Abstract

A frequency-stabilized CO₂ laser using the saturated fluorescence technique was constructed. Stainless-steel rods were used to support the cavity, and a thermoelectrically cooled PbSe detector monitored the 4.3-μm fluorescence from a low-pressure CO₂ absorption cell. Stabilization of the CO₂ laser at the center of the saturation dip was achieved with the absorption cell inside or outside the laser cavity. The frequency stability is estimated to be better than 3.5 × 10⁻⁹.

© 1988 Optical Society of America

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