title: Polarisation maintaining 100W Yb-fiber MOPA producing microJ pulses tunable in duration from 1 to 21 ps.
abstract: This paper demonstrates a single polarisation, 1.06 microm Yb-doped fiber MOPA, delivering 21 ps pulses in a diffraction limited beam at repetition rates of up to 908 MHz and average output power of 100 W. The maximum pulse energy was 1.7 microJ at a repetition rate of 56 MHz, with corresponding peak power of 85 kW. The 100 W power was limited by available diode pump power and scaling to higher power levels is discussed. We also report self-phase-modulation based pulse compression which produced pulse durations as short as 1.1 ps from an external grating compressor. Using 4.2 ps pulses at a repetition rate of 227 MHz enabled 26 W of visible laser power (50% SHG efficiency) to be demonstrated.
authors.affiliation: Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK.
authors.forename: Kang Kang
authors.initials: KK
authors.lastname: Chen
authors.forename: Jonathan H V
authors.initials: JH
authors.lastname: Price
authors.forename: Shaif-Ul
authors.initials: SU
authors.lastname: Alam
authors.forename: John R
authors.initials: JR
authors.lastname: Hayes
authors.forename: Dejiao
authors.initials: D
authors.lastname: Lin
authors.forename: Andrew
authors.initials: A
authors.lastname: Malinowski
authors.forename: David J
authors.initials: DJ
authors.lastname: Richardson