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The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including those from the School of Psychological Sciences & Health - but also papers by researchers based within the Faculties of Science, Engineering, Humanities & Social Sciences, and from the Strathclyde Business School.

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Investigation of erbium-doped fiber laser intra-cavity absorption sensor for gas detection

Zhang, Y. and Zhang, M. and Jin, W. and Ho, H.L. and Demokan, M.S. and Culshaw, B. and Stewart, G. (2004) Investigation of erbium-doped fiber laser intra-cavity absorption sensor for gas detection. Optics Communications, 232 (1-6). pp. 295-301. ISSN 0030-4018

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Abstract

Steady state theoretical analysis of an erbium-doped fiber laser intra-cavity absorption sensor shows that high sensitivity can be achieved when the laser is working near threshold but is limited by the spontaneous emission. Experiments are carried out using a linear cavity fiber laser. The general trends of experimental results agree with the theoretical prediction. The use of the intra-cavity sensor for gas detection is demonstrated. A sensitivity of 91 times that of a single-pass absorption sensor is achieved.