Two portable 532 nm optical frequency standards stabilized at iodine molecular line have been est...

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Address: No.18,Bei San Huan
Dong Lu,Chaoyang
Dist,Beijing,P.R.China, 100013

ws@nim.ac.cn
Tel:+86-10-64525678

Iodine-stabilized Optical Frequency Standard at 532 nm

Two portable 532 nm optical frequency standards stabilized at iodine molecular line have been established in our laboratory. Two self-developed semi-nonplanar monolithic solid state lasers with excellent frequency and power characters are used as laser sources. A sealed box is adopted to hold the laser which suppresses the dither produced by ambient disturbance; The 1.8 m absorption length is obtained by using a 4-pass strategy in a 45 cm iodine cell in order to improve the signal-to-noise ratio. The residual amplitude modulations are suppressed by dynamically controlling the temperature of the crystal in electro-optic modulator (EOM).