Frequency stabilization of frequency-doubled Nd : YAG lasers at 532 nm

We report the preliminary results on the frequency stabilization of two frequency-doubled diode-pumped Nd:YAG lasers to hyperfrne structure components of the rovibrational transition P(54)32-0 of I-127(2) with the sub-Doppler sidebands method In a preliminary experiment, we have obtained a relative frequency stability of 2.9 . 10(-13) for an integration time of 1 s.