Apparatus and method for producing visible coherent light at a p

Details Apparatus and method for producing visible coherent light at a p Apparatus and method for producing visible coherent light at a p

1978-08-21

1979-08-21

Rolinec, Rudolph V.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Multiaperture

H03F 700

Patent

active

041654692

ABSTRACT:
A pulsed solid state tunable laser comprises a Q-switched pump laser at kilohertz (kHz) pulse repetition frequencies and a non-centrosymmetric Raman crystal, such as lithium iodate (LiIO.sub.3), through which the pump beam is directed at an angle .theta. to the crystal optical axis. Stimulated Raman scattering (SRS) occurs in the crystal to produce Stokes lines at substantial average output powers, which lines react with the pump signal in the nonlinear crystal at predetermined values of .theta. to generate second harmonics (SHG) and sum frequencies (SFG) of the pump and Stokes lines which constitute visible light outputs. Changing the value of .theta. by rotating the crystal, for example, permits the apparatus to be step-tuned to phasematch the signals and produce visible light outputs at a plurality of wavelengths.

REFERENCES:
patent: 3536931 (1970-10-01), Boyd et al.
patent: 4048516 (1977-09-01), Ammann

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