title: Four-wave mixing in nanosecond pulsed fiber amplifiers.
abstract: We present an experimental and theoretical analysis of four-wave mixing in nanosecond pulsed amplifiers based on double-clad ytterbium-doped fibers. This process leads to saturation of the amplified pulse energy at 1064 nm and to distortion of the spectral and temporal profiles. These behaviours are well described by a simple model considering both Raman and four-wave-mixing contributions. The role of seed laser polarization in birefringent fibers is also presented. These results point out the critical parameters and possible tradeoffs for optimization.
authors.affiliation: Teem Photonics, 61 chemin du Vieux Chêne, 38246 MEYLAN. jean-philippe.feve@jdsu.com
authors.forename: Jean-Philippe
authors.initials: JP
authors.lastname: Fève
authors.forename: Paul E
authors.initials: PE
authors.lastname: Schrader
authors.forename: Roger L
authors.initials: RL
authors.lastname: Farrow
authors.forename: Dahv A V
authors.initials: DA
authors.lastname: Kliner