title: Linearly-polarized single-transverse-mode high-energy multi-ten nanosecond fiber amplifier with 50W average power.
abstract: A linearly polarized single-transverse-mode Yb-doped double clad polarization-maintaining fiber amplifier at 1064nm is reported, which delivers 53.1W average power at 40kHz repetition rate, with pulse energy >1mJ, duration 30ns, polarization extinction ratio 13dB, and M(2)1.2. Stimulated Brillouin scattering (SBS) phenomenon during amplification is discussed, and a new SBS suppression approach using linewidth broadening induced by self-phase modulation (SPM) is demonstrated.
authors.forename: Changgeng
authors.initials: C
authors.lastname: Ye
authors.forename: Mali
authors.initials: M
authors.lastname: Gong
authors.forename: Ping
authors.initials: P
authors.lastname: Yan
authors.forename: Qiang
authors.initials: Q
authors.lastname: Liu
authors.forename: Gang
authors.initials: G
authors.lastname: Chen