TY - GEN

T1 - New schemes and regimes of CW and pulsed Raman fiber lasers

AU - Babin, Sergey A.

PY - 2018/1/1

Y1 - 2018/1/1

N2 - A review of recent results on new schemes and regimes of Raman fiber lasers (RFL) is presented. The key feature of RFLs is generation in new wavelength ranges, which are not covered by existing fiber lasers based on rare-earth doped active fibers. New high-brightness 9.. nm all-fiber source based on directly diode pumped passive GRIN multimode fiber with in-core fiber Bragg gratings (FBGs) enables high-efficiency Raman generation of high-quality (M2≤2.6) beam at powers up to ∼100 W with further scaling capabilities. Mirrorless scheme based on Rayleigh-backscattering random distributed feedback (RDFB) in a singlemode polarization-maintaining (PM) fiber provides ultimate pump-to-Stokes conversion efficiency for the first order as well as cascaded generation of higher orders in 1-2 μm range. Single-frequency Raman lasing in a short (∼10 m) PM fiber with RDFB based on random FBG array has been also demonstrated. Pulsed operation of RFL at active Q-switching and mode-locking in passive fibers is realized with pulse energies and durations of up to 30 μJ and ∼50 ps, correspondingly. New regime of Raman dissipative solitons (of the first and second Stokes orders) synchronously generated in a common or external resonant cavity and their nonlinear mixing in PCF provide generation of <300 femtosecond pulses with ∼10 nJ energy at new wavelengths in 900-1300 nm range.

AB - A review of recent results on new schemes and regimes of Raman fiber lasers (RFL) is presented. The key feature of RFLs is generation in new wavelength ranges, which are not covered by existing fiber lasers based on rare-earth doped active fibers. New high-brightness 9.. nm all-fiber source based on directly diode pumped passive GRIN multimode fiber with in-core fiber Bragg gratings (FBGs) enables high-efficiency Raman generation of high-quality (M2≤2.6) beam at powers up to ∼100 W with further scaling capabilities. Mirrorless scheme based on Rayleigh-backscattering random distributed feedback (RDFB) in a singlemode polarization-maintaining (PM) fiber provides ultimate pump-to-Stokes conversion efficiency for the first order as well as cascaded generation of higher orders in 1-2 μm range. Single-frequency Raman lasing in a short (∼10 m) PM fiber with RDFB based on random FBG array has been also demonstrated. Pulsed operation of RFL at active Q-switching and mode-locking in passive fibers is realized with pulse energies and durations of up to 30 μJ and ∼50 ps, correspondingly. New regime of Raman dissipative solitons (of the first and second Stokes orders) synchronously generated in a common or external resonant cavity and their nonlinear mixing in PCF provide generation of <300 femtosecond pulses with ∼10 nJ energy at new wavelengths in 900-1300 nm range.

KW - beam clean-up

KW - cascaded Raman laser

KW - diode pumping

KW - fiber Bragg grating

KW - fiber laser

KW - frequency mixing

KW - graded-index fiber

KW - Raman dissipative soliton

KW - Raman laser

KW - random FBG

KW - random lasing

KW - POWER

KW - GENERATION

KW - HIGH-EFFICIENCY

UR - http://www.scopus.com/inward/record.url?scp=85050231469&partnerID=8YFLogxK

U2 - 10.1117/12.2309634

DO - 10.1117/12.2309634

M3 - Conference contribution

AN - SCOPUS:85050231469

VL - 10637

T3 - Proceedings of SPIE

BT - Laser Technology for Defense and Security XIV

A2 - Dubinskiy, M

A2 - Newell, TC

PB - SPIE

T2 - Laser Technology for Defense and Security XIV 2018

Y2 - 17 April 2018 through 18 April 2018

ER -