title: Sagnac interferometric multipass loop amplifier.
abstract: We propose and investigate experimentally an interferometrically stable, polarization-selective pulse multiplexing scheme for direct laser amplification of picosecond pulses. The basic building block of this scheme is a Sagnac loop which allows for a straightforward scaling of the pulse-multiplexing scheme. Switching the amplifier from single-pulse amplification to burst mode increases extraction efficiency, reduces parasitic non-linearities in the gain medium and allows for higher output energies. Time-frequency analysis of the amplified output pulses demonstrates the viability of this approach.
authors.affiliation: Photonics Institute, Vienna University of Technology, Gusshausstrasse 27-387, A-1040 Vienna, Austria.
authors.forename: S
authors.initials: S
authors.lastname: Roither
authors.forename: A J
authors.initials: AJ
authors.lastname: Verhoef
authors.forename: O D
authors.initials: OD
authors.lastname: Mücke
authors.forename: G A
authors.initials: GA
authors.lastname: Reider
authors.forename: A
authors.initials: A
authors.lastname: Pugžlys
authors.forename: A
authors.initials: A
authors.lastname: Baltuška