Optical frequency stabilizer and optical frequency selector

Details Optical frequency stabilizer and optical frequency selector Optical frequency stabilizer and optical frequency selector

1995-06-02

1996-04-23

Boudreau, Leo

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359134, 359187, 372 32, 372 24, H04J 1402

Patent

active

055109225

ABSTRACT:
An optical frequency stabilizer comprises a signal light source for outputting signal light of a frequency f.sub.s ; a frequency shifter having a pumping light source to emit pumping light of a frequency f.sub.p and producing converted signal light of a frequency 2f.sub.p -f.sub.s from the signal light supplied thereto; a frequency discriminator for converting a frequency change of the received converted signal light into an intensity change; an optical detector for producing a detection signal in response to the output light of the frequency discriminator; an oscillator for outputting a low-frequency signal; a modulator circuit for frequency-modulating the signal light source in accordance with the low-frequency signal; a synchronous detector circuit connected operatively to the oscillator and the optical detector; an inverter circuit for inverting the output characteristic of the synchronous detector circuit; and a control circuit for controlling the signal light source in such a manner as to maintain constant the output level of the synchronous detector circuit. This optical frequency stabilizer has high frequency stability.

REFERENCES:
patent: 5068864 (1991-11-01), Javan

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