Fibre laser using a microchannel based loss tuning element for refractive index sensing

Mou, Chengbo, Zhou, Kaiming, Davies, Edward, Zhang, Lin and Bennion, Ian (2009). Fibre laser using a microchannel based loss tuning element for refractive index sensing. IN: 20th international conference on optical fibre sensors. Jones, Julian D.C.; Culshaw, Brian; Ecke, Wolfgang; López-Higuera, José M. and Willsch, Reinhardt (eds) SPIE proceedings, 7503 . SPIE.


We have proposed and demonstrated a fibre laser system using a microchannel as a cavity loss tuning element for surrounding medium refractive index (SRI) sensing. A ~6µm width microchannel was created by femtosecond (fs) laser inscription assisted chemical etching in the cavity fibre, which offers a direct access to the external liquids. When the SRI changes, the microchannel behaves as a loss tuning element, hence modulating the laser cavity loss and output power. The results indicate that the presented laser sensing system has a linear response to the SRI with a sensitivity in the order of 10-5. Using higher pump power and more sensitive photodetector, the SRI sensitivity could be further enhanced.

Publication DOI:
Divisions: Engineering & Applied Sciences > Electrical, Electronic & Power Engineering
Engineering & Applied Sciences > Aston Institute of Photonics Technology
Additional Information: Chengbo Mou ; Kaiming Zhou ; Edward Davies ; Lin Zhang and Ian Bennion "Fibre laser using a microchannel based loss tuning element for refractive index sensing", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75035D (October 05, 2009); doi:10.1117/12.834749. 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: photonics,femtosecond laser,microchannel,fibre laser,refractive index sensor,Computer Science Applications,Electrical and Electronic Engineering,Electronic, Optical and Magnetic Materials,Applied Mathematics,Condensed Matter Physics
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
http://proceedi ... ticleid=1342503 (Publisher URL)
Published Date: 2009-10-05
Authors: Mou, Chengbo ( 0000-0001-6107-3439)
Zhou, Kaiming ( 0000-0002-6011-1912)
Davies, Edward
Zhang, Lin ( 0000-0002-1691-5577)
Bennion, Ian



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