Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

Q: Fachverband Quantenoptik und Photonik

Q 58: Poster: Quantum Optics and Photonics IV

Q 58.50: Poster

Donnerstag, 3. März 2016, 16:30–19:00, Empore Lichthof

Femtosecond pulse shaping of Laguerre-Gaussian laser pulses — •Tom Bolze and Patrick Nuernberger — Physikalische Chemie II, Ruhr-Universität Bochum, Universitätsstraße 150, 44801 Bochum

The temporal shaping of femtosecond laser pulses is widely used and well explored. A number of schemes have been demonstrated to achieve fast, stable and precise shaping of incident laser pulses. However the Hermite-Gaussian HG₀₀ mode is almost exclusively used.
We present our results for shaping femtosecond Laguerre-Gaussian (LG) laser pulses with a pulse shaper. We employ a 128-pixel LCD in the common 4f geometry of a pulse shaper, a spiral phase plate (SPP) is used to transform the HG₀₀ mode into the LG₀₁ mode. Upon changing the spectral phase of the pulse we investigate the variations in the temporal shape of the pulse using a FROG-device and the spatial shape using a CCD-camera. The Orbital Angular Momentum (OAM) of the shaped pulse is determined in dependence on the applied spectral phase, hence we investigate whether complex spectral phases distort the spatial beam profile of femtosecond LG beams.