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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 22 — Nov. 4, 2013
  • pp: 26136–26143

Refractive index sensitivity enhancement of optical fiber cladding mode by depositing nanofilm via ALD technology

Ying Zhao, Fufei Pang, Yanhua Dong, Jianxiang Wen, Zhenyi Chen, and Tingyun Wang  »View Author Affiliations

Optics Express, Vol. 21, Issue 22, pp. 26136-26143 (2013)

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The atomic layer deposition (ALD) technology is introduced to enhance the sensitivity of optical fiber cladding mode to surrounding refractive index (SRI) variation. The highly uniform Al2O3 nanofilm was deposited around the double cladding fiber (DCF) which presents cladding mode resonant feature. With the high refractive index coating, the cladding mode resonant spectrum was tuned. And the sensitivity enhancement for SRI sensor was demonstrated. Through adjusting the deposition cycles, a maximum sensitivity of 723 nm/RIU was demonstrated in the DCF with 2500 deposition cycles at the SRI of 1.34. Based on the analysis of cladding modes reorganization, the cladding modes transition of the coated DCF was investigated theoretically. With the high performance nanofilm coating, the proposed SRI sensor is expected to have wide applications in chemical sensors and biosensors.

© 2013 Optical Society of America

OCIS Codes
(060.2340) Fiber optics and optical communications : Fiber optics components
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(310.1860) Thin films : Deposition and fabrication

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: August 20, 2013
Revised Manuscript: October 9, 2013
Manuscript Accepted: October 14, 2013
Published: October 24, 2013

Ying Zhao, Fufei Pang, Yanhua Dong, Jianxiang Wen, Zhenyi Chen, and Tingyun Wang, "Refractive index sensitivity enhancement of optical fiber cladding mode by depositing nanofilm via ALD technology," Opt. Express 21, 26136-26143 (2013)

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