Coherent light generators – Particular active media – Semiconductor
Reexamination Certificate
2007-09-11
2007-09-11
Nguyen, Dung (Michael) T. (Department: 2828)
Coherent light generators
Particular active media
Semiconductor
C372S044010
Reexamination Certificate
active
10379027
ABSTRACT:
A high powered laser diode that includes a pumped stripe section with a varying index of refraction. The varying index of refraction can reduce the self-focusing phenomenon found in high powered laser diodes in the prior art, thereby providing a high quality output beam. The index of refraction can vary from one side of the pumped stripe section to the other side of the pumped stripe section. The index can be varied by varying a structural characteristic of the pumped stripe section such as the doping or thickness of the layers within the laser diode. A thermal gradient can be created across the pumped stripe section to vary the index of refraction. The thermal gradient can be created by integrating a heating element along one side of the pumped stripe section or creating unequal current flow through the pumped stripe section.
REFERENCES:
patent: 4249142 (1981-02-01), Burnham et al.
patent: 4433417 (1984-02-01), Burnham et al.
patent: 4694459 (1987-09-01), Burnham et al.
patent: 4791648 (1988-12-01), Vojak et al.
patent: 4965806 (1990-10-01), Ashby et al.
patent: 5337328 (1994-08-01), Lang et al.
patent: 5644584 (1997-07-01), Nam et al.
patent: 6122299 (2000-09-01), DeMars et al.
patent: 6389199 (2002-05-01), Eldada et al.
patent: 6421363 (2002-07-01), Osinski et al.
patent: 6556611 (2003-04-01), DiMarco et al.
patent: 197 17 545 (1998-09-01), None
patent: 63 096988 (1988-04-01), None
patent: WO99/66614 (1999-12-01), None
McInerney J. et al., “High brightness semiconductor lasers with reduced filamentation”, LEOS 99. IEEE Laser & Electro-Optics Society Nov. 1999, vol. 1, 8, pp. 78-79.
Lindsey C et al: “Tailored-Gain Broad-Area Semiconductor Laser . . . ”, Electronics Letters, IEE Stevenage, GB, vol. 21, No. 16, Aug. 1, 1985, pp. 671-673.
Irell & Manella LLP
Nguyen Dung (Michael) T.
Quintessence Photonics Corporation
Yorks Ben J.
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