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Optogalvanic Lamb-dip frequency stabilization of a sequence-band CO2 laser

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Abstract

The Lamb dip at the center of sequence-band CO2 laser transitions is detected optogalvanically by using a low-pressure N2-CO2 discharge. The first derivative of this signal is used to frequency stabilize a sequence-band CO2 laser to a stability of better than 2 × 10−9.

© 1987 Optical Society of America

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