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Injection locking method for Raman beams in atom interferometer
Author(s): Fei Zi; Jianing Deng; Daji Zeng; Tong Li; Mingli Sun; Xian Zhang; Kaikai Huang; Xuanhui Lu
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Paper Abstract

We present a novel method to generate two phase-locked beams with a frequency offset of 6.834 GHz. The output of the master laser is firstly modulated by an electric optical modulator (EOM), and then further injected into an Extended Cavity Diode Lasers (ECDL) which is used to filter out the unwanted mode and amplify the laser power. By locking to the first-order lower sideband of the modulated master laser, the average variance of the phase fluctuations is 5.6 x 10-3 rad2 , which implies phase coherence of 99.44% between the master laser and the slave ECDL. The line width of the beat notes is less than 1Hz. For the long term stability, with the delicate design of the electronic controller in ECDL, the phase coherence of the two laser beams can be stabilized over 200 hours without any adjustment. The Raman system is applicable for gravity detection with a preliminary sensitivity Δg/g of 4.5 x 10-7 for interrogation time of 1500 s.

Paper Details

Date Published: 5 March 2018
PDF: 5 pages
Proc. SPIE 10714, Third International Conference on Photonics Solutions (ICPS2017), 1071406 (5 March 2018); doi: 10.1117/12.2299449
Show Author Affiliations
Fei Zi, Zhejiang Univ. (China)
Jianing Deng, Zhejiang Univ. (China)
Daji Zeng, Zhejiang Univ. (China)
Tong Li, Zhejiang Univ. (China)
Mingli Sun, Zhejiang Univ. (China)
Xian Zhang, Zhejiang Univ. (China)
Kaikai Huang, Zhejiang Univ. (China)
Xuanhui Lu, Zhejiang Univ. (China)


Published in SPIE Proceedings Vol. 10714:
Third International Conference on Photonics Solutions (ICPS2017)
Thawatchai Mayteevarunyoo, Editor(s)

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