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

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...

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Bibliographic Details
Published inOptics communications Vol. 234; no. 1; pp. 435 - 441
Main Authors Zhang, Y., Zhang, M., Jin, W., Ho, H.L., Demokan, M.S., Fang, X.H., Culshaw, B., Stewart, G.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.04.2004
Subjects
Absorption spectroscopy
Fiber optics sensors
Laser sensors
Laser sensors
Absorption spectroscopy
Fiber optics sensors
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Summary: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.
ISSN:0030-4018
1873-0310
DOI:10.1016/j.optcom.2004.02.046