title: Tunable filters for precise spectral gain control in ultra-short-pulse laser systems.
abstract: We present tunable spectral filters (TSFs) as a variable and precisely adjustable method to control the spectral gain of short-pulse laser systems. The TSFs provide a small residual spectral phase and a high damage threshold, and generate no pre- or post-pulses. The method is demonstrated for two different laser materials and can be applied as an intracavity compensation in regenerative amplifiers as well as a method for pre-compensation in high-energy multipass amplifiers. With this method, a full width at half-maximum bandwidth of 23.9 nm could be demonstrated in a diode-pumped, 50 J Yb:CaF2amplifier.
authors.forename: Sebastian
authors.initials: S
authors.lastname: Keppler
authors.forename: Marco
authors.initials: M
authors.lastname: Hornung
authors.forename: Peter
authors.initials: P
authors.lastname: Zimmermann
authors.forename: Hartmut
authors.initials: H
authors.lastname: Liebetrau
authors.forename: Marco
authors.initials: M
authors.lastname: Hellwing
authors.forename: Joachim
authors.initials: J
authors.lastname: Hein
authors.forename: Malte C
authors.initials: MC
authors.lastname: Kaluza