Hamburg 2009 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 14: Ultrakurze Pulse: Erzeugung II
Q 14.4: Vortrag
Montag, 2. März 2009, 17:15–17:30, VMP 8 R206
A chirped photonic crystal fiber for high-fidelity guiding of sub-100 fs pluses — •J. Bethge1, M. Bock1, D. Fischer1, J. S. Skibina2, V. I. Beloglasov2, S. Burger3, R. Iliew4, and G. Steinmeyer1 — 1Max Born Institute, Berlin — 2Saratov State University, Saratov (Russia) — 3Konrad Zuse Institute, Berlin — 4Friedrich-Schiller-Universität, Jena
Photonic crystal fibers usually confine
the light by means of a periodic cladding, consisting of several
layers of identical cells [1]. This design resonantly decreases the
transmission losses of such fibers to values of a few dB/km
in a narrow wavelength range. However, the rather
narrowband transmission bands and the detrimental third order
dispersion characteristics of this single-cell design
generally render application of such hollow-core fibers difficult
in the femtosecond range. Therefore, no fiber-based concept
can currently provide guiding of sub-100 fs pulses over
extended distances. By introducing a radial chirp into the
photonic crystal [2] we here demonstrate a novel concept for
photonic crystal fibers that breaks with the paradigm of lattice
homogeneity and enables a new degree of freedom in
photonic crystal fiber design, eliminating much of the pulse
duration restriction of earlier approaches. We demonstrate that the small
GVD of chirped photonic crystal fibers allows for surprisingly weak stretching
of 13 fs pulses, which only double their duration within 1 m of guided propagation.
P. Russell, Science 299, 358-362 (2003)
J. Skibina, Nature Phot. 2, 679-683 (2008)