title: 1.38-µm mode-locked Raman fiber laser pumped by semiconductor disk laser.
abstract: A mode-locked Raman fiber laser pumped by 1.3 µm semiconductor disk laser is demonstrated. Direct Watt-level core-pumping of the single-mode fiber Raman lasers and amplifiers with low-noise disk lasers is demonstrated to represent a highly practical solution as compared with conventional scheme using pumping by Raman wavelength convertors. Raman laser employing passive mode-locking by nonlinear polarization evolution in normal dispersion regime produces stable pedestal-free 1.97 ps pulses at 1.38 µm. Using semiconductor disk lasers capable of producing high power with diffraction-limited beam allows Raman gain to be obtained at virtually any wavelength of interest owing to spectral versatility of semiconductor gain materials and wafer-fusing technology.
authors.affiliation: Optoelectronics Research Centre, Tampere University of Technology, Korkeakoulunkatu 3, 33720 Tampere, Finland. alexander.chamorovskiy@tut.fi
authors.forename: A
authors.initials: A
authors.lastname: Chamorovskiy
authors.forename: A
authors.initials: A
authors.lastname: Rantamäki
authors.forename: A
authors.initials: A
authors.lastname: Sirbu
authors.forename: A
authors.initials: A
authors.lastname: Mereuta
authors.forename: E
authors.initials: E
authors.lastname: Kapon
authors.forename: O G
authors.initials: OG
authors.lastname: Okhotnikov