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

Y. Zhang, M. Zhang, W. Jin, H.L. Ho, M.S. Demokan, B. Culshaw, G. Stewart

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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.
Original languageEnglish
Pages (from-to)295-301
Number of pages6
JournalOptics Communications
Issue number1-6
Publication statusPublished - 2004



  • fiber optics sensors
  • laser sensors
  • absorption spectroscopy
  • fiber optics
  • spectroscopy

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