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Modulation-free laser frequency offset locking using buffer gas-induced resonance

par Yang, Guoqing;Xu, Yunfei;Lin, Qiang;Zhang, Han
Référence Chinese Optics Letters, 11, 10, 100201
Publication Publié, 2013-10

Article révisé par les pairs

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Résumé :

We experimentally demonstrate a simple modulation-free scheme for offset locking the frequency of a laser using buffer gas-induced resonance. Our scheme excludes the limitation of low diffraction efficiency and laser input intensity when an acousto-optic modulator is applied to shift the laser frequency from the resonance. We show the stabilization of a strong 795 - nm laser detuned up to 550 MHz from the 87Rb 5S1/2F=2→5P1/2 F'=2 transition. The locking range can be modified by controlling the buffer gas pressure. A laser line width of 2 MHz is achieved over 10 min. © 2013 Chinese Optics Letters.