title: Single-clad Tm-Ho:fiber amplifier for high-power sub-100-fs pulses around 1.9 μm.
abstract: A Tm-Ho:fiber amplifier based on single-clad geometry is demonstrated for the generation of high-power femtosecond pulses around 1.9 μm. The amplifier is seeded by the low-power Raman soliton generated by an Er:fiber femtosecond laser. Pulse trains at a repetition rate of 250 MHz tunable from 1.84 to 1.92 μm with corresponding powers from 2.6 to 3 W and durations from 80 to 105 fs have been obtained. Beating with a single-frequency Tm laser has shown that the pulse coherence is highly preserved. The overall power fluctuations have been measured to be as low as 0.6%.
authors.affiliation: Dipartimento di Fisica-Politecnico di Milano and Istituto di Fotonica e Nanotecnologie-CNR, Milano, Italy. nicola.coluccelli@polimi.it
authors.forename: Nicola
authors.initials: N
authors.lastname: Coluccelli
authors.forename: Marco
authors.initials: M
authors.lastname: Cassinerio
authors.forename: Paolo
authors.initials: P
authors.lastname: Laporta
authors.forename: Gianluca
authors.initials: G
authors.lastname: Galzerano