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Optics Letters

Optics Letters


  • Editor: Anthony J. Campillo
  • Vol. 31, Iss. 13 — Jul. 1, 2006
  • pp: 2000–2002

Laser power stabilization for second-generation gravitational wave detectors

Frank Seifert, Patrick Kwee, Michèle Heurs, Benno Willke, and Karsten Danzmann  »View Author Affiliations

Optics Letters, Vol. 31, Issue 13, pp. 2000-2002 (2006)

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We present results on the power stabilization of a Nd : YAG laser in the frequency band from 1 Hz to 100 kHz . High-power, low-noise photodetectors are used in a dc-coupled control loop to achieve relative power fluctuations down to 5 × 10 9 Hz 1 2 at 10 Hz and 3.5 × 10 9 Hz 1 2 up to several kHz, which is very close to the shot-noise limit for 80 mA of detected photocurrent on each detector. We investigated and eliminated several noise sources such as ground loops and beam pointing. The achieved stability level is close to the requirements for the Advanced LIGO gravitational wave detector.

© 2006 Optical Society of America

OCIS Codes
(040.5160) Detectors : Photodetectors
(140.3570) Lasers and laser optics : Lasers, single-mode
(270.2500) Quantum optics : Fluctuations, relaxations, and noise

ToC Category:
Lasers and Laser Optics

Original Manuscript: March 1, 2006
Manuscript Accepted: March 13, 2006

Frank Seifert, Patrick Kwee, Michèle Heurs, Benno Willke, and Karsten Danzmann, "Laser power stabilization for second-generation gravitational wave detectors," Opt. Lett. 31, 2000-2002 (2006)

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