Continuously tunable wideband coherent infrared source

Details Continuously tunable wideband coherent infrared source Continuously tunable wideband coherent infrared source

1978-01-30

1980-04-29

Rolinec, Rudolph V.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Multiaperture

H03F 704

Patent

active

042008085

ABSTRACT:
Output coherent infrared radiation is obtained in a continuously tunable band from 1.4 microns to 25 microns and longer wavelengths. The 1.06 micron output of a Nd:YAG laser, or a harmonic thereof, is difference mixed in a nonlinear crystal, as of LiIO.sub.3 or LiNbO.sub.3 with a synchronously pumped output of a tunable dye laser oscillator to produce a first tunable output over the range of 0.7 micron to 5.0 microns. The output of the crystal mixer is amplified or difference mixed in a second nonlinear crystal mixer with the 1.06 pump output to produce an output tunable over the range of 1.4 microns to 25 microns and longer wavelengths. Suitable second crystal mixers comprise LiNbO.sub.3 for the range of 1.4 to 4.4 microns and operable as an amplifier in the range of 1.4 microns to 2.1 microns, and as a difference mixer in the range of 2.1 to 4.4 microns, AgGaS.sub.2 in the range of 4 microns to 12 microns and operating as a difference mixer, and CdSe operating as a difference mixer for the range of 12 microns to 25 microns.

REFERENCES:
patent: 4011462 (1977-03-01), Piltch et al.

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