Share Email Print
cover

Proceedings Paper

Effective refractive index modulation based optical fiber humidity sensor employing etched fiber Bragg grating
Author(s): Pathi Mundendhar; Sunil K. Khijwania
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Relative humidity (RH) sensor employing etched fiber Bragg grating (FBG) is reported where RH variations are captured using effective-index-modulation, rather than traditional strain-modulation. Additionly, linear sensor response over wide dynamic range with optimum characteristics is focused. Comprehensive experimental investigation is carried out for the sensor that comprises uniformly etched cladding in the FBG region. Obtained results are observed to be in agreement with the theoretical analysis. Sensor response is observed to be linear over dynamic range 3–94%RH with ~ 0.082 pm/%RH sensitivity, ~0.6%RH resolution, ~ ±2.5%RH accuracy, ~ ±0.2 pm average discrepancy and ~ 0.2s response time during humidification/desiccation.

Paper Details

Date Published: 28 September 2015
PDF: 4 pages
Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96343V (28 September 2015); doi: 10.1117/12.2195225
Show Author Affiliations
Pathi Mundendhar, Indian Institute of Technology Guwahati (India)
Sunil K. Khijwania, Indian Institute of Technology Guwahati (India)


Published in SPIE Proceedings Vol. 9634:
24th International Conference on Optical Fibre Sensors
Hypolito José Kalinowski; José Luís Fabris; Wojtek J. Bock, Editor(s)

© SPIE. Terms of Use
Back to Top