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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 3 — Feb. 11, 2013
  • pp: 3103–3113

Wideband laser locking to an atomic reference with modulation transfer spectroscopy

V. Negnevitsky and L. D. Turner  »View Author Affiliations


Optics Express, Vol. 21, Issue 3, pp. 3103-3113 (2013)
http://dx.doi.org/10.1364/OE.21.003103


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Abstract

We demonstrate that conventional modulated spectroscopy apparatus, used for laser frequency stabilization in many atomic physics laboratories, can be enhanced to provide a wideband lock delivering deep suppression of frequency noise across the acoustic range. Using an acousto-optic modulator driven with an agile oscillator, we show that wideband frequency modulation of the pump laser in modulation transfer spectroscopy produces the unique single lock-point spectrum previously demonstrated with electro-optic phase modulation. We achieve a laser lock with 100 kHz feedback bandwidth, limited by our laser control electronics. This bandwidth is sufficient to reduce frequency noise by 30 dB across the acoustic range and narrows the imputed linewidth by a factor of five.

© 2013 OSA

OCIS Codes
(300.6290) Spectroscopy : Spectroscopy, four-wave mixing
(140.3425) Lasers and laser optics : Laser stabilization

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: January 9, 2013
Manuscript Accepted: January 15, 2013
Published: January 31, 2013

Citation
V. Negnevitsky and L. D. Turner, "Wideband laser locking to an atomic reference with modulation transfer spectroscopy," Opt. Express 21, 3103-3113 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-3-3103


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