Coherent light generators – Particular active media – Plural active media or active media having plural dopants
Patent
1990-03-29
1991-03-05
Gonzalez, Frank
Coherent light generators
Particular active media
Plural active media or active media having plural dopants
372 15, 372 21, 372 97, 372 99, 350486, H01S 3082
Patent
active
049982591
ABSTRACT:
A laser oscillator system which transmits laser input beam pulses through a olarizer onto the surface of a rotating mirror which routes the laser beam pulses sequentially into a plurality of stationary phase conjugate amplifiers. The pulse repetition frequency of the oscillator input beam pulses is much higher than any one of the amplifiers can handle without overheating. The amplifiers are positioned in a circle around the laser oscillator axis. The polarizer and rotating mirror are positioned on the oscillator axis. The mirror is synchronized with the input beam pulses so that each subsequent input beam pulse enters the next amplifier in sequence. Each phase conjugate amplifier has associated therewith a quarter-wave plate and a phase conjugate mirror at its output. The phase conjugate mirror is preferably comprised of a focusing lens and a stimulated Brillouin scattering cell. The cell retroreflects the once amplified beam pulse back through the quarter-wave plate, which has now rotated the beam pulse polarization through 90.degree.. Each pulse is amplified a second time and is reflected off the mirror and the back of the polarizer and out of the laser system. The laser system makes possible the handling of a large pulse repetition frequency of amplified output laser beam pulses.
REFERENCES:
patent: 3310753 (1967-03-01), Burkhalter
patent: 3541468 (1970-11-01), Hammond, Jr. et al.
patent: 3701048 (1972-10-01), Jennings, Jr.
patent: 3924937 (1975-12-01), Munroe et al.
patent: 4682340 (1987-07-01), Dave et al.
patent: 4734911 (1989-03-01), Bruesselbach
Chandra Suresh
Daunt Geraldine H.
Gonzalez Frank
Hansen Galen J.
Harwell Max L.
Lane Anthony T.
Lee Milton W.
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