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Optics Letters

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  • Vol. 36, Iss. 9 — May. 1, 2011
  • pp: 1698–1700

Precision angle sensor using an optical lever inside a Sagnac interferometer

J. M. Hogan, J. Hammer, S.-W. Chiow, S. Dickerson, D. M. S. Johnson, T. Kovachy, A. Sugarbaker, and M. A. Kasevich  »View Author Affiliations


Optics Letters, Vol. 36, Issue 9, pp. 1698-1700 (2011)
http://dx.doi.org/10.1364/OL.36.001698


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Abstract

We built an ultra-low-noise angle sensor by combining a folded optical lever and a Sagnac interferometer. The instrument has a measured noise floor of 1.3 prad / Hz at 2.4 kHz . We achieve this record angle sensitivity using a proof-of-concept apparatus with a conservative N = 11 bounces in the optical lever. This technique could be extended to reach subpicoradian / Hz sensitivities with an optimized design.

© 2011 Optical Society of America

OCIS Codes
(120.3940) Instrumentation, measurement, and metrology : Metrology
(120.4640) Instrumentation, measurement, and metrology : Optical instruments
(120.5790) Instrumentation, measurement, and metrology : Sagnac effect

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: February 25, 2011
Revised Manuscript: April 1, 2011
Manuscript Accepted: April 9, 2011
Published: April 29, 2011

Citation
J. M. Hogan, J. Hammer, S.-W. Chiow, S. Dickerson, D. M. S. Johnson, T. Kovachy, A. Sugarbaker, and M. A. Kasevich, "Precision angle sensor using an optical lever inside a Sagnac interferometer," Opt. Lett. 36, 1698-1700 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-9-1698


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References

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