Laser frequency locking with 46 GHz offset using an electro-optic modulator for magneto-optical trapping of francium atoms
Harada, K. · Aoki, T. · Ezure, S. · Kato, K. · Hayamizu, T. · Kawamura, H. · Inoue, T. · Arikawa, H. · Ishikawa, T. · Aoki, T. · Uchiyama, A. · Sakamoto, K. · Ito, S. · Itoh, M. · Ando, S. · Hatakeyama, A. · Hatanaka, K. · Imai, K. · Murakami, T. · Nataraj, H. S. · Shimizu, Y. · Sato, T. · Wakasa, T. · Yoshida, H. P. · Sakemi, Y.
الأصل · EN
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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