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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 37, Iss. 18 — Sep. 15, 2012
  • pp: 3873–3875

Ultrasensitive label-free coupled optofluidic ring laser sensor

Liqiang Ren, Xiang Wu, Ming Li, Xingwang Zhang, Liying Liu, and Lei Xu  »View Author Affiliations


Optics Letters, Vol. 37, Issue 18, pp. 3873-3875 (2012)
http://dx.doi.org/10.1364/OL.37.003873


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Abstract

A coupled optofluidic ring laser sensor is fabricated, and its ultrasensitive bulk refractive index and surface mass sensing properties are demonstrated. The sensor consists of a cylindrical ring laser and a thin-walled optofluidic capillary ring resonator. Coupling of the whispering gallery mode in the two resonators generates a largely magnified sensitivity due to the Vernier effect. A sensitivity of 2510nm/RIU and magnification factor of 355 are achieved experimentally in aqueous solution, which corresponds to a noise equivalent detection limit of 1.6×105RIU for bulk RI detection. The new sensor configuration provides a convenient way to achieve ultrasensitive biological and chemical sensing.

© 2012 Optical Society of America

OCIS Codes
(140.4780) Lasers and laser optics : Optical resonators
(140.3948) Lasers and laser optics : Microcavity devices
(230.4555) Optical devices : Coupled resonators
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: July 11, 2012
Revised Manuscript: August 4, 2012
Manuscript Accepted: August 4, 2012
Published: September 14, 2012

Virtual Issues
Vol. 7, Iss. 11 Virtual Journal for Biomedical Optics

Citation
Liqiang Ren, Xiang Wu, Ming Li, Xingwang Zhang, Liying Liu, and Lei Xu, "Ultrasensitive label-free coupled optofluidic ring laser sensor," Opt. Lett. 37, 3873-3875 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-18-3873


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