Method and circuit for controlling the evolution time interval o

Details Method and circuit for controlling the evolution time interval o Method and circuit for controlling the evolution time interval o

1989-05-31

1992-07-07

Sikes, William L.

Coherent light generators

Particular beam control device

Control of pulse characteristics

372 30, H01S 310

Patent

active

051289490

ABSTRACT:
The invention, a method and circuit for controlling the evolution time interval of a laser output pulse, comprises means for pumping a laser medium 13 in a resonator 10 that includes a Q-switch 22 and polarizer 26 that act in combination to control the loss in the resonator 10. A photodiode 11 senses the resulting fluorescence 12 which is applied to a two level Q-switch driver 27 the output of which selectively adjusts the level of loss in the Q-switch 22 and polarizer 26 from high to intermediate to substantially zero loss states to control the evolution time interval of the resulting laser output pulse.

REFERENCES:
Koechner, Solid State Laser Engineering, pp. 426-431, Jan. 1976.
Optics Communications, vol. 65, No. 4, (Feb. 1988), pp. 283-286.
IEEE Journal of Quantum Electronics, vol. QE-17, No. 9 (Sep. 1981), pp. 1656.

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