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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 16 — Jun. 1, 2013
  • pp: 3671–3679

Design and performance of an absolute gas refractometer based on a synthetic pseudo-wavelength method

Jitao Zhang, Pei Huang, Yan Li, and Haoyun Wei  »View Author Affiliations


Applied Optics, Vol. 52, Issue 16, pp. 3671-3679 (2013)
http://dx.doi.org/10.1364/AO.52.003671


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Abstract

We present a refractometer that is capable of measuring the refractive index of gases with an unambiguous range of 1.000395 and an uncertainty of 3.14×108 at 633 nm. The measurement range was extended via the combination of the vacuum cells according to the proposed synthetic pseudo-wavelength (SPW) method. The basic principles of the SPW method and the design of the gas refractometer are presented in detail. The performance of the refractometer was verified in the measurements of dry air, nitrogen gas, and ambient air under different environmental conditions. No gas-filling or pumping processes were required during the measurements; so one measurement could be completed within 70 s. Compared with existing refractometers, the method reported here holds advantages in its large unambiguous measuring range, fast speed, high accuracy, and simple instrumentation design.

© 2013 Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.4530) Instrumentation, measurement, and metrology : Optical constants
(120.4640) Instrumentation, measurement, and metrology : Optical instruments
(120.5710) Instrumentation, measurement, and metrology : Refraction

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: March 12, 2013
Revised Manuscript: April 22, 2013
Manuscript Accepted: April 24, 2013
Published: May 22, 2013

Citation
Jitao Zhang, Pei Huang, Yan Li, and Haoyun Wei, "Design and performance of an absolute gas refractometer based on a synthetic pseudo-wavelength method," Appl. Opt. 52, 3671-3679 (2013)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-52-16-3671


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