A new absorption sensor is developed using a photonic crystal fiber with enhanced evanescent field. Excellent linearity is obtained between absorbance and concentration/length. The sensitivity is increased by 60 times compared with perpendicular direction measurement.
© 2008 Optical Society of America
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.5295) Fiber optics and optical communications : Photonic crystal fibers
X. Yu, Y. Sun, and P. Shum, "Evanescent Field Absorption Sensor in Aqueous Solutions Using a Defected-Core Photonic Crystal Fiber," in Optical Fiber Communication Conference/National Fiber Optic Engineers Conference, OSA Technical Digest (CD) (Optical Society of America, 2008), paper JThA20.
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