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A review of photonic crystal fiber sensors with microbubble is presented. The work concentrate in three sensing fields: the first reports on temperature sensing; the second describes on strain sensing; the last part focuses on refractive index sensing and bio-sensing. The method of fabricating the microbubble is also briefly discussed.
Suspended-core fiber (SCF) represents a promising class of microstructured optical fibers for sensing applications. In this work, we present a thorough modal analysis of the SCF based modal interferometer which is constructed by splicing 50 mm of SCF to single mode fiber at both ends. The measured transmission spectrum exhibits three-beam interference-like spectrum. In the modal analysis, we investigate...
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...
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