Using optimal cavity loss and saturable-absorber passive filter for stable and tunable dual-wavelength erbium fiber laser in single-longitudinal-mode operation

C. H. Yeh*, Chi Wai Chow, Y. F. Wu, Y. H. Lin, B. C. Cheng, J. H. Chen

*Corresponding author for this work

Research output: Contribution to journalArticle

30 Scopus citations

Abstract

In this investigation, we propose and demonstrate experimentally tunable and stable dual-wavelength erbium doped fiber (EDF) double-ring laser scheme using different coupling losses inside cavity loop for wavelength and mode spacing tuning. Besides, a shorter unpumped EDF is also used to filter the side-modes for lasing wavelength in singlelongitudinal-mode (SLM) operation. However, the output mode spacing of dual-wavelength could be limited owing to the homogeneous broadening nature of EDF. As a result, the output performance of the proposed fiber laser have also been analyzed and discussed, such as wavelength tuning range, output power, side-mode suppression ratio (SMSR), stabilities of lasing wavelength and power, relative intensity noise (RIN), etc.

Original languageEnglish
Pages (from-to)672-677
Number of pages6
JournalLaser Physics Letters
Volume8
Issue number9
DOIs
StatePublished - 1 Sep 2011

Keywords

  • Dual-wavelength
  • Erbium-doped fiber (EDF)
  • Fiber laser
  • Single-longitudinal-mode (SLM)

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