Hannover 2010 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 34: Ultrashort Laser Pulses: Applications II
Q 34.4: Vortrag
Mittwoch, 10. März 2010, 14:45–15:00, F 342
Photonic fiber for flexible sub-20 fs pulse delivery — •Jens Bethge1, Tuan Le2, Julia Skibina3, Andreas Stingl2, and Günter Steinmeyer1 — 1Max Born Institute, Berlin, Germany — 2Femtolasers Produktions GmbH, Vienna, Austria — 3Saratov State University, Saratov, Russia
A flexible femtosecond pulse delivery is desirable for many applications, e.g,. microscopy, endoscopy, and photodynamic therapy. We report on the experimental demonstration of sub-20 fs pulse delivery with a spectrally flat phase through 80 cm of chirped photonic crystal fiber (CPCF)[1]. The delivery is utilizing chirped mirrors for dispersion precompensation of the coupling optics as well as the remaining waveguide dispersion of the CPCF. Even tough the use of precompensation has been recently shown for large mode area fibers with a solid core [2], our improved concept of a hollow-core fiber sets a new world record on short pulse delivery and is scalable towards higher energies. Since the dispersion contribution of the fiber is flat and virtually vanishing for all wavelengths involved, we are able to precompensate the dispersion of the optics and of the fiber with only 8 bounces off chirped mirrors. This is an easy-to-implement technique for delivering bandwidth-limited pulses of sub-20 fs duration over meter distances, promising interesting future applications.
[1] J. S. Skibina, et al., Nature Photonics 2, 679 - 683 (2008).
[2] T. Le, et al., Opt. Express 17, 1240-1247 (2009).