Multiwavelength operation of erbium-doped fiber lasers by periodic filtering and phase modulation

M.A. Mirza, G. Stewart

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)
289 Downloads (Pure)


This paper explains the principles behind multiwavelength operation of an erbium-doped fiber laser (EDFL) under the combined effect of cavity phase modulation and periodic wavelength filtering. A mathematical model is developed to simulate the behaviour of the multiwavelength EDFL, both in time and frequency domains. The effects of various parameters such as pump power, filter channel spacing, modulation index and frequency are observed and explained. An all-fiber EDFL was constructed, using a piezo-transducer-based phase modulator and a Sagnac loop periodic filter, to validate the theoretical results. The effects of pump power, modulation frequency and modulation index were monitored experimentally, justifying the theoretical explanation. The multiwavelength EDFL has several potential applications in fiber sensing due to its flexible all-fiber design.
Original languageEnglish
Pages (from-to)1034-1044
Number of pages11
JournalJournal of Lightwave Technology
Issue number8
Publication statusPublished - 15 Apr 2009


  • erbium-doped fiber lasers (EDFL)
  • multiwavelength fiber laser
  • phase modulation
  • sagnac loop filter

Cite this