Optical laser frequency stabilizer

Details Optical laser frequency stabilizer Optical laser frequency stabilizer

1991-07-30

1992-10-06

Scott, Jr., Leon

Coherent light generators

Particular beam control device

Optical output stabilization

372 38, 372 31, 372 13, H01S 313

Patent

active

051538881

ABSTRACT:
An optical laser frequency stabilizer which is simple, inexpensive, produces an unmodulated output, and a highly controlled oscillation frequency, wherein signals supplied to a master laser are modulated with a signal which is switched between four or more different levels to control the oscillation frequency of the master laser to the frequency of an absorption line; and wherein the beat frequency of signals from the master laser and a slave laser is counted by an up-down frequency counter in synchronism with the modulation signal and, in response to the obtained total count, the oscillation frequency of the slave laser is controlled to a frequency based on the center frequency of the oscillation of the master laser so that an unmodulated output is generated which is not affected by variations in the powers of the laser beams. The laser frequency can be offset from the frequency of the absorption line, and also the offset frequency can be varied continuously.

REFERENCES:
patent: 4590597 (1986-05-01), Long-Sheng et al.

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