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Optics Letters

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  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 12 — Jun. 15, 2014
  • pp: 3531–3534

Fabrication of elliptic microfibers with CO2 laser for high-sensitivity refractive index sensing

Li-Peng Sun, Jie Li, Shuai Gao, Long Jin, Yang Ran, and Bai-Ou Guan  »View Author Affiliations


Optics Letters, Vol. 39, Issue 12, pp. 3531-3534 (2014)
http://dx.doi.org/10.1364/OL.39.003531


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Abstract

We propose a convenient method for achieving highly birefringent (HiBi) elliptic microfibers by use of the CO2-laser machining and the flame-brushing techniques. With optimization of fabrication process, a high birefringence of up to 2.10×102 is experimentally obtained. Especially, within a polarization Sagnac interferometer acting as a refractive index (RI) sensor, both positive and abnormal negative sensitivity is measured, dependent on the geometrical variables of the HiBi microfiber. The maximum RI sensitivity is 195,348nm/RI-unit around RI=1.35887, which is the highest among the microfiber devices as reported, to our knowledge.

© 2014 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.2420) Fiber optics and optical communications : Fibers, polarization-maintaining
(230.3990) Optical devices : Micro-optical devices

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: April 3, 2014
Revised Manuscript: May 7, 2014
Manuscript Accepted: May 8, 2014
Published: June 9, 2014

Citation
Li-Peng Sun, Jie Li, Shuai Gao, Long Jin, Yang Ran, and Bai-Ou Guan, "Fabrication of elliptic microfibers with CO2 laser for high-sensitivity refractive index sensing," Opt. Lett. 39, 3531-3534 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-12-3531


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