Method and apparatus to dynamically control the resonator gain o

Coherent light generators – Particular operating compensation means

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372 31, 372 38, 372 25, 372 10, H01S 300

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052048675

ABSTRACT:
A method or apparatus for controlling the output pulse of a Q-switched laser. The intensity of laser light within the resonator of a Q-switch laser is sensed. A reference pulse related to a desired laser output pulse shape is compared with the sensed intensity. A variation signal corresponding to differences between the sensed light intensity and the reference pulse is fed to a Pockels cell or Q-switch within the resonator. The Q-switch responds to the variation signal by altering the resonator laser light polarization to maintain the Q-switch laser's output pulse in the desired shape. The reference pulse may be dynamically altered to change the shape of the output pulse.

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Harigel et al., "Pulse Stretching in a Q-Switched Ruby Laser for Bubble Chamber Holography", Applied Optics, vol. 25, No. 22, Nov. 15, 1986, pp. 4102-4110.
Schmid, "Pulse Stretching in a Q-Switched Nd:YAG Laser", IEEE Journal of Quantum Electronics, vol. QE-16, No. 7, Jul. 1980, pp. 790-794.

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