Optical waveguides – Integrated optical circuit
Patent
1990-07-24
1991-12-03
Ullah, Akm
Optical waveguides
Integrated optical circuit
372 50, H01S 319
Patent
active
050695614
ABSTRACT:
A monolithically integrated optical preamplifier comprises an amplifying region, an optical detection region for detecting amplified light, and an optically transparent and electrically insulating isolation region interposed between the amplifying and optical detection regions. The amplifying region achieves reduced facet reflectivity by being designed to have a large spot size, single-traverse mode waveguide amplifier oriented at an angle with respect to a crystal plane through the preamplifier. The isolation region is preferably an air gap.
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patent: 4805184 (1989-02-01), Fiddyment et al.
patent: 4823352 (1989-04-01), Sugimoto
patent: 4847665 (1989-07-01), Mand
patent: 4872180 (1989-10-01), Rideout et al.
patent: 4895615 (1990-01-01), Muschke
"Semiconductor Laser Optical Amplifiers for use in Future Fiber System" by O'Mahoney, Journal of Lightwave Tech., vol. 6, No. 4, Apr. 1988.
"Ultra-Low-Reflectivity Semiconductor Optical Amplifier Without Antireflection Coatings" by Rideout et al., Elec. Lettrs. 1/4/1990, vol. 26, No. 1.
"Monolithic Integration of 1.5 .mu.m Optical Preamplifier etc" by Wake et al., CPDP 18-2, pp. 636-637.
Marcuse, "Reflection Loss of Laser Mode from Tilted End Mirror", J. of Lightwave Tech., vol. 7, No. 2, Feb. 1989, IEEE.
Eichen Elliot
Holmstrom Roger P.
LaCourse Joanne
Lauer Robert B.
Powazinik William
GTE Laboratories Incorporated
Lohmann, III Victor F.
Ullah Akm
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