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Optics Letters

Optics Letters


  • Vol. 36, Iss. 16 — Aug. 15, 2011
  • pp: 3221–3223

Optical refractometer based on an asymmetrical twin-core fiber Michelson interferometer

Ai Zhou, Yanhui Zhang, Guangping Li, Jun Yang, Yuzhuo Wang, Fengjun Tian, and Libo Yuan  »View Author Affiliations

Optics Letters, Vol. 36, Issue 16, pp. 3221-3223 (2011)

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We report and demonstrate an optical refractometer based on a compact fiber Michelson interferometer. The Michelson interferometer is composed of an asymmetrical twin-core fiber containing a central core and a side core. By chemically etching a segment of the twin-core fiber until the side core is exposed, the effective index of the side core in the etched region is sensitive to the environmental refractive index, which leads to a shift of the transmission spectrum of the Michelson interferometer. The experimental results show that such a device has a refractive index resolution of more than 800 nm / refractive index unit in the range of 1.34–1.37.

© 2011 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(130.3120) Integrated optics : Integrated optics devices

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: June 6, 2011
Revised Manuscript: July 5, 2011
Manuscript Accepted: July 15, 2011
Published: August 12, 2011

Ai Zhou, Yanhui Zhang, Guangping Li, Jun Yang, Yuzhuo Wang, Fengjun Tian, and Libo Yuan, "Optical refractometer based on an asymmetrical twin-core fiber Michelson interferometer," Opt. Lett. 36, 3221-3223 (2011)

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