High power tunable femtosecond soliton source using hollow-core photonic bandgap fiber, and its use for frequency doubling.
We report a high power tunable femtosecond soliton-based source using a simple combination of fiber-amplified pulses at 1064 nm and hollow-core photonic bandgap fiber. Compression of 5.5 ps input pulses, strongly chirped by self phase modulation in the amplifier, results in stable 520 fs-soliton formation with 77% conversion efficiency after only 8m propagation in the hollow-core fiber. The Raman self-frequency shift of the solitons was used to provide 33 nm wavelength tuneability. The transform-limited output pulses were frequency doubled using a nonlinear crystal with high conversion efficiency of 60% to demonstrate a femtosecond green laser tunable from 534 nm to 548 nm with 180 nJ pulse energy.
Gèrôme
F
F
Centre for Photonics and Photonic Materials, Department of Physics, Claverton Down, Bath, BA2 7AY, United Kingdom. f.gerome@bath.ac.uk
Dupriez
P
P
Clowes
J
J
Knight
J C
JC
Wadsworth
W J
WJ