polarization. The laser has a plane light-generating region sandwiched between a first conductive mirror region and a second conductive mirror region. The first conductive mirror region has an opposite conductivity mode from the second conductive mirror region. The first conductive mirror region has a remote surface substantially parallel to the light-generating region and an electrode formed on the remote surface. The electrode bounds a light emission port from which the light is emitted in a direction defining an axis. A reduced-conductivity region is formed in the first conductive mirror region surrounding the axis and extending from the remote surface towards the light-emitting region to define a core region in the first conductive mirror region. The light emission port and/or the core region has first and second dimensions in orthogonal directions in a plane parallel to the light-generating region. The first dimension is greater than the second dimension to set the direction of polarization of the light to the direction of the first dimension.
REFERENCES:
patent: 4474422 (1984-10-01), Kitamura
patent: 5416044 (1995-05-01), Chino et al.
T. Wipiejewski et al., "Characterization of Two-Sided Output Veritcal-Cavity Laser Diodes by External Optical Feedback Modulation", Proceedings of the Lasers and Electro-Optics Society Annual Meeting, San Jose, California, Nov. 15-18 1993, pp. 564-565.
Kent D. Choquette et al., "Control of Vertical-Cavity Laser Polarization with Anisotropic Transverse Cavity Geometries", IEEE Photonics Technology Letters, vol. 6, No. 1, 1 Jan. 1994, pp. 40-42.
T. Mukaihara et al., "Engineered Polarization Control of GaAS/AlGaAs Surface-Emitting Lsers by Anisotropic Stress from Elliptical Etched Substrate Hole", IEEE Photonics Technology Letters, vol. 5, No. 2, Feb. 1993, pp. 133-135.
T. Yoshikawa et al., "Complete Polarization Control of 8X8 Vertical-Cavity Surface-Emitting Laser Matrix Arrays", Applied Physics Letters, vol. 66, No. 8, Feb. 20, 1995, pp. 908-910.
Corzine Scott W.
Ertel John P.
Holland William D.
Tan Michael R. T.
Wang Shih-Yuan
Hardcastle Ian
Healy Brian
Hewlett--Packard Company
Song Yisun
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