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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 5, Iss. 11 — Aug. 25, 2010

Microfiber-probe-based ultrasmall interferometric sensor

Jun-long Kou, Jing Feng, Qian-jin Wang, Fei Xu, and Yan-qing Lu  »View Author Affiliations


Optics Letters, Vol. 35, Issue 13, pp. 2308-2310 (2010)
http://dx.doi.org/10.1364/OL.35.002308


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Abstract

We report an ultrasmall microfiber-probe-based reflective interferometer for highly sensitive liquid refractive index measurement. It has a 3.5 μm micronotch cavity fabricated by focused ion beam micromachining. A sensitivity of 110 nm / RIU (refractive index unit) in liquid is achieved with over 20 dB extinction ratio. Theoretical analysis shows this kind of device is a hybrid of Fabry–Perot and modal interferometers. In comparison with normal fiber interferometers, this probe sensor is very compact, stable, and cheap, offering great potentials for detecting inside sub-wavelength bubbles, droplets, or biocells.

© 2010 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:
Diffraction and Gratings

History
Original Manuscript: April 22, 2010
Manuscript Accepted: June 1, 2010
Published: June 30, 2010

Virtual Issues
Vol. 5, Iss. 11 Virtual Journal for Biomedical Optics

Citation
Jun-long Kou, Jing Feng, Qian-jin Wang, Fei Xu, and Yan-qing Lu, "Microfiber-probe-based ultrasmall interferometric sensor," Opt. Lett. 35, 2308-2310 (2010)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ol-35-13-2308

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