title: Ultrawide-range four-wave mixing in Raman distributed-feedback fiber lasers.
abstract: We report ultrawide-range and highly efficient wavelength conversion by exploiting four-wave mixing (FWM) in Raman distributed-feedback (R-DFB) fiber lasers. The lasers are 30 cm long center π phase-shifted DFB gratings UV written in commercially available germano-silica (Ge/Si) single-mode fibers (PS980 from Fibercore Ltd., and UHNA4 from Nufern). The R-DFB lasing signal acts as a pump wave for the FWM process within the DFB cavity, and the obtained FWM conversion efficiency is around -25 dB with a maximum wavelength conversion range of 112 nm.
authors.affiliation: Optoelectronics Research Centre, University of Southampton, Highfield, Southampton, UK. jxs@orc.soton.ac.uk
authors.forename: Jindan
authors.initials: J
authors.lastname: Shi
authors.forename: Shaif-ul
authors.initials: SU
authors.lastname: Alam
authors.forename: Morten
authors.initials: M
authors.lastname: Ibsen