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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 28 — Oct. 1, 2009
  • pp: 5423–5431

Laser power stabilization using optical ac coupling and its quantum and technical limits

Patrick Kwee, Benno Willke, and Karsten Danzmann  »View Author Affiliations


Applied Optics, Vol. 48, Issue 28, pp. 5423-5431 (2009)
http://dx.doi.org/10.1364/AO.48.005423


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Abstract

We demonstrate an active power stabilization of a Nd:YAG laser employing the optical ac-coupling scheme and derive its fundamental quantum limit. This limit is 3 dB better than the one encountered in traditional power stabilization schemes. In our experiment, the optical ac coupling improved the shot-noise-limited sensitivity of the stabilization photodetector by a factor of 11.2. With an independent photodetector, we measured a relative power stability of 3.7 × 10 9 Hz 1 / 2 at frequencies of around 200 kHz . A detailed investigation of the performance limit of our experiment revealed a novel noise source that disturbed the fundamental mode field in the optical resonator. This effect could be of relevance to many precision experiments using optical resonators.

© 2009 Optical Society of America

OCIS Codes
(040.5160) Detectors : Photodetectors
(230.5750) Optical devices : Resonators
(140.3425) Lasers and laser optics : Laser stabilization

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: July 6, 2009
Manuscript Accepted: September 2, 2009
Published: September 25, 2009

Citation
Patrick Kwee, Benno Willke, and Karsten Danzmann, "Laser power stabilization using optical ac coupling and its quantum and technical limits," Appl. Opt. 48, 5423-5431 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-28-5423

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