|
Publications
|
|
||
| |
||
|
||
| ||
|
|
"Tunable sub-10-fs ultraviolet pulses generated by achromatic frequency doubling" Peter Baum, Stefan Lochbrunner, and Eberhard RiedleOpt. Lett. 29, 1686 - 1688 (2004) Abstract: Tunable UV pulses shorter than 10 fs are generated by achromatic frequency doubling of a noncollinear optical parametric amplifier. With a suitable two-prism sequence we achieve first- and second-order achromatic phase matching and increase the natural bandwidth of the nonlinear crystal by a factor of 80. Extremely broad UV spectra with a Fourier limit of 2.9 fs are generated in a 360-mm-thick beta-barium borate crystal at a conversion efficiency of 20%. We compensate for the angular dispersion and the first-order chirp of the highly stable UV pulses with a second prism sequence and fully characterize the temporal pulse shape with zero-additional-phase spectral phase interferometry for direct electric-field reconstruction (ZAP-SPIDER). Pulses as short as 7 fs are generated by controlling the higher-order chirp with a deformable mirror. BMO authors (in alphabetic order): Peter Baum Stefan Lochbrunner Eberhard Riedle Order Hardcopy |