Room-temperature, laser diode-pumped, q-switched, 2 micron, thul

Details Room-temperature, laser diode-pumped, q-switched, 2 micron, thul Room-temperature, laser diode-pumped, q-switched, 2 micron, thul

1990-03-30

1990-10-23

Scott, Jr., Leon

Coherent light generators

Short wavelength laser

372 12, 372 13, 372 39, 372 69, 372 72, 372 98, 372 41, H01S 330

Patent

active

049658034

ABSTRACT:
A room-temperature, laser-pumped, Q-switched, thulium-doped, solid state laser for producing pulses of laser emission at substantially 2 microns is disclosed. In a preferred embodiment, the laser comprises: a laser cavity defined by first and second reflective elements opposing each other on a common axis to form a reflective path therebetween; a laser crystal disposed in the laser cavity, the laser crystal having a host material doped with an amount of thulium activator ions sufficient to produce a laser emission at substantially 2 microns from the .sup.3 F.sub.4 to .sup.3 H.sub.6 laser transition in the thulium activator ions when the laser crystal is enabled and is pumped by a CW pump beam at a preselected wavelength; a pump laser for pumping the laser crystal with the CW pump beam at the preselected wavelength; and a Q-switch disposed in the laser cavity between the laser crystal and the second reflective element for periodically enabling the laser crystal to produce a pulsed laesr emission at substantially 2 microns when the laser crystal is also pumped by the CW pump beam.

REFERENCES:
patent: 3949319 (1976-04-01), Tofield et al.
patent: 3972007 (1976-07-01), Naiman et al.
patent: 4044315 (1977-08-01), Snitzer
patent: 4321559 (1982-03-01), Esterowitz et al.
patent: 4701928 (1987-10-01), Fan
Allen et al., "Diode-Pumped 2 .mu.m Holmium Laser", Elect. Lett V. 22(1), 947, 23 May 1986.

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