Coherent light generators – Particular active media – Semiconductor
Reexamination Certificate
2011-05-03
2011-05-03
Harvey, Minsun (Department: 2828)
Coherent light generators
Particular active media
Semiconductor
C372S043010, C372S050110
Reexamination Certificate
active
07936801
ABSTRACT:
An objective of the present invention is to provide a surface emitting laser capable of selectively generating a laser oscillation in the fundamental mode and thereby emitting a single-wavelength laser light. In a surface emitting laser including an active layer and a two-dimensional photonic crystal provided on one side of the active layer, a reflector45or46is provided at least at a portion of the circumference of the two-dimensional photonic crystal. The reflector has a reflectance distribution in which the reflectance has a maximum value at a position where the amplitude envelope of the fundamental mode of an internal resonance light created within the two-dimensional photonic crystal. This design strengthens the fundamental mode while suppressing the second mode, thus enabling the laser oscillation in the fundamental mode to be selectively obtained, so that a single-wavelength laser light can be emitted.
REFERENCES:
patent: 6853669 (2005-02-01), Simpson et al.
patent: 2003/0235229 (2003-12-01), Deng et al.
patent: A-2000-332351 (2000-11-01), None
patent: A-2001-308457 (2001-11-01), None
patent: A-2003-273456 (2003-09-01), None
Sakai et al.; “Lasing Band-Edge Identification for a Surface-Emitting Photonic Crystal Laser;”IEEE Journal on Selected Areas in Communications; Jul. 2005; pp. 1335-1340; vol. 23, No. 7.
Ohnishi et al.; “Room temperature continuous wave operation of a surface-emitting two-dimensional photonic crystal diode laser;”Optics Express; Apr. 19, 2004; pp. 1562-1568; vol. 12, No. 8.
Kunishi Wataru
Miyai Eiji
Noda Susumu
Ohnishi Dai
Sakai Kyosuke
Harvey Minsun
Kyoto University
Niu Xnning
Oliff & Berridg,e PLC
Rohm & Co., Ltd.
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