A multiwavelength generation in a random distributed feedback fiber laser based on hybrid Raman and erbium gain and a Lyot all-fiber spectral filter is demonstrated for the first time. The use of erbium-doped fiber allows a multi-wavelength generation to be achieved at lower pump powers in comparison with random fiber lasers based on Raman gain only. The operating bandwidth and flatness of power distribution between different lines in generation are also improved in the hybrid gain configuration.
Bibliographical noteFunding: ERC (UltraLaser); Russian Ministry of Education and Science (14.B25.31.0003); Russian Foundation for Basic Research (15-02-07925); Presidential Grant for Young researchers (18.104.22.168-MK); Ministry of Education of Malaysia (MOHE); and University of Malaya (grant UM.C/625/1/HIR/MOHE/SC/29/01).
- fiber lasers
- random lasers
- stimulated Raman