Compression of Femtosecond Solitons in 8m of Tapered Hollow-Core Photonic Bandgap Fiber

We report adiabatic soliton pulse compression in a tapered hollow-core photonic bandgap fiber. We compress 195 fs input pulses at 800 nm wavelength to less than 100 fs after propagation through 8 m of fiber, at 50 nJ pulse energies.