Regensburg 2010 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 5: Ultra-fast Phenomena

HL 5.4: Talk

Monday, March 22, 2010, 11:00–11:15, H17

high-power soliton-induced supercontinuum generation and tunable sub-10-fs VUV pulses from kagome-lattice HC-PCFs — •song-jin im, anton husakou, and joachim herrmann — Max-Born-Institute for Nonlinear Optics and Short Pulse Spectroscopy, Max-Born-Str. 2a, D-12489 Berlin, Germany

We propose and theoretically study a novel approach for high-power optical supercontinuum generation in argon-filled kagome lattice hollow core-photonic crystal fibers (HC-PCFs). Argon-filled hollow waveguides with a kagome-lattice cladding are especially interesting for high-power spectral broadening because of anomalous dispersions in the visible and ultraviolet, large core diameters, and high ionization threshold of argon. We predict the generation of high-coherence two-octave broad spectra, with spectral peak power densities of MW/nm up to five orders of magnitude higher than in solid-core PCFs, and with high average coherence of 0.9999. The underlying mechanism differs in an important aspect from that in solid-core PCFs where the supercontinuum arises by the emission of several fundamental solitons; in contrast, in the case of a kagome lattice HC-PCF it arises from a single high-order soliton. A second predicted phenomenon is that the output radiation contains a sub-10-fs vacuum-ultraviolet pulse which carries about 20% of input energy corresponding to few tens of µJ. The spectrum of this pulse is a narrow-band VUV peak which can be tuned by pressure from 400 nm to 120 nm. These high-energy VUV pulses can be identified as the non-solitonic radiation from a high-order soliton at the stage of maximum compression.