Short pulse laser

Details Short pulse laser Short pulse laser

1982-10-05

1984-10-16

Sikes, William L.

Coherent light generators

Particular beam control device

Control of pulse characteristics

372 9, 372 30, 350393, 350386, H01S 310

Patent

active

044779054

ABSTRACT:
The width of the output pulse of a Q-switched cavity dump laser is substantially reduced by rapidly discharging a high voltage across the cavity dump crystal with an electro-optical switch which is closed by regenerative feedback from the optical output of the laser. The switch comprises a semiconductor body in intimate contact with the cavity dump crystal and has electrodes spaced by a small gap which control discharge of the high voltage across the crystal. A small fraction of the laser output is fed back to the switch and regeneratively creates a d-c current in the semiconductor body across the gap to accelerate closure of the switch and discharge of the voltage across the crystal to produce an extremely narrow output pulse.

REFERENCES:
Mourou et al.; "High-Power Switching with Picosecond Precision", Appl. Phys. Lett. 35 (7), Oct. 1, 1979.
Lee; "Picosecond Optoelectronic Switching in GaAs"; Appl. Phys. Lett. vol. 30, No. 2, Jan 15, 1977.
LeFur et al.; "A Kilovolt Picosecond Optoelectronic Switch and Pockel's Cell"; Appl. Phys. Lett. vol. 28, No. 1, Jan. 1, 1976.
Feldman; "Ultralinear Bistable Electro-Optic Polarization Modulator," Appl. Phys. Lett. 33 (3), Aug. 1, 1978.
"Agostinelli et al.; "Active Pulse Shaping in the Picosecond Domain"; Appl. Phys. Lett. 35 (10), Nov. 15, 1979.

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