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Amplitude and Frequency Stabilization of a cw Nd:YAG Ring Laser

We have developed a single-frequency cw Nd:YAG ring laser for the generation of squeezed light. Both the amplitude and frequency of the laser are stabilized. An acousto-optic modulator removes the intensity fluctuation with the first-order diffracted beam for the amplitude stabilization. The laser frequency is locked to a resonant reference cavity by using the dithering technique. Amplitude stability better than 0.1% and frequency stability of 160 kHz rms are obtained with output power over 2 W at 1.064 µ m.