Amplitude modulator for a high powered beam of infrared radiatio

Details Amplitude modulator for a high powered beam of infrared radiatio Amplitude modulator for a high powered beam of infrared radiatio

1981-09-21

1985-04-09

Sikes, William L.

Coherent light generators

Particular component circuitry

Optical pumping

350354, 372 31, 372 34, 372 26, G02F 111

Patent

active

045098298

ABSTRACT:
A method and device for amplitude modulating a high powered beam of infrared radiation at frequencies in the megahertz range are disclosed. A laser is used to generate a beam of 4-40 watts of power and the beam is passed through as acousto-optical crystal having an acoustic transducer on one surface. A standing acoustical wave in the crystal is provided by a low powered drive signal at a frequency of one to ten megahertz. The beam is efficiently modulated by the standing wave at exactly twice the frequency of the drive signal. The device incorporates a heat sinking arrangement which serves to preclude deleterious action of divergent acoustical waves generated in the crystal, as well as to provide excellent removal of thermal energy.

REFERENCES:
patent: 3964825 (1976-06-01), Eschler

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