Fiber laser incorporating an intracavity micro-channel for refractive index and temperature sensing


In this letter, we present a standard linear cavity fiber laser incorporating a microchannel for refractive index (RI) and temperature sensing. The microchannel of ~6µm width created by femtosecond laser aided chemical etching provides an access to the external liquid; therefore, the laser cavity loss changes with the liquids of different RIs. Thus, at a fixed pump power, the output laser power will vary with the change of RI in the microchannel. The results show that the proposed sensing system has a linear response to both the surrounding medium RI and temperature. The RI sensitivity of the laser system is on the order of 10-3, while the temperature sensitivity is about 0.02 C. Both sensitivities could be further enhanced by employing a more sensitive photodetector and using higher pump power.

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Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Additional Information: ©2009 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Uncontrolled Keywords: femtosecond laser,fiber laser sensor,microchannel,refractive index sensor,fibre lasers,fibre optic sensors,photodetectors,refractive index,temperature sensors,Electrical and Electronic Engineering,Electronic, Optical and Magnetic Materials,Atomic and Molecular Physics, and Optics
Publication ISSN: 1941-0174
Last Modified: 09 Jan 2024 08:06
Date Deposited: 03 Dec 2012 10:24
Full Text Link: http://ieeexplo ... r=5223522&tag=1
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2009-10-15
Authors: Mou, Chengbo (ORCID Profile 0000-0001-6107-3439)
Zhou, Kaiming (ORCID Profile 0000-0002-6011-1912)
Davies, Edward
Zhang, Lin (ORCID Profile 0000-0002-1691-5577)
Bennion, Ian


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