Coherent light generators – Particular beam control device – Control of pulse characteristics
Patent
1989-09-07
1991-05-21
Sikes, William L.
Coherent light generators
Particular beam control device
Control of pulse characteristics
H01S 310
Patent
active
050181521
ABSTRACT:
A switched cavity laser system which includes a resonant cavity, a gain medium within the resonant cavity, a cavity switch and an output coupler. A controllable pump energy source delivers pump energy to the gain medium in response to an energy control signal. A detector is coupled with the gain medium and generates a detector signal in response to the amount of population inversion exhibited by the gain medium. A control circuit is coupled to the detector and controllable pump energy source for generating the energy control signal in response to the detector signal. As the switching rate of the Q-switch is varied, the energy control signal varies to ensure a constant level of population inversion between each pulse. In this matter, a prespecified pulse energy is achieved for each pulse independent of the switching rate of the Q-switch.
REFERENCES:
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patent: 4763975 (1988-08-01), Scifres et al.
patent: 4768198 (1988-08-01), Deki
patent: 4818062 (1989-04-01), Scifres et al.
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patent: 4856012 (1989-08-01), Takenaka
Spectra Physics, "Fiber Coupled Series Diode Pumped, Q-Switched Solid State Laser System", Dec. 1988.
Johnson Robert W.
Linne Mark A.
Thompson Richard G.
Sikes William L.
Spectra-Physics Inc.
Wise Robert E.
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