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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 9 — Mar. 20, 2010
  • pp: 1593–1598

Refractive index measurement using photonic crystal fiber-based Fabry–Perot interferometer

Ming Deng, Chang-Ping Tang, Tao Zhu, Yun-Jiang Rao, Lai-Cai Xu, and Meng Han  »View Author Affiliations


Applied Optics, Vol. 49, Issue 9, pp. 1593-1598 (2010)
http://dx.doi.org/10.1364/AO.49.001593


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Abstract

We have constructed a novel refractive index (RI) sensor based on a fiber optic Fabry–Perot interferometer (FPI) by splicing a section of hollow core fiber between a single-mode fiber and a photonic crystal fiber (PCF). Owing to the air holes in the cladding of the PCF, various substances, such as liquids and gases with different RI, can enter or leave the in-fiber air cavity, which makes the device usable as a refractometer. In this paper, the fiber optic FPI sensor has been used to monitor the RI changes of air with different pressures, and the experimental results show that such a sensor has an RI sensitivity of 805.1 μm / RIU , and hysteresis is not observed. Moreover, the easy fabrication method gives the in-fiber refractometer many potential applications in the sensing field.

© 2010 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.2230) Instrumentation, measurement, and metrology : Fabry-Perot
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(280.5715) Remote sensing and sensors : Refractivity profiles

ToC Category:
Optical Devices

History
Original Manuscript: November 4, 2009
Revised Manuscript: January 7, 2010
Manuscript Accepted: January 28, 2010
Published: March 11, 2010

Citation
Ming Deng, Chang-Ping Tang, Tao Zhu, Yun-Jiang Rao, Lai-Cai Xu, and Meng Han, "Refractive index measurement using photonic crystal fiber-based Fabry-Perot interferometer," Appl. Opt. 49, 1593-1598 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-9-1593

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