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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 16 — Jun. 1, 2014
  • pp: 3548–3555

Homodyne interferometry with quadrature fringe detection for absolute gravimeter

Sergiy Svitlov and Akito Araya  »View Author Affiliations


Applied Optics, Vol. 53, Issue 16, pp. 3548-3555 (2014)
http://dx.doi.org/10.1364/AO.53.003548


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Abstract

An absolute gravimeter is based on interferometric displacement measurement during repeated free falls of a target mirror in a high vacuum. A suitable homodyne quadrature laser interferometer is developed and reported. Standard deviation of the mean absolute gravity value in a typical two-day measurement session is less than 1×108m/s2. Additionally, digital demodulation of the interference signal using a 90° phase-shift filter based on the Hilbert transform is presented. A combination of optical and digital quadrature phase shifts is shown to be helpful to improve accuracy in homodyne interferometers with the accelerated target mirror.

© 2014 Optical Society of America

OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.2650) Instrumentation, measurement, and metrology : Fringe analysis
(120.2920) Instrumentation, measurement, and metrology : Homodyning
(120.3930) Instrumentation, measurement, and metrology : Metrological instrumentation

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: March 13, 2014
Revised Manuscript: April 21, 2014
Manuscript Accepted: April 22, 2014
Published: May 30, 2014

Citation
Sergiy Svitlov and Akito Araya, "Homodyne interferometry with quadrature fringe detection for absolute gravimeter," Appl. Opt. 53, 3548-3555 (2014)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-53-16-3548

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