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Proceedings Paper

Evaluation of the noise properties of a dual-frequency VECSEL for compact Cs atomic clocks
Author(s): 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
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Paper 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 × 10-12 at 1 second.

Paper Details

Date Published: 4 March 2015
PDF: 10 pages
Proc. SPIE 9349, Vertical External Cavity Surface Emitting Lasers (VECSELs) V, 93490S (4 March 2015); doi: 10.1117/12.2077663
Show Author Affiliations
P. Dumont, Lab. Charles Fabry, Institut d'Optique, CNRS, Univ. Paris Sud 11 (France)
J.-M. Danet, LNE-SYRTE - Observatoire de Paris (France)
F. A. Camargo, Lab. Charles Fabry, Institut d'Optique, CNRS, Univ Paris-Sud 11 (France)
D. Holleville, LNE-SYRTE, Observatoire de Paris (France)
S. Guerandel, LNE-SYRTE, Observatoire de Paris (France)
G. Baili, Thales Research & Technology (France)
Loïc Morvan, Thales Research & Technology (France)
G. Pillet, Thales Research & Technology (France)
D. Dolfi, Thales Research & Technology (France)
I. Gozhyk, Lab. Charles Fabry, Institut d'Optique, CNRS, Univ. Paris Sud 11 (France)
Lab. de Photonique et de Nanostructures, CNRS (France)
G. Beaudoin, Lab. de Photonique et de Nanostructures, CNRS (France)
I. Sagnes, Lab. de Photonique et de Nanostructures, CNRS (France)
P. Georges, Lab. Charles Fabry, Institut d'Optique, CNRS, Univ. Paris Sud 11 (France)
Gaëlle Lucas-Leclin, Lab. Charles Fabry (France)


Published in SPIE Proceedings Vol. 9349:
Vertical External Cavity Surface Emitting Lasers (VECSELs) V
Mircea Guina, Editor(s)

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