Laser beam control apparatus

Details Laser beam control apparatus Laser beam control apparatus

1992-06-03

1993-12-07

Scott, Jr., Leon

Coherent light generators

Particular beam control device

Optical output stabilization

372 38, 372 9, 372 29, H01S 313

Patent

active

052689140

ABSTRACT:
The laser beam control apparatus according to the invention having a photodiode for outputting a current consisting of high and low-frequency components in accordance with the amount of a laser beam emitted from a laser diode. The current output from the photodiode is separated into high and low-frequency components by a CR filter, and the separated low-frequency current is amplified by an amplifier. The current amplified by this amplifier is added to the high-frequency current separated by the CR filter. The resulting sum current is converted into a voltage by an amplifier, and the amount of the laser beam emitted from the laser diode is controlled in accordance with the voltage converted by this amplifier. With this operation, the laser beam output power of the laser diode can be stably controlled in a wide band.

REFERENCES:
patent: 4899348 (1990-02-01), Kiya et al.
patent: 5151910 (1992-09-01), Inuyama et al.

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