Coherent light generators – Particular resonant cavity – Distributed feedback
Reexamination Certificate
2006-06-20
2006-06-20
Menefee, James (Department: 2828)
Coherent light generators
Particular resonant cavity
Distributed feedback
C372S050110
Reexamination Certificate
active
07065123
ABSTRACT:
First and second diffraction grating layers are provided above a semiconductor substrate, and are spaced from each other in an output direction of a beam with a flat connecting layer sandwiched therebetween. An active layer is disposed above or below the first and second diffraction grating layers and the connecting layer. A cladding layer is disposed above the active layer or above the first and second diffraction grating layers and the connecting layer. A diffraction grating including the first and second diffraction grating layers has a plurality of slits penetrating from an upper surface to a lower surface that are perpendicular to the output direction of the beam. The connecting layer is formed from two layers grown epitaxially in a direction perpendicular to the output direction of the beam. One of the two layers is formed of the same material as the first and second diffraction grating layers.
REFERENCES:
patent: 5020072 (1991-05-01), Abe et al.
patent: 5274660 (1993-12-01), Abe
patent: 5960023 (1999-09-01), Takahashi
patent: 6608855 (2003-08-01), Hwang et al.
patent: 0 533 485 (1993-03-01), None
patent: 0 732 783 (1996-09-01), None
patent: 60-192378 (1985-09-01), None
patent: 4-111383 (1992-04-01), None
patent: 9-307179 (1997-11-01), None
patent: 9-312437 (1997-12-01), None
patent: 2000-58961 (2000-02-01), None
Nilsson S. et al., “Improved Spectral Characteristics of MQW-DFB Lasers by Incorporation of Multiple Phase-Shifts” Journal of Lightwave Technology, IEEE. New York, US, vol. 13, No. 3, Mar. 1, 1995, pp. 434-441, XP000509308, ISSN: 0733-8724.
Nilsson S. et al., “DFB Laser with Nonuniform Coupling Coefficient Realized by Double-Layer Buried Grating” IEEE Photonics Technology Letters, IEEE Inc. New York, US, vol. 5, No. 10, Oct. 1, 1993, pp. 1128-1131, XP000414197, ISSN: 1041-1135.
Fujita Motoaki
Kikugawa Tomoyuki
Mori Hiroshi
Takahashi Yoshio
Anritsu Corporation
Frishauf Holtz Goodman & Chick P.C.
Menefee James
LandOfFree
Distributed feedback semiconductor laser for outputting beam... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Distributed feedback semiconductor laser for outputting beam..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Distributed feedback semiconductor laser for outputting beam... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3648674