Fibre laser torsion sensor system using an excessively tilted fibre grating and low-cost time domain demodulation


In this paper, we report a simple fibre laser torsion sensor system using an intracavity tilted fibre grating as a torsion encoded loss filter. When the grating is subjected to twist, it induces loss to the cavity, thus affecting the laser oscillation build-up time. By measuring the build-up time, both twist direction and angle on the grating can be monitored. Using a low-cost photodiode and a two-channel digital oscilloscope, we have characterised the torsion sensing capability of this fibre laser system and obtained a torsion sensitivity of ~412µs/(rad/m) in the dynamic range from -150° to +150°.

Publication DOI:
Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Additional Information: Chengbo Mou ; Kaiming Zhou ; Rui Suo ; Lin Zhang and Ian Bennion, "Fibre laser torsion sensor system using an excessively tilted fibre grating and low-cost time domain demodulation", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75033E (October 05, 2009); doi:10.1117/12.833595; Copyright 2009 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Event Title: 20th International Conference on Optical Fibre Sensors
Event Type: Other
Event Dates: 2009-10-05 - 2009-10-09
Uncontrolled Keywords: torsion sensor,fibre laser,tilted fibre grating,photonics,Computer Science Applications,Electrical and Electronic Engineering,Electronic, Optical and Magnetic Materials,Applied Mathematics,Condensed Matter Physics
ISBN: 978-0-8194-7814-6
Last Modified: 08 Jul 2024 08:34
Date Deposited: 17 Jun 2015 12:42
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
http://proceedi ... ticleid=1342493 (Publisher URL)
PURE Output Type: Conference contribution
Published Date: 2009-10-05
Authors: Mou, Chengbo (ORCID Profile 0000-0001-6107-3439)
Zhou, Kaiming (ORCID Profile 0000-0002-6011-1912)
Suo, Rui
Zhang, Lin (ORCID Profile 0000-0002-1691-5577)
Bennion, Ian



Version: Published Version

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