Preparation and measurement of TFBG based vibration sensor

0507160 - ÚPT 2020 RIV US eng C - Conference Paper (international conference)
Helán, R. - Urban, F. - Mikel, Břetislav - Urban sr., F.
Preparation and measurement of TFBG based vibration sensor.
2nd International Conference on Applications of Optics and Photonics. Proceedings of SPIE. Vol. 9286. Bellingham: SPIE, 2014, č. článku 92864D. ISBN 978-1-62841-361-8. ISSN 0277-786X.
[International Conference on Applications of Optics and Photonics /2./. Aveiro (PT), 26.05.2014-30.05.2014]
R&D Projects: GA TA ČR(CZ) TA03010835
Institutional support: RVO:68081731
Keywords : vibration sensor * fiber Bragg grating * optical sensor * fiber sensor
OECD category: Optics (including laser optics and quantum optics)

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.
Permanent Link: http://hdl.handle.net/11104/0298357