Random Raman fiber laser based on a twin-core fiber with FBGs inscribed by femtosecond radiation

M. I. Skvortsov, S. R. Abdullina, A. A. Wolf, A. V. Dostovalov, A. A. Vlasov, I. A. Lobach, S. Wabnitz, S. A. Babin

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Narrowband Raman lasing in a polarization-maintaining two-core fiber (TCF) is demonstrated. Femtosecond point-by-point inscription of fiber Bragg gratings (FBGs) in individual cores produces a half-open cavity with random distributed feedback. The laser linewidth in the cavity with a single FBG inscribed in one core of the TCF reduced by ∼2 times with respect to the cavity with a fiber loop mirror. It is shown that the inscription of two FBGs in different cores leads to the formation of a Michelson-type interferometer, leading to the modulation of generation spectra near threshold. This technique offers new possibilities for spectral filtering or multi-wavelength generation.

Original languageEnglish
Pages (from-to)295-298
Number of pages4
JournalOptics Letters
Volume44
Issue number2
DOIs
Publication statusPublished - 15 Jan 2019

Keywords

  • DISTRIBUTED-FEEDBACK
  • BRAGG GRATINGS
  • POWER

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