title: Multiwavelength Raman fiber laser with a continuously-tunable spacing.
abstract: A spacing-tunable multiwavelength Raman fiber laser with an independently-adjustable channel number is proposed and demonstrated. It uses a novel free-spectral-range (FSR)-tunable comb filter based on a superimposed chirped-fiber Bragg grating (CFBG) and a linear cavity formed by a bandwidth-tunable CFBG reflector, a pumped highly-nonlinear fiber for Raman gain, and an optical circulator based loop mirror. Multiwavelength laser operations with spacing tuning from 0.3 to 0.6 nm and channel number adjustment from 2 to 10 have been achieved.
authors.forename: Xinyong
authors.initials: X
authors.lastname: Dong
authors.forename: P
authors.initials: P
authors.lastname: Shum
authors.forename: N Q
authors.initials: NQ
authors.lastname: Ngo
authors.forename: C C
authors.initials: CC
authors.lastname: Chan