Using nonlinear ellipse rotation in a gas-filled hollow waveguide, we have increased the pulse contrast of a microjoule femtosecond laser pulse by several orders of magnitude. This scheme offers a number of advantages over competing techniques, including a high degree of tunability that allows for a broad range of input pulse parameters, higher throughput, greater stability, and an output pulse with high spatial quality that is compressible to a quarter of the original temporal width.
© 2002 Optical Society of America
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(320.2250) Ultrafast optics : Femtosecond phenomena
(320.5520) Ultrafast optics : Pulse compression
(320.5540) Ultrafast optics : Pulse shaping
D. Homoelle, Alexander L. Gaeta, V. Yanovsky, and G. Mourou, "Pulse contrast enhancement of high-energy pulses by use of a gas-filled hollow waveguide," Opt. Lett. 27, 1646-1648 (2002)