Coherent light generators – Particular beam control device – Modulation
Patent
1996-07-26
1999-01-19
Scott, Jr., Leon
Coherent light generators
Particular beam control device
Modulation
372 12, 372 13, 372 22, 372 31, 372 32, 372 93, H01S 310
Patent
active
058621644
ABSTRACT:
An electro-optical apparatus transforms a single frequency, linearly polarized laser input beam (18) from a light source (10) into an output beam (36) having two collinear orthogonally polarized output beam components (32,33) differing in frequency from each other by the frequency of a stabilized electrical signal (40) provided from an electronic oscillator (38). The output of the oscillator (38) is provided to a power amplifier (42) which is used to drive a piezoelectric transducer (46) affixed to an acousto-optical Bragg cell (52) through which the input beam (18) passes and is transformed into the output beam (36) composed of two beam components (32,33). The electrical output (44) of the power amplifier (42) is adjusted so that each of the output beam components (32,33) has approximately a preselected fraction of the intensity of the input beam (18).
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Jr. Leon Scott
Kurland Lawrence G.
Zygo Corporation
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