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

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

Research output: Journal article publicationJournal articleAcademic researchpeer-review

33 Citations (Scopus)


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 90 times that of a single-pass absorption sensor is achieved.
Original languageEnglish
Pages (from-to)295-301
Number of pages7
JournalOptics Communications
Issue number1-6
Publication statusPublished - 1 Mar 2004


  • Absorption spectroscopy
  • Fiber optics sensors
  • Laser sensors

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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