Share Email Print

Proceedings Paper

Dopants concentration effects on the wavelength shift of long-period fiber gratings used as liquid level detectors
Author(s): Barerem-Melgueba Mao; Bin Zhou
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

Two liquid level sensors based on different long-period fiber gratings are proposed and compared. The long-period gratings have the same characteristics (length, grating period) but are fabricated in different optical fibers (photosensitive B-Ge codoped optical fibers with different dopants concentrations). The principle of this type of sensor is based on the refractive index sensitivity of long-period fiber gratings. By monitoring the resonant wavelength shifts of a given attenuation band, one can measure the immersed lengths of long-period fiber gratings and then the liquid level. The levels of two different solutions are measured. The maximum shift (7.69 nm) of the investigated resonance wavelength was observed in LPG1 (fabricated in Fibercore PS1250/1500). By controlling the fiber dopants concentrations one can improve the readouts of a fiber-optic liquid level sensor based on long-period fiber gratings.

Paper Details

Date Published: 29 November 2011
PDF: 6 pages
Proc. SPIE 8307, Passive Components and Fiber-Based Devices VIII, 83070W (29 November 2011); doi: 10.1117/12.904611
Show Author Affiliations
Barerem-Melgueba Mao, Zhejiang Univ. (China)
Bin Zhou, Zhejiang Univ. (China)

Published in SPIE Proceedings Vol. 8307:
Passive Components and Fiber-Based Devices VIII
Bishnu P. Pal, Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?