Coherent light generators – Particular resonant cavity – Distributed feedback
Reexamination Certificate
2005-04-26
2005-04-26
Wong, Don (Department: 2828)
Coherent light generators
Particular resonant cavity
Distributed feedback
C372S045013
Reexamination Certificate
active
06885690
ABSTRACT:
A vertical cavity surface emitting laser (VCSEL) having asymmetrical optical confinement is described. Polarization of VCSELs having symmetrical structures tend to be unpredictable and switchable. The VCSEL of the present invention has a dielectric stack on top of the emitting distributed Bragg mirror. The stack is made up of two or more layers of dielectric material with each alternate layer having one of two different refractive indexes. In a preferred embodiment an antireflective coating is between the top mirror and the dielectric layers. The stack is preferably smaller than the emitting aperture.
REFERENCES:
patent: 5115441 (1992-05-01), Kopf et al.
patent: 5940422 (1999-08-01), Johnson
patent: 5953362 (1999-09-01), Pamulapati et al.
patent: 5995531 (1999-11-01), Gaw et al.
patent: 6002705 (1999-12-01), Thornton
patent: 6055262 (2000-04-01), Cox et al.
patent: 6154479 (2000-11-01), Yoshikawa et al.
patent: 6185241 (2001-02-01), Sun
patent: 6188711 (2001-02-01), Corzine et al.
patent: 6339496 (2002-01-01), Koley et al.
patent: 20020080836 (2002-06-01), Hwang
patent: 20020191659 (2002-12-01), Skogman
patent: 20030006407 (2003-01-01), Taylor
patent: 19945128 (1981-08-01), None
patent: 2349739 (1999-11-01), None
patent: WO 0045483 (2000-08-01), None
K. Panajotov, B. Nagler, G. Verschaffelt, A. Georgievski, M. Thienpont, J. Danckaert, and I. Veretenicoff; Impact of in-plane anisotropic strain on the polarization behavior of vertical-cavity surface-emitting lasers; Published Jul. 15, 2000; 3 Pages;vol. 77, No. 11; 2000 American Institute of Physics; Brussels, Belgium.
Strelecka et al., “Single Mode, Low Impedance 850-nm VCSELs Integrated Mode Filters”, Digest of the LEOS Summer Topical Meetings, 2001, Aug. 2001, pp. 51-52.
Aggerstam Thomas
Wurtemberg Rickard von
Laubshcer, Jr. Lawrence E.
Vy Hung T
Wong Don
Zarlink Semiconductor AB
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