Abstract

A diode-laser-pumped Nd:YAG laser is frequency stabilized by locking its frequency-doubled output to the center of unsaturated (Doppler-broadened) transitions of the ¹²⁷I₂ molecule. The successive two-sample deviation of the laser frequency (root Allan variance) is kept below 5.67 kHz, or 2 parts in 10¹¹ of the laser frequency, for averaging times between 10 ms and 40 s. This locking technique is simpler and requires less laser power than locking to Doppler-free lines.

© 1993 Optical Society of America

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