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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 31 — Nov. 1, 2011
  • pp: G7–G10

Polymer microfiber rings for high-sensitivity optical humidity sensing

Pan Wang, Fuxing Gu, Lei Zhang, and Limin Tong  »View Author Affiliations


Applied Optics, Vol. 50, Issue 31, pp. G7-G10 (2011)
http://dx.doi.org/10.1364/AO.50.0000G7


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Abstract

We demonstrate microrings assembled with polyacrylamide (PAM) microfibers for high-sensitivity relative humidity (RH) sensing. When exposed to moisture, the PAM microfiber absorbs water molecules and inflates monotonically with the increasing humidity, resulting in evident spectral shifts of the resonance peaks of the microring. By measuring the spectral shifts, the microring shows sensitivity as high as 490 pm / % RH and a response time of about 120 ms , within a dynamic range from 5% to 71% RH.

© 2011 Optical Society of America

OCIS Codes
(130.6010) Integrated optics : Sensors
(230.5750) Optical devices : Resonators
(130.5460) Integrated optics : Polymer waveguides

History
Original Manuscript: July 1, 2011
Manuscript Accepted: July 15, 2011
Published: September 9, 2011

Citation
Pan Wang, Fuxing Gu, Lei Zhang, and Limin Tong, "Polymer microfiber rings for high-sensitivity optical humidity sensing," Appl. Opt. 50, G7-G10 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-31-G7

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