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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 1 — Jan. 1, 2011
  • pp: 53–60

Active suppression of air refractive index fluctuation using a Fabry–Perot cavity and a piezoelectric volume actuator

Tuan Quoc Banh, Yuria Ohkubo, Yoshinosuke Murai, and Masato Aketagawa  »View Author Affiliations

Applied Optics, Vol. 50, Issue 1, pp. 53-60 (2011)

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Air refractive index fluctuation ( Δ n air ) is one of the largest uncertainty sources in precision interferometry systems that require a resolution of nanometer order or less. We introduce a method for the active suppression of Δ n air inside a normal air-environment chamber using a Fabry–Perot cavity and a piezoelectric volume actuator. The temporal air refractive index ( n air ) at a local point is maintained constant with an expanded uncertainty of 4.2 × 10 9 ( k = 2 ), a sufficiently low uncertainty for precise measurements unaffected by Δ n air to be made inside a chamber.

© 2010 Optical Society of America

OCIS Codes
(120.2230) Instrumentation, measurement, and metrology : Fabry-Perot
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.3940) Instrumentation, measurement, and metrology : Metrology
(120.5060) Instrumentation, measurement, and metrology : Phase modulation

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: June 29, 2010
Revised Manuscript: October 13, 2010
Manuscript Accepted: November 16, 2010
Published: December 23, 2010

Tuan Quoc Banh, Yuria Ohkubo, Yoshinosuke Murai, and Masato Aketagawa, "Active suppression of air refractive index fluctuation using a Fabry–Perot cavity and a piezoelectric volume actuator," Appl. Opt. 50, 53-60 (2011)

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