A novel concept for octave spanning dispersive mirrors with low spectral dispersion oscillations is presented. The key element of the so-called wedge dispersive mirror is a slightly wedged layer which is coated on a specially optimized dispersive multilayer stack by a common sputter coating process. The group delay dispersion (GDD) of a pulse reflected on a wedge dispersive mirror is nearly free of oscillations. Fabricated mirrors with negative GDD demonstrate the compression of a pulse down to 3.8 fs as good as double angled mirrors optimized for the same bandwidth.
Fields of Expertise
- Advanced Materials Science
Habel, F., Shirvanyan, V., Trubetskov, M., Burger, C., Sommer, A., Kling, M. F., ... Pervak, V. (2016). Octave spanning wedge dispersive mirrors with low dispersion oscillations. Optics Express, 24(9), 9218-9223. https://doi.org/10.1364/OE.24.009218