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

K. Harada; T. Aoki; S. Ezure; K. Kato; T. Hayamizu; H. Kawamura; T. Inoue; H. Arikawa; T. Ishikawa; A. Uchiyama; K. Sakamoto; S. Ito; M. Itoh; S. Ando; A. Hatakeyama; K. Hatanaka; K. Imai; T. Murakami; H. S. Nataraj; Y. Shimizu; T. Sato; T. Wakasa; H. P. Yoshida; Y. Sakemi

doi:10.1364/ao.55.001164

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arXiv · 1604.00137

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

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Abstract

We demonstrated a 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 difference of 46 GHz was confirmed over 1 GHz by monitoring the Doppler absorption profile of I2. This technique enables us to search for a resonance frequency of magneto-optical trapping of Fr.

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K. Harada, T. Aoki, S. Ezure, K. Kato, T. Hayamizu, H. Kawamura, T. Inoue, H. Arikawa, T. Ishikawa, A. Uchiyama, K. Sakamoto, S. Ito, M. Itoh, S. Ando, A. Hatakeyama, K. Hatanaka, K. Imai, T. Murakami, H. S. Nataraj, Y. Shimizu, T. Sato, T. Wakasa, H. P. Yoshida, Y. Sakemi. 2016-04-01. Laser frequency locking with 46 GHz offset using an electro-optic modulator for magneto-optical trapping of francium atoms. https://doi.org/10.1364/ao.55.001164

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