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Optics Letters

Optics Letters


  • Vol. 36, Iss. 18 — Sep. 15, 2011
  • pp: 3593–3595

Ultrasensitive refractive-index sensors based on rectangular silica microfibers

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

Optics Letters, Vol. 36, Issue 18, pp. 3593-3595 (2011)

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We demonstrate an ultrasensitive refractive-index (RI) sensor utilizing the polarimetric interference of a rectangular silica microfiber. The measured sensitivity is as high as 18 , 987 nm / RIU (refractive-index unit) around the RI of 1.33, which is 1 order of magnitude higher than that of the previously reported microfiber devices. Theoretical analysis reveals that such high sensitivity not only is originated from the RI-induced birefringence variation but also relies on the unique birefringence dispersion property for the rectangular microfiber. We predict that the sensitivity can be enhanced significantly when the group birefringence approaches zero.

© 2011 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(230.3990) Optical devices : Micro-optical devices
(260.1440) Physical optics : Birefringence

ToC Category:
Physical Optics

Original Manuscript: June 27, 2011
Revised Manuscript: August 15, 2011
Manuscript Accepted: August 17, 2011
Published: September 12, 2011

Jie Li, Li-Peng Sun, Shuai Gao, Zhan Quan, Yong-Liang Chang, Yang Ran, Long Jin, and Bai-Ou Guan, "Ultrasensitive refractive-index sensors based on rectangular silica microfibers," Opt. Lett. 36, 3593-3595 (2011)

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