Acoustooptic modulation device capable of avoiding impedance mis

Details Acoustooptic modulation device capable of avoiding impedance mis Acoustooptic modulation device capable of avoiding impedance mis

1988-02-02

1989-06-27

Moskowitz, Nelson

Modulators

Amplitude modulator

Nonlinear device controlled by modulating signal

350355, 350358, G02F 133, G02B 518, G02B 2710

Patent

active

048433357

ABSTRACT:
In an acoustooptic modulation device, a plurality of split light beams are produced from a beam splitter in response to a single incident light beam and projected onto partial modulators comprising acoustooptic mediums and transducers attached to the mediums, respectively. The transducers have different thicknesses to vary input impedances of the respective partial modulators and are supplied from an electric signal circuit with modulated electric signals falling within frequency bands different from one another, respectively. Preferably, modulated light beams are produced from the partial modulators through an optical system to be focussed into a predetermined geometric arrangement. The beam splitter may be a body having a pair of parallel surfaces covered with reflection and semitransparent layers, a diffraction grating, or a fiber grating.

REFERENCES:
patent: 4696551 (1987-09-01), Amano et al.

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