Evaluation of the noise properties of a dual-frequency VECSEL for compact Cs atomic clocks

P. Dumont; J.-M. Danet; F. A. Camargo; D. Holleville; S. Guerandel; G. Baili; Loïc Morvan; G. Pillet; D. Dolfi; I. Gozhyk; G. Beaudoin; I. Sagnes; P. Georges; Gaëlle Lucas-Leclin

doi:10.1117/12.2077663

4 March 2015 Evaluation of the noise properties of a dual-frequency VECSEL for compact Cs atomic clocks

P. Dumont, J.-M. Danet, F. A. Camargo, D. Holleville, S. Guerandel, G. Baili, Loïc Morvan, G. Pillet, D. Dolfi, I. Gozhyk, G. Beaudoin, I. Sagnes, P. Georges, Gaëlle Lucas-Leclin

Author Affiliations +

Proceedings Volume 9349, Vertical External Cavity Surface Emitting Lasers (VECSELs) V; 93490S (2015) https://doi.org/10.1117/12.2077663
Event: SPIE LASE, 2015, San Francisco, California, United States

Abstract

We evaluate a dual-frequency and dual-polarization optically-pumped semiconductor laser emitting at 852 nm as a new laser source for compact atomic clocks based on the coherent population trapping (CPT) technique. The frequency difference between the laser modes is tunable to 9.2 GHz corresponding to the ground state hyperfine-split of Cs. Impact of the laser noise has been investigated. Laser relative intensity noise is limited by the pump-𝑅𝐼𝑁 transfer to a level of - 110 dB/Hz. Laser frequency noise shows excess mechanical and technical noise resulting in a laser linewidth of 1 MHz at 1 s in lock operation. The noise performance and spectral properties of the laser are already adequate to realize CPT experiments and should result in Allan standard-deviation of the clock below 1 × 10^-12at 1 second.

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P. Dumont, J.-M. Danet, F. A. Camargo, D. Holleville, S. Guerandel, G. Baili, Loïc Morvan, G. Pillet, D. Dolfi, I. Gozhyk, G. Beaudoin, I. Sagnes, P. Georges, and Gaëlle Lucas-Leclin "Evaluation of the noise properties of a dual-frequency VECSEL for compact Cs atomic clocks", Proc. SPIE 9349, Vertical External Cavity Surface Emitting Lasers (VECSELs) V, 93490S (4 March 2015); https://doi.org/10.1117/12.2077663

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