Preparation and measurement of TFBG based vibration sensor

Radek Helan; Frantisek Urban Jr.; Bretislav Mikel; Frantisek Urban Sr.

doi:10.1117/12.2063440

22 August 2014 Preparation and measurement of TFBG based vibration sensor

Radek Helan, Frantisek Urban Jr., Bretislav Mikel, Frantisek Urban Sr.

Proceedings Volume 9286, Second International Conference on Applications of Optics and Photonics; 92864D (2014) https://doi.org/10.1117/12.2063440
Event: Second International Conference on Applications of Optics and Photonics, 2014, Aveiro, Portugal

Abstract

We present vibration fiber sensor set up based on tilted fiber Bragg grating (TFBG) and fiber taper. The sensor uses the TFBG as a cladding modes reflector and fiber taper as a bend-sensitive recoupling member. The lower cladding modes (ghost), reflected from TFBG, is recoupled back into the fiber core via tapered fiber section. We focused on optimization of TFBG tilt angle to reach maximum reflection of the ghost and taper parameters. Comparative measurements were made using optical spectrum analyzer and superluminiscent diode as broadband light source. We present dependence between intensity of recoupled ghost mode and sensor deflection.

Citation Download Citation

Radek Helan, Frantisek Urban Jr., Bretislav Mikel, and Frantisek Urban Sr. "Preparation and measurement of TFBG based vibration sensor", Proc. SPIE 9286, Second International Conference on Applications of Optics and Photonics, 92864D (22 August 2014); https://doi.org/10.1117/12.2063440

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