Generation of dual-wavelength, synchronized, tunable, high energy, femtosecond laser pulses with nearly perfect gaussian spatial profile

摘要: Abstract We use self-phase modulation in a single-mode fiber to produce broadband femtosecond laser pulses. Subsequent amplification through two Bethune cells yields high-energy, tunable, pulses synchronized with the output of an amplified colliding-pulse-modelocked (CPM) laser. routinely obtain tunable 200 μJ 42 fs (fwhm) duration nearly perfect gaussian spatial profile. Although is widely used systems, fiber-generated supercontinuum cell amplifier new feature which maintains high-quality profile while providing high gain. This system particularly well suited for energy dual-wavelength pump=probe experiments and time-resolved four-wave mixing spectroscopy.