Optical: systems and elements – Optical modulator – Light wave temporal modulation
Patent
1996-09-09
1998-01-27
Ben, Loha
Optical: systems and elements
Optical modulator
Light wave temporal modulation
359305, G02F 111
Patent
active
057127220
ABSTRACT:
A system for electronically powering an acoustooptic device. A radio-frequency (RF) generator supplies RF drive power at a drive carrier frequency. A signal source delivers a modulating signal. An RF modulator modulates the RF drive power with the modulating signal. Two compensating RF power generators supply high-frequency and low-frequency compensating power at frequencies greater than and less than the drive carrier frequency. Operational amplifiers and modulators modulate the compensating power with signals derived from the signal source such that the modulated compensating power is the complement of the modulated RF drive power. A summer combines the modulated RF drive power and compensating power to drive the acoustooptic device such that the spatial thermal energy distribution inside the acoustooptic device remains substantially constant.
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patent: 5121245 (1992-06-01), Johnson
patent: 5363221 (1994-11-01), Sutton et al.
Coppock Richard A.
Kump John
Ben Loha
Crystal Technology, Inc.
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