title: High-power widely tunable sub-20 fs Gaussian laser pulses for ultrafast nonlinear spectroscopy.
abstract: We demonstrate the generation of widely tunable sub-20 fs Gaussian-shaped laser pulses using a grating-based 4-f pulse shaper and a liquid crystal spatial light modulator. Our pump source is an Yb:KGW solitary mode-locked oscillator at 44 MHz repetition rate which is coupled into a large mode area microstructured fiber to generate a broad spectrum from below 900 nm to above 1150 nm. These pulses are precompressed by a prism sequence and subsequently sent into the pulse shaper. We use the multiphoton intrapulse interference phase scan (MIIPS) for phase shaping and iterative amplitude optimization to achieve Gaussian-like tunable sub-20 fs pulses with output powers of up to 142 mW as well as nontunable pulses with 310 mW output power as short as 11.5 fs.
authors: 4th Physics Institute and Research Center SCoPE, University of Stuttgart, Germany. b.metzger@physik.uni-stuttgart.de
authors: Bernd
authors: B
authors: Metzger
authors: Andy
authors: A
authors: Steinmann
authors: Harald
authors: H
authors: Giessen
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D053844:Lasers, Solid-State; D008027:Light; D017711:Nonlinear Dynamics; D016011:Normal Distribution; D012542:Scattering, Radiation; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D013057:Spectrum Analysis / Q000295:instrumentation*