High-voltage crystal ramp generator and integrator for FM laser

Details High-voltage crystal ramp generator and integrator for FM laser High-voltage crystal ramp generator and integrator for FM laser

1993-01-28

1994-09-13

Buczinski, Stephen C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356 285, 359239, 359278, G01C 308, G02B 2600, G02F 123

Patent

active

053473574

ABSTRACT:
A power beam tube is biased to supply a constant current to an EO crystal used as part of a frequency modulation circuit for FM laser radar. Integration of the constant current by the EO crystal's capacitance generates the desired ramp voltage waveform. A correction current is easily added to the circuit. The circuit effectively removes the EO crystal driver circuitry from the control loop, increasing the speed of the frequency modulator loop about ten times.

REFERENCES:
patent: 4666295 (1987-05-01), Duvall, III et al.
patent: 4846571 (1989-07-01), Jelalian et al.
patent: 5077619 (1991-12-01), Toms
patent: 5111468 (1992-05-01), Kozlousky et al.
patent: 5173749 (1992-12-01), Tell et al.
patent: 5245461 (1993-09-01), Fitzmartin

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