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Optics Letters

Optics Letters


  • Vol. 36, Iss. 18 — Sep. 15, 2011
  • pp: 3563–3565

Laser power noise detection at the quantum-noise limit of 32 A photocurrent

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

Optics Letters, Vol. 36, Issue 18, pp. 3563-3565 (2011)

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The power noise of a cw Nd:YAG laser system was measured at radio frequencies using the optical ac coupling technique. An additional mode cleaner in the setup allowed a high optical ac coupling amplification of 62.3. For the first time, to our knowledge, a sensitivity of 1.1 × 10 10 Hz 1 / 2 relative power noise was achieved corresponding to an equivalent detected photocurrent of 32 A . High precision optics experiments can utilize this scheme to improve the sensitivity of their photodetectors.

© 2011 Optical Society of America

OCIS Codes
(040.5160) Detectors : Photodetectors
(230.5750) Optical devices : Resonators

ToC Category:

Original Manuscript: July 15, 2011
Manuscript Accepted: August 8, 2011
Published: September 8, 2011

Patrick Kwee, Benno Willke, and Karsten Danzmann, "Laser power noise detection at the quantum-noise limit of 32 A photocurrent," Opt. Lett. 36, 3563-3565 (2011)

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