Method of frequency shifting using a chromium doped laser transm

Details Method of frequency shifting using a chromium doped laser transm Method of frequency shifting using a chromium doped laser transm

1991-10-16

1992-11-10

Healy, Brian

Coherent light generators

Particular beam control device

Having particular beam control circuit component

372 3, 372 20, 372 34, 372 55, 372 90, 372 98, 372108, 359334, H01S 330

Patent

active

051630621

ABSTRACT:
A chromium doped solid-state high peak-power laser transmitter emits at a 4861.342 or 4340.5 Angstrom Fraunhofer line, lines of peak blue-seawater transmission and minimum solar radiation. A pink ruby gain medium doped with approximately 0.05% chromium ion is temperature tuned to an R2 line at 6924.51 Angstrom wavelength and an R1 line is dispersively suppressed in a laser oscillator cavity also tuned to 6924.51 Angstrom. The oscillator is Q-switched and the amplified high peaked-power 6924.51 Angstrom output is hydrogen Raman shifted to the first-Stokes at 9722.684 Angstrom which is frequency doubled to produce a high peak-power output at 4861.342 Angstrom hydrogen-beta Fraunhofer line. Optionally, a temperature tuned R2 line at 6927.00 Angstrom wavelength from the pink ruby gain medium doped with approximately 0.05% chromium ion is Raman shifted 2916 cm.sup.-1 in methane to the first-Stokes at 8681.0 Angstrom. Next, the first-Stokes at 8681.0 Angstrom is frequency doubled to the 4340.5 Angstrom hydrogen Fraunhofer line.

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