Cascaded Photonic Crystal Fiber Interferometers for Refractive Index Sensing | IEEE Journals & Magazine | IEEE Xplore

Cascaded Photonic Crystal Fiber Interferometers for Refractive Index Sensing


Abstract:

We present a cascaded fiber device based on photonic crystal fiber (PCF) interferometers for refractive index (RI) sensing. The PCF modal interferometers have microbubble...Show More

Abstract:

We present a cascaded fiber device based on photonic crystal fiber (PCF) interferometers for refractive index (RI) sensing. The PCF modal interferometers have microbubbles at both sides of the splice regions. The microbubbles act as thick diverging lens that scatter light for efficient excitation of higher order cladding modes and attenuation of the core modes in the transmitted spectrum. Three resonance wavelengths are monitored, and their corresponding RI sensitivities are found to be 252, 187, and 207 nm/refractive index unit (RIU). The results, to our best knowledge, demonstrate that PCF interferometers with microbubbles are repeatable for high RI sensitivity, and the best crosstalk achievable is 0.295 nm/RIU.
Published in: IEEE Photonics Journal ( Volume: 4, Issue: 4, August 2012)
Page(s): 1163 - 1169
Date of Publication: 25 June 2012

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