Compressing µJ-level pulses from 250 fs to sub-10 fs at 38-MHz repetition rate using two gas-filled hollow-core photonic crystal fiber stages.
Opt Lett
; 40(7): 1238-41, 2015 Apr 01.
Article
em En
| MEDLINE
| ID: mdl-25831302
ABSTRACT
Compression of 250-fs, 1-µJ pulses from a KLM YbYAG thin-disk oscillator down to 9.1 fs is demonstrated. A kagomé-PCF with a 36-µm core-diameter is used with a pressure gradient from 0 to 40 bar of krypton. Compression to 22 fs is achieved by 1200 fs2 group-delay-dispersion provided by chirped mirrors. By coupling the output into a second kagomé-PCF with a pressure gradient from 0 to 25 bar of argon, octave spanning spectral broadening via the soliton-effect is observed at 18-W average output power. Self-compression to 9.1 fs is measured, with compressibility to 5 fs predicted. Also observed is strong emission in the visible via dispersive wave generation, amounting to 4% of the total output power.
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MEDLINE
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En
Ano de publicação:
2015
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Article