Laser light sources

Details Laser light sources Laser light sources

1983-02-03

1985-12-03

Sikes, William L.

Coherent light generators

Particular beam control device

Modulation

372 18, 372 20, 372 29, 372 70, H01S 310

Patent

active

045569800

ABSTRACT:
A light source comprises a semiconductor laser and a gas laser. The semiconductor laser is injection locked using the highly coherent output from the gas laser. The output from the semiconductor laser has a narrow linewidth and a high stability.
The invention has a major application in optical fibre communications systems.

REFERENCES:
patent: 3999146 (1976-12-01), Lang et al.
Abramov et al., "Use of a Servoconductor Laser Diode as a Modulator of Gas Laser Radiation"; Sov. Jour. of Quant. Electronics, vol. 2, No. 3, Sep.-Oct. '72.
Reinhart; "Reverse-Biased Gallium Phosphide Diodes as High Frequency Light Modulators"; J. Appl. Phys. vol. 39, No. 7, pp. 3426-3434, Jun. 1968.
Paoli et al.; "Optical Pulses from CW GaAs Injection Lasers"; Appl. Phys. Lett. vol. 15, No. 3, 1 Aug. '69.
"Improvements in Intensity Fluctuation Noise of a 1 Gbit/s-Modulated InGaAsP Laser by a Light Injection Technique" Yamada, Jap. J. of App. Physics, vol. 19, No. 11, Nov. 1980, pp. L689-L692.
"Modulated Single-Longitudinal Mode Semiconductor Laser and Fiber Transmission Characteristics at 1.55 .mu.m", Yamada, IEEE J. of Quantum Electronics, vol. QE-17, No. 6, Jun. 1981.
"Single Mode Operation of 500 Mbit/s Modulated AlGaAs Semiconductor Laser by Injection Locking", S. Kobayashi et al., Electronics Letters, Sep. 11, 1980, vol. 16, No. 19.
"Receiver Performance Evaluation of Various Digital Optical Modulation-Demodulation Systems in the 0.5-10 .mu.m Wavelength Region", Yamamoto, IEEE Journal of Quantum Electronics, vol. QE-16, No. 11, Nov. 1980, pp. 1251-1259.
"Megahertz Linewidth from A 1-5 .mu.m Semiconductor Laser with HeNe Laser Injection", Wyatt, R., 8030 Electronics Letter, vol. 18, No. 7, Apr. 1982.

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