Ultrasensitive photonic crystal fiber refractive index sensor
Optics Letters, Vol. 34, Issue 3, pp. 322-324 doi:10.1364/OL.34.000322
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- OCIS Codes:
- (060.2370) Fiber optics and optical communications : Fiber optics sensors
- (060.4005) Fiber optics and optical communications : Microstructured fibers
- (060.5295) Fiber optics and optical communications : Photonic crystal fibers
Fiber Optics and Optical Communications
Citation
Darran K. C. Wu, Boris T. Kuhlmey, and Benjamin J. Eggleton, "Ultrasensitive photonic crystal fiber refractive index sensor," Opt. Lett. 34, 322-324 (2009)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-34-3-322
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We introduce a microfluidic refractive index sensor based on a directional coupler architecture using solid-core photonic crystal fibers. The sensor achieves very high sensitivity by coupling the core mode to a mode in the adjacent fluid-filled waveguide that is beyond modal cutoff, and with strong field overlap. We demonstrate the device through the selective infiltration of a single hole with fluid along a microstructured optical fiber. A detection limit of 4.6×10−7 refractive index units has been derived from measurements with a sensitivity of 30,100 nm per refractive index unit, which is the highest for a fiber device to date.
© 2009 Optical Society of America
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History
Original Manuscript: November 11, 2008
Manuscript Accepted: December 5, 2008
Published: January 27, 2009
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Author Affiliations
University of Sydney
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