title: Efficient spectral shift and compression of femtosecond pulses by parametric amplification of chirped light.
abstract: We present a method for an efficient spectral shift and compression of pulses from a femtosecond laser system. The method enables generation of broadly tunable (615-985 nm) narrow bandwidth (≈10 cm(-1)) pulses from the femtosecond pulses at 1030 nm. It employs a direct parametric amplification--without spectral filtering--of highly chirped white light by a narrow bandwidth (<5 cm(-1)) 515 nm pump pulse. The system, when pumped with just 200 μJ of the fundamental femtosecond pulse energy, generates pulses with energies of 3-9 μJ and an excellent beam quality in the entire tuning range.
authors.affiliation: Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, PL-01-224, Warsaw, Poland. nejbauer@ichf.edu.pl
authors.forename: Michał
authors.initials: M
authors.lastname: Nejbauer
authors.forename: Czesław
authors.initials: C
authors.lastname: Radzewicz
mesh_terms: D000669:Amplifiers, Electronic; D044962:Data Compression / Q000379:methods*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007834:Lasers; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*