An injection-locked single-longitudinal-mode fiber ring laser with cylindrical vector beam emission

Hongdan Wan*, Hongye Li, Changle Wang, Bing Sun, Zuxing Zhang, Wei Wei, Lin Zhang

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

We demonstrate a fiber ring laser with narrow bandwidth single-longitudinal-mode cylindrical vector beam (CVB) output at C-band wavelength range for the first time to the best of our knowledge. A step index two-mode fiber Bragg grating is used as a transverse mode selector for CVB generation, while both the injection-locking technique and narrow bandwidth of the fiber Bragg grating lead to single-longitudinal-mode operation. The 3-dB bandwidth of the laser output is measured to be <0.01 nm near a single wavelength of 1551.4 nm with a signal-to-background ratio of >60 dB. Mode distribution and optical spectra of few-mode fibers with periodic modulated refractive index profile, namely the few-mode fiber Bragg gratings with bent radius, are investigated theoretically and experimentally, which provide a comprehensive exploration of CVB's generation.

Original languageEnglish
Article number7100608
Number of pages8
JournalIEEE Photonics Journal
Volume9
Issue number1
Early online date16 Jan 2017
DOIs
Publication statusPublished - Feb 2017

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Keywords

  • fiber gratings
  • Fiber laser
  • Optical fiber devices

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