Coherent light generators – Particular active media – Semiconductor
Reexamination Certificate
2011-05-17
2011-05-17
Rodriguez, Armando (Department: 2828)
Coherent light generators
Particular active media
Semiconductor
C372S004000, C372S050220
Reexamination Certificate
active
07944959
ABSTRACT:
A quantum cascade laser amplifier (12) having an active zone (20) includes a stack of raw layers of semi-conductor materials formed in an epitaxial manner on a substrate layer (16) of indium. phosphide (InP) or gallium arsenide (GaAs) bearing the active zone (20), and a vertical anti-reflection coating (34) that covers an outlet face (28) of the laser radiation made of materials having given refraction indices and a predetermined thickness so that the entire laser radiation can flow through the outlet face. The anti-reflection coating (34) includes a first layer (36) having a first predetermined retraction index (n1) lower than the predetermined refraction index (nD), and at least a second layer (38) having a second refraction index (n2) higher than the predetermined refraction index (nD), wherein the first layer (36) of the anti-reflection coating (34) is made of yttrium fluoride (YF3).
REFERENCES:
patent: 2004/0042520 (2004-03-01), Shigihara et al.
patent: 2004/0161009 (2004-08-01), Edamura et al.
patent: 0 845 819 (1998-06-01), None
patent: 1 195 865 (2002-04-01), None
patent: 2000-58884 (2000-02-01), None
Richard Maulini et al., “Continuous-wave operation of a broadly tunable thermoelectrically cooled external cavity quantum-cascade Iaser”, Optics Letters, OSA, Optical Society of America, Washington, DC, US, vol. 30, No. 19, Oct. 1, 2005, ISSN: 01495-9592, XP001235357, pp. 258, left-hand column—p. 2584 left-hand column, pp. 2584-2596.
G. P. Luo et al., “Grating-tuned external-cavity quantum-cascade semiconductor lasers”, Applied Physics Letters, AIP American Institute of Physics, Melville, NY, USA, vol. 78, No. 19, May 7, 2001, ISSN: 0003-6951, XP012027922, pp. 2834-2836.
A. V. Vanyakin, et al., “Interference optics for laser and parametric oscillators emitting in the middle-IR range”, Quantum Electronics, vol. 27, No. 2, Feb. 1997, XP009083667, pp. 137-139.
Li Da-Qui et al., “Design and Fabrication of 6.4-15um Broadband Antireflection Coatings”, Journal of Infrared and Millimeter Waves, vol. 25, No. 2, Apr. 2006, XP009083554, pp. 135-137.
International Search Report dated Apr. 11, 2008, from corresponding PCT application.
Blaser Stephane
Faist Jerome
Maulini Richard
Alpes Lasers SA
Rodriguez Armando
Young & Thompson
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