Power-referenced refractometer based on hybrid fiber grating
Shum, Perry Ping
Date of Issue2013
International Conference on Optical Instruments and Technology : Optical Sensors and Applications 2013
School of Electrical and Electronic Engineering
Research Techno Plaza
A power-referenced fiber refractometer based on a hybrid fiber grating formed by a tilted-fiber Bragg grating (TFBG) cascading by a chirped-fiber Bragg grating (CFBG) is proposed and experimentally demonstrated. The optical signal reflected by the CFBG passes twice through the TFBG that enhances sensitivity of the refractometer. In addition, the optical signal is propagating all the way in the fiber core so that the extra insertion loss is low. Refractive index measurement with sensitivity up to 597.2 μW/R.I.U. is achieved within the range from 1.333 to ~1.42. The maximum detectable refractive index is ~1.45.
DRNTU::Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics
© 2013 SPIE. This paper was published in 2013 International Conference on Optical Instruments and Technology: Optical Sensors and Applications and is made available as an electronic reprint (preprint) with permission of SPIE. The paper can be found at the following official DOI: http://dx.doi.org/10.1117/12.2037187. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.