Coherent light generators – Particular beam control device – Optical output stabilization
Patent
1984-05-21
1986-05-20
Scott, Jr., Leon
Coherent light generators
Particular beam control device
Optical output stabilization
372 28, 372 9, H01S 313
Patent
active
045905975
ABSTRACT:
A method and apparatus are disclosed for precisely stabilizing a laser to a sub-Doppler resonance of an absorbing gas contained in a cell located external to the laser resonator. Stabilization is based on the detection of modulation transferred onto a previously unmodulated probe beam by the non-linear interactions of the absorbing gas located in a cell which is subject to a counter-running, frequency-modulated saturation beam. Alternatively, the further modulation of the saturation beam can be detected.
REFERENCES:
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Hall et al., "Optical Heterodyne Saturation Spectroscopy", Appl Phys Lett (9), Nov. 1, 1981, p. 680.
Shirley, "Modulation Tranf. Processes in Opt. Heterodyne Saturation Spectros.", Opt. Lett, vol. 7, No. 71, Nov. 1982.
Snyder et al., "High Sensitivity Non-Linear Spect. Using a Freq. Off-Set Pump", Opt. Lett, vol. 5, No. 4, Apr. '80.
Nekazawa et al., "Freq. Stabiliz of 0.633 .mu.m Line with the Aid of 3.39 .mu.m Line Locked Chg.", Appl. Phys Lett 35(10), Nov. 15, 1979.
Tanzika et al.. "Preliminary Exp. for Stabilizing Unmodulated He-Ne Laser to an Iodini Hyperfine Comp.", J. Appl Phys 50(i), Jan. 1, 79.
Hall John L.
Hollberg Leo
Long-sheng Ma
Shirley Jon H.
Englert Alvin J.
Jackson Douglas E.
Jr. Leon Scott
Pawlikowski Eugene J.
The United States of America as represented by the Secretary of
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