Coherent light generators – Particular resonant cavity – Distributed feedback
Patent
1995-09-08
1997-04-08
Bovernick, Rodney B.
Coherent light generators
Particular resonant cavity
Distributed feedback
372 46, 372102, H01S 318
Patent
active
056195230
ABSTRACT:
A distributed-feed back semiconductor laser diode comprises a substrate of n-type conductivity GaAs having a pair of opposed surfaces, a pair of sides and a pair of ends. In sequence on one of the opposed surfaces are a first clad layer of n-type conductivity graded AlGaAs; a first confining layer of undoped AlGaAs; a first quantum well layer of undoped GaAs; a barrier layer of undoped AlGaAs; a second quantum well layer of undoped GaAs; a second confining layer of undoped AlGaAs; a spacer layer of p-type conductivity graded AlGaAs; a plurality of spaced, parallel grating bars of p-type conductivity AlGaAs extending across the spacer layer parallel to the ends of the substrate; a second clad layer of p-type conductivity graded AlGaAs over and between the grating bars; and contact layer of p+ type conductivity GaAs. A first conductive contact layer contacts the contact layer and a second conductive contact layer is on the other opposed surface of the substrate. The dual quantum well layers of undoped GaAs provide a laser diode which emits visible radiation at a wavelength less than 880 nm.
REFERENCES:
patent: 5170405 (1992-12-01), Connolly et al.
patent: 5295150 (1994-03-01), Vangieson et al.
A. Takemoto et al., "1.3-um Distributed Feedback Laser Diode with a Grating Accurately Controlled by a New Fabrication Technique", Journal of Lightwave Technology, vol. 1, No.1 12, Dec., 1989, pp. 2072-2076.
P. York et al., "MOCVD Regrowth over GaAS/AlGaAs Grating for High Power Long-Lived InGaAs/AlGaAs Lasers", Sixth International Conference on Metalorganic Vapor Phase Epitaxy, Cambridge, MA, 1992 (no month available) .
Abeles Joseph H.
Connolly John C.
Morris Nancy A.
Bovernick Rodney B.
Burke William J.
David Sarnoff Research Center Inc.
Song Yisun
LandOfFree
Semiconductor distributed feedback laser diode does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Semiconductor distributed feedback laser diode, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Semiconductor distributed feedback laser diode will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2401863