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Now coupling interferometer structure based on photonic crystal fiber (PCF) gets extensive attention in hydrogen sensing. Because of its structural stability, high sensitivity characteristics, it has achieved good results in the hydrogen sensor, when combine with the hydrogen-sensitive film such as Pd-WO3. In the initial experiment, the hydrogen sensor based on PCF coated with Pd-WO3 showed good linearity...
A novel refractive index (RI) sensor based on an asymmetrical Mach-Zehnder interferometer (MZI) with two different step-like tapers is proposed. The step-like taper is fabricated by fusion splicing two half tapers with an appropriate offset. By further applying offset and discharging to the last fabricated step-like taper of MZI, influence of taper parameters on interference spectrum is investigated...
We report on a curvature sensor based on a long-period grating in a dual-concentric-core fiber. By measuring the relative shifting of two adjacent resonant dips, the curvature sensitivity reaches 7.635 nm/m−1.
A miniature refractive index sensor formed by a high quality (Q-) photonic crystal (PhC) cavity based fiber loop ring-down (FLRD) was demonstrated. To the best of our knowledge, this technology has not been reported. The ring-down time would be changed with the transmittance of PhC cavity, which is related to the refractive index of the infiltrated liquids. By using the finite-difference time-domain...
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