Coherent light generators – Particular beam control device – Nonlinear device
Patent
1982-05-20
1985-01-08
Davie, James W.
Coherent light generators
Particular beam control device
Nonlinear device
372 70, 372 99, H01S 300, H01S 3091
Patent
active
044930860
ABSTRACT:
Laser apparatus is disclosed which employs the principles of phase conjugation to provide for short-pulse operation. A phase-conjugate reflector, lasing medium, and output coupling device are arranged to form a laser resonator. The lasing medium may be pumped by a conventional pump source to produce population inversion in the lasing medium. The phase-conjugate reflector is pulsed by means of a pulsed pump source which applies a periodic train of short laser pulses having high peak power and low average power thereto. The short-duration pulses create high reflective efficiencies in the phase-conjugate reflector, while minimizing the overall energy demands on the system. Additionally, the pump source which pumps the lasing medium may also provide pulsed energy thereto which is synchronous with the pulsed energy provided by the pulsed pump source to the phase-conjugate reflector. Accordingly, the system provides for a series of short pulsewidth laser pulses at its output.
REFERENCES:
patent: 4233571 (1980-11-01), Wang et al.
Giuliano, "Applications of Optical Phase Conjugation", Physics Today, Apr. 1981.
Jain et al., "High-Efficiency Degenerate Four-Wave Mixing of 1.06 .mu.m Radiation in Silicon", Optics Letters, vol. 4, No. 10, Oct. 1979, pp. 328-330.
Jain et al., "Generation of Synchronized CW Trains of Picosecond Pulses at Two Independently Tunable Wavelengths", Appl. Phys. Lett. 32 (1), Jan. 1978, pp. 41-44.
Lind et al., "Demonstration of the Longitudinal Modes . . . Phase-Conjugate Mirror", Optics Letters, vol. 6, Nov. 1981, pp. 554-556.
Giuliano Concetto R.
Jain Ravinder K.
Collins David W.
Davie James W.
Hughes Aircraft Company
Karambelas Anthony W.
Ogrod Gregory D.
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