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.
Centre for Photonics and Photonic Materials, Department of Physics, Claverton Down, Bath, BA2 7AY, United Kingdom. f.gerome@bath.ac.uk
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F
Gèrôme
P
P
Dupriez
J
J
Clowes
J C
JC
Knight
W J
WJ
Wadsworth