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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 12 — Apr. 20, 2014
  • pp: 2696–2701

Semi-open cavity in-fiber Mach–Zehnder interferometer for temperature measurement with ultra-high sensitivity

Ai Zhou, Yaxun Zhang, Quan Xu, Jun Yang, and Libo Yuan  »View Author Affiliations


Applied Optics, Vol. 53, Issue 12, pp. 2696-2701 (2014)
http://dx.doi.org/10.1364/AO.53.002696


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Abstract

We demonstrate a semi-open cavity in-fiber Mach–Zehnder interferometer based on optical fiber tube (OFT) for temperature measurement with high sensitivity. The interferometer is composed of an OFT sandwiched between two multimode fibers, with lateral offset. The air hole of the OFT was not completely sealed and liquid is poured into the air hole through the unsealed gap. Light from the multimode fiber is split into two beams: one beam transmits directly through the silica tube while the other travels along the liquid-filled cavity. The device has ultra-high temperature sensitivity due to the much larger thermo-optic coefficient of the liquid compared with that of silica. Experimental results show that the temperature sensitivity is 6.35 nm/°C for an ethanol-filled structure.

© 2014 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.6780) Instrumentation, measurement, and metrology : Temperature

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: February 26, 2014
Revised Manuscript: March 18, 2014
Manuscript Accepted: March 20, 2014
Published: April 18, 2014

Citation
Ai Zhou, Yaxun Zhang, Quan Xu, Jun Yang, and Libo Yuan, "Semi-open cavity in-fiber Mach–Zehnder interferometer for temperature measurement with ultra-high sensitivity," Appl. Opt. 53, 2696-2701 (2014)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-53-12-2696


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