Coherent light generators – Particular resonant cavity – Specified cavity component
Reexamination Certificate
2006-12-27
2009-11-17
Harvey, Minsun (Department: 2828)
Coherent light generators
Particular resonant cavity
Specified cavity component
C372S043010, C372S050110, C372S096000, C372S099000
Reexamination Certificate
active
07620093
ABSTRACT:
A semiconductor laser has first and second diffractive grating regions. The first diffractive grating region has segments, has a gain, and has first discrete peaks of a reflection spectrum. The second diffractive grating region has segments combined to each other, and has second discrete peaks of a reflection spectrum. Each segment has a diffractive grating and a space region. Pitches of the diffractive grating are substantially equal to each other. A wavelength interval of the second discrete peaks is different from that of the first discrete peaks. A part of a given peak of the first discrete peaks is overlapped with that of the second discrete peaks when a relationship between the given peaks of the first discrete peaks and the second discrete peaks changes. A first segment located in the first diffractive grating region or the second diffractive grating region has an optical length shorter or longer than the other segments of the first diffractive grating region and the second diffractive grating region by odd multiple of half of the pitch of the diffractive grating of the first diffractive grating region.
REFERENCES:
patent: 5600743 (1997-02-01), Hillmer
patent: 6411642 (2002-06-01), Mazed
patent: 6608855 (2003-08-01), Hwang et al.
patent: 7130124 (2006-10-01), Ketterson et al.
patent: 2003/0128724 (2003-07-01), Morthier
patent: 2004/0057484 (2004-03-01), Aoyagi et al.
patent: 2004/0218639 (2004-11-01), Oh et al.
patent: 44 32 410 (1996-03-01), None
patent: 2-105488 (1990-04-01), None
patent: 11-150324 (1999-06-01), None
S. L. Woodward, et al., “A DBR Laser Tunable by Resistive Heating”, IEEE Photonics Technology Letters, IEEE Service Center, Piscataway, NJ, US, vol. 4, No. 12, Dec. 1, 1992, pp. 1330-1332.
European Search Report dated May 3, 2007, Application No. 06127181.3-2222.
Eudyna Devices Inc.
Harvey Minsun
Niu Xnning
Westerman Hattori Daniels & Adrian LLP
LandOfFree
Laser device, laser module, semiconductor laser and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Laser device, laser module, semiconductor laser and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laser device, laser module, semiconductor laser and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4073343