Frequency stabilization of a Nd:YAG laser at 660 nm

Laser-diode-pumped Nd:YAG lasers at 1319 nm are frequency stabilized by locking their frequency-doubled output (660 nm) to Doppler-free absorption lines of molecular iodine. The frequency stability of the lasers has reached a level of 8/spl times/10/sup -13/ when the integration time is longer than 50 s.