Abstract
Photonic-crystal fibers are employed to demonstrate widely tunable frequency down-conversion of unamplified Ti:sapphire laser pulses through the soliton self-frequency shift induced by the Raman effect. Wavelength shifts as large as are achieved for input few-cycle pulses with broadband spectra centered at approximately . The central wavelength of the redshifted output of a photonic-crystal fiber is smoothly tuned from the low-frequency edge in the spectrum of the Ti:sapphire laser pulse up to by varying the input energy in the fundamental mode of the fiber.
5 More- Received 7 October 2005
DOI:https://doi.org/10.1103/PhysRevE.74.036617
©2006 American Physical Society