Amplifiers – Parametric amplifiers – Semiconductor type
Patent
1990-03-16
1991-05-14
Moskowitz, Nelson
Amplifiers
Parametric amplifiers
Semiconductor type
372 48, 372 49, H01S 319, H01S 323
Patent
active
050159640
ABSTRACT:
A semiconductor travelling wave optical amplifier in presented in a new configuration. An amplifier chip (20) has the rear facet (23) provided with a reflective coating. Optical signals are input and amplified signals are output via optical fibers (21, 35, 30) and directional coupler (24). A single fiber-to-amplifier alignment is required between fibre tail (25) and the front facet (22) is provided with a very low reflectivity coating. In this configuration the amplification is increased in comparison with the conventional in-line amplifier configuration.
REFERENCES:
patent: 3365671 (1968-01-01), Kogelnik
patent: 3943462 (1976-03-01), Thompson
patent: 4270834 (1988-01-01), Yamamoto et al.
patent: 4731792 (1988-03-01), Shimizu et al.
patent: 4789881 (1988-12-01), Alphonse
patent: 4896195 (1990-01-01), Larsen et al.
British Telecom Technology Journal, vol. 4, No. 2, Apr. 1986.
100C-BCOC 1985 Venice, "Semiconductor Laser Amplifiers as Repeaters".
Electronics Letters 3 Jan. 1985, vol. 21, No. 1, pp. 33-35.
Electronics Letters 23 May 1985, vol. 21, No. 11, pp. 501-502.
British Telecom Technology Journal, vol. 3, No. 3, Jul. 1985.
Third International COnference on Telecommunication Transmission London, 99 159-161.
Mukai et al., "S/N and Error Rate Performance in AlGaAs Semiconductor Laser Preamplifier and Linear Repeater Systems", IEEE Journal of Quantum Electronics, vol. QE-18, No. 10, 9 pp., Oct. 1982.
Ikeda, "Switching Characteristics of Laser Diode Switch", IEEE Journal of Quantum Electronics, vol. QE-19, No. 2, 8 pp., Feb. 1983.
Fye, Donald M., "Practical Limitations on Optical Amplifier Performance", Journal of Lightwave Technology, vol. LT-2, No. 4, New York, USA, Aug. 1984.
Mukai et al., "Gain, Frequency Bandwidth, and Saturation Output Power of AlGaAs DH Laser Amplifiers", IEEE Journal of Quantum Electronics, vol. QE-17, No. 6, Jun. 1981;
Eisenstein, G. et al., "Gain Measurements of InGaAsP 1.5 .mu.m Optical Amplifiers, " Electronic Letters, vol. 21, No. 23, 7 Nov. 1985.
Westlake, H. J. et al., "Measurement of Optical Bistability in an InGaAsP Laser Amplifier at 1.5 .mu.m, " Electronics Letters, vol. 21, No. 21, 10 Oct. 1985.
British Telecommunications public limited company
Moskowitz Nelson
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