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

1991-10-17

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

051630613

ABSTRACT:
A chromium doped solid-state high peak-power laser transmitter emits at a 4861.342 or 4340.50 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 peak-power 6924.51 Angstrom R2 line output is frequency doubled to 3462.26 Angstrom and hydrogen Raman down-shifted 8310 cm.sup.-1 to the second-Stokes at 4861.342 Angstrom to produce said high peak-power output centered on the 4861.342 Angstrom hydrogen-beta Fraunhofer line. Optionally, a temperture tuned 6927.00 Angstrom R2 line laser oscillator wavelength from the pink ruby gain medium doped with approximately 0.05% chromium ion relies on frequency doubling the R2 line at 6927.00 Angstrom to 3462.26 Angstrom and a methane Raman down-shifting of the 3462.26 Angstrom by 5832 cm.sup.-1 to the second-Stokes at 4340.50 Angstrom to produce said emission centered on the 4340.5 Angstrom hydrogen Fraunhofer line.

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