Method and apparatus for generating ultra-short individual laser

Details Method and apparatus for generating ultra-short individual laser Method and apparatus for generating ultra-short individual laser

1979-09-27

1984-10-23

Sikes, William L.

Coherent light generators

Particular beam control device

Control of pulse characteristics

372 96, 372 53, 372102, 372 10, H01S 310

Patent

active

044792204

ABSTRACT:
Ultra-short individual laser pulses, having a half-amplitude duration of 100 picoseconds or less and a recurrence frequency of one Hz to one mHz are generated in a self Q-switching distributed feedback dye laser that employs a high density diffraction grating as a beam divider, dividing a primary beam from a pulsed pump laser into two excitation beams of +1 and -1 order; the excitation beams are directed, by two reversing mirrors, to impinge upon a focal line in a dye solution serving as an active laser medium. The pulses of the primary beam have a half-amplitude duration many times greater than 100 psec but no greater than 20 nsec, and the beam intensity is such that the stimulation of the dye does not exceed its laser threshold by more than 20%.

REFERENCES:
patent: 3675157 (1972-07-01), Kaminow et al.
patent: 4208637 (1980-06-01), Matsuda et al.
"Integrated Optics Devices Utilizing Thick Phase Gratings", by Kenan et al, ptical Engineering, vol. 15, No. 1, pp. 12-16, Jan.-Feb. 1976.
Tunable DFB Laser with Fan-Shaped Grating", by Matsuda et al, Appl. Phys. Lett., vol. 31, No. 2, Jul. 15, 1977.

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