Multi-wavelength gain-switched Yb-doped fiber laser

R. V. Drobyshev, A. M. Volikova, I. A. Lobach, S. I. Kablukov

Research output: Contribution to journalArticlepeer-review

Abstract

We present a technique for suppression of wavelength competition in rare-earth-doped fiber lasers and for obtaining simultaneous lasing at tens (up to several hundred) of laser lines with wavelength spacing down to 50 pm. An ytterbium-doped fiber laser is used for experimental demonstration. Spectral selection is based on a built-in Lyot filter whose length can be selected to set suitable wavelength spacing. The measured linewidth for each of the generated lines is less than 100 pm and can be as little as 20 pm. The method for mode competition suppression is based on the gain-switching technique with modulated pump. At certain modulation parameters (amplitude, duration, and repetition rate), the laser generates a stable sequence of microsecond pulses with ∼1 W peak power and ∼4 μJ energy consisting of many longitudinal modes.

Original languageEnglish
Article number065102
Number of pages6
JournalLaser Physics Letters
Volume17
Issue number6
DOIs
Publication statusPublished - 1 Jun 2020

Keywords

  • fibre laser
  • gain-switching
  • Lyot filter
  • multi-wavelength generation

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