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Title: Cascaded photonic crystal fiber interferometers for refractive index sensing
Authors: Lim, Jun Long
Hu, Dora Juan Juan
Shum, Perry Ping
Wang, Yixin
Keywords: DRNTU::Engineering::Electrical and electronic engineering
Issue Date: 2012
Series/Report no.: IEEE photonics journal
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.
ISSN: 1943-0655
DOI: 10.1109/JPHOT.2012.2205911
Rights: © 2012 IEEE
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:EEE Journal Articles

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