Coherent light generators – Particular active media – Semiconductor
Patent
1991-10-18
1993-04-06
Davie, James W.
Coherent light generators
Particular active media
Semiconductor
372 20, 372 45, 372 46, H01S 310
Patent
active
052009696
ABSTRACT:
A multiple wavelength semiconductor laser includes a plurality of layers, one or more of said layers comprising a carrier confinement (multiple quantum well) active region of the type wherein at least two confining regions (quantum wells) contained in the active region are formed such that one quantum level of a first region (quantum well) is at the same energy level as a different quantum level of a second region (quantum well). This alignment of the quantum levels between two confinement regions (quantum wells) results in the recombination of carriers from one region augmenting the recombination of carriers from the other region, the net effect being an output intensity at both shorter and longer wavelengths of operation more nearly equal than heretofore available. Appropriate placement of the regions within the laser waveguide also facilitates a matching of the output intensity profile with a desired output mode, e.g., the fundamental mode TE00.
REFERENCES:
patent: 4802182 (1989-01-01), Thornton
patent: 4817110 (1989-03-01), Tokuda et al.
patent: 4839899 (1989-06-01), Burnham et al.
patent: 4882734 (1989-11-01), Scifres et al.
patent: 4893353 (1990-01-01), Iwaoka et al.
patent: 4912526 (1990-03-01), Iwaoka et al.
patent: 4982408 (1991-01-01), Shimizu
patent: 4987468 (1991-01-01), Thornton
patent: 5048040 (1991-09-01), Paoli
patent: 5060235 (1991-10-01), Ikeda
Aiki et al., Frequency Multiplexing Light Source with Monolithically Integrated Distributed-Feedback Diode Lasers, Appl. Phys. Lett., vol. 29, No. 8, p. 506 (1976).
Holonyak et al., Quantum-Well Heterostructure Lasers, IEEE J. Quant. Elec., vol. QE-16, No. 2, p. 170, (1980).
Epler et al., Broadband Tuning (.DELTA.E.about.100 meV) of Al.sub.x Ga.sub.1-x As Quantum Well Heterostructure Lasers With An External Grating, Appl. Phys. Lett., vol. 43, No. 8, p. 740 (1983).
Tokuda et al., Emission Spectra of Single Quantum Well Lasers With Inhomogeneous Current Injection, J. Appl. Phys., vol. 64, No. 3, p. 1022 (1988).
Tokuda et al., Lasing Wavelength Of An Asymmetric Double Quantum Well Laser Diode, Appl. Phys. Lett., vol. 51, No. 4, p. 209 (1987).
Ikeda et al., Asymmetric Dual Quantum Well Laser-Wavelength Switching Controlled By Injection Current, Appl. Phys. Lett., vol. 55, No. 12, p. 1155 (1989).
Fang et al., Longitudinal Mode Behavior and Tunability of Separately Pumpted (GaAl)As Lasers, Appl. Phys. Lett., vol. 44, No. 1, p. 13 (1984).
Y. Arakawa and A. Yariv, Theory of Gain, Modulation Response, and Spectral Linewidth in AlGaAs Quantum Well Lasers, IEEE J. Quant. Elec., vol. QE-21, No. 10, p. 1666 (1985).
Asada et al., Gain and the Threshold of Three-Dimensional Quantum-Box Lasers, IEEE J. Quant. Elec., vol. QE-22, No. 9, p. 1915 (1986).
R. M. Kolbas and N. Holonyak, Jr., Man-Made Quantum Wells: A New Perspective on the Finite Square-well Problem, Am. J. Phys., vol. 52, No. 5, p. 431 (1984).
H. C. Casey and M. B. Panish in "Heterostructure Lasers: Part A", p. 193 (Academic Press, 1978).
J. Z. Wilcox et al., Dependence of Emission Wavelength on Cavity Length and Facet Reflectivities in Multiple Quantum Well Semiconductor Lasers, Appl. Phys. Lett., vol. 54, No. 22, p. 2174 (1989).
Stern et al., Fabrication of 20-nm Structures in GaAs, Appl. Phys. Lett., vol. 45, No. 4, p. 410 (1984).
Scherer et al., Fabrication of Microlasers and Microresonator Optical Switches, Appl. Phys. Lett., vol. 55, No. 26, p. 2724 (1989).
Simhony et al., Double Quantum Wire GaAs/AlGaAs Diode Lasers Grown By Organometallic Chemical Vapor Deposition On Grooved Substrates, IEEE Phot. Tech. Lett., vol. 2, No. 5, p. 305 (1990).
Davie James W.
Xerox Corporation
LandOfFree
Switchable multiple wavelength semiconductor laser does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Switchable multiple wavelength semiconductor laser, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Switchable multiple wavelength semiconductor laser will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-542031