Device for frequency stabilizing an RF excitation laser

Details Device for frequency stabilizing an RF excitation laser Device for frequency stabilizing an RF excitation laser

1985-06-12

1987-09-15

Wan, Gene

Coherent light generators

Particular beam control device

Optical output stabilization

372 38, H01S 313

Patent

active

046944583

ABSTRACT:
A device is provided for stabilizing the frequency of an RF excitation laser, comprising a means for matching the impedance of the cavity of the laser with that at the output of the excitation generator. The matching means are connected through a line to a circulator which is connected to the generator and to an RF diode. A synchronous detector is connected to the outputs of the diode and of an oscillator. The output of the detector is connected through an integrator to a piezoelectric ceramic supporting one of the mirrors of the cavity of the laser, modulated by the oscillator. The phase shift between the signal reflected by the cavity and the signal of the oscillator and the amplitude of the former allow the cavity to be stabilized in frequency.

REFERENCES:
patent: 4443877 (1984-04-01), Chenausky et al.
patent: 4451766 (1984-05-01), Angle et al.
Optics Communications, vol. 30, No. 2, aout 1979, pp. 213-218, Amsterdam, NL; A. L. S. Smith et al.: "Opto-Galvanic Stabilized CO2 Laser".
Review of Scientific Instruments, vol. 46, No. 4, avril 1975, pp. 409-412, American Institute of Physics, New York, U.S.; W. H. Thomason et al.: "An Inexpensive Method to Stabilize the Frequency of a CO2 Laser", *Paragraphe II; FIG. 2*.
R. W. Beatty: "Microwave Impedence Measurements and Standards", National Bureau of Standards Monograph 82, 12 aout 1965, pp. 22-30, *Paragraphe 10.3, Single Directional Coupler Reflectometer*.

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