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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 7, Iss. 11 — Oct. 31, 2012

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)

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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

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

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)

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