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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 6 — Feb. 20, 2014
  • pp: 1028–1032

Trench-embedding fiber taper sensor fabricated by a femtosecond laser for gas refractive index sensing

Zhitao Cao, Lan Jiang, Sumei Wang, Peng Wang, Fei Zhang, and Yongfeng Lu  »View Author Affiliations


Applied Optics, Vol. 53, Issue 6, pp. 1028-1032 (2014)
http://dx.doi.org/10.1364/AO.53.001028


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Abstract

A fiber in-line, multimode coupling interferometer with a trench-embedding, fiber taper probe is proposed and fabricated by femtosecond-laser-induced water breakdown. The reflection-type taper probe is used for gas refractive index (RI) detection from 1.0001143 to 1.0002187 and temperature sensing from 50°C to 500°C. The largest RI sensitivity of the taper probe embedded with a trench at a width of 18.4 μm is 669.502nm/RIU for hybrid nitrogen and helium. Temperature sensitivity is 9.97pm/°C and it shows good linearity through the whole testing range. The new-type multimode interferometer is appropriate for high-accuracy gas RI detection of micrometer-scale spaces and wide-range temperature compensation can be realized.

© 2014 Optical Society of America

OCIS Codes
(060.2280) Fiber optics and optical communications : Fiber design and fabrication
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(220.4610) Optical design and fabrication : Optical fabrication

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: September 17, 2013
Revised Manuscript: January 6, 2014
Manuscript Accepted: January 7, 2014
Published: February 12, 2014

Citation
Zhitao Cao, Lan Jiang, Sumei Wang, Peng Wang, Fei Zhang, and Yongfeng Lu, "Trench-embedding fiber taper sensor fabricated by a femtosecond laser for gas refractive index sensing," Appl. Opt. 53, 1028-1032 (2014)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-53-6-1028

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