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Proceedings Paper

Preparation and measurement of TFBG based vibration sensor
Author(s): Radek Helan; Frantisek Urban Jr.; Bretislav Mikel; Frantisek Urban Sr.
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Paper 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.

Paper Details

Date Published: 22 August 2014
PDF: 6 pages
Proc. SPIE 9286, Second International Conference on Applications of Optics and Photonics, 92864D (22 August 2014); doi: 10.1117/12.2063440
Show Author Affiliations
Radek Helan, PROFIcomms s.r.o. (Czech Republic)
Frantisek Urban Jr., PROFIcomms s.r.o. (Czech Republic)
Bretislav Mikel, Institute of Scientific Instruments of the ASCR, v.v.i. (Czech Republic)
Frantisek Urban Sr., PROFIcomms s.r.o. (Czech Republic)

Published in SPIE Proceedings Vol. 9286:
Second International Conference on Applications of Optics and Photonics
Manuel Filipe P. C. Martins Costa; Rogério Nunes Nogueira, Editor(s)

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