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This paper presents a cascaded fiber interferometer sensor, which is fabricated by fusion splicing of single-mode fibers. The coupling and interference for the CFI were mathematically and experimentally studied. An equal model has been built for the CFI. Furthermore, the curvature sensitivity were explored in sensor application. The curvature sensitivity for the cascaded fiber interferometer is very...
We demonstrate an arc discharge fabrication method for a high extinction-ratio (ER) single mode fiber (SMF) based dual thin-taper modal interferometer (MI) and investigate the performance of the MI as thermal and refractive index (RI) sensors. With the optimized discharge parameters of a commercial fusion splicer and a simple mechanical taper setup, the MI with about 24dB ER could be achieved if fabricating...
The thermal characteristics of the ethanol-filled hollow core photonic crystal fiber (HCPCF) based modal interferometer (MI) is investigated theoretically and experimentally. The effective refractive index difference between the interference modes and thermal sensitivity are improved greatly after filling ethanol solution into the air core and claddings of the HCPCF.
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