Laser frequency locking with 46  GHz offset using an electro-optic modulator for magneto-optical trapping of francium atoms.

  title={Laser frequency locking with 46  GHz offset using an electro-optic modulator for magneto-optical trapping of francium atoms.},
  author={Ken-ichi Harada and Takao Aoki and S. Ezure and K. Kato and T Hayamizu and H Kawamura and T. Inoue and Hiroshi Arikawa and T. Ishikawa and A Uchiyama and K. Sakamoto and Shun Ito and Makoto Itoh and Satoshi Ando and Atsushi Hatakeyama and Kichiji Hatanaka and Ken’ichi Imai and T. Murakami and Huliyar S. Nataraj and Yasuhiro Shimizu and T. Sato and Tomotsugu Wakasa and Hidetomo P. Yoshida and Yasuhiro Sakemi},
  journal={Applied optics},
  volume={55 5},
We demonstrate frequency offset locking between two laser sources using a waveguide-type electro-optic modulator (EOM) with 10th-order sidebands for magneto-optical trapping of Fr atoms. The frequency locking error signal was successfully obtained by performing delayed self-homodyne detection of the beat signal between the repumping frequency and the 10th-order sideband component of the trapping light. Sweeping the trapping-light and repumping-light frequencies with keeping its frequency… 

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