Sub-3-cycle vortex pulses of tunable topological charge

Abstract

Novel types of reflective spiral micro-electro-mechanical systems were used to generate few-cycle vortex pulses of variable topological charge from a Ti:sapphire laser oscillator. The phase profile of these components was controlled by varying the temperature. The temporal properties of the pulses were characterized with spatially resolved nonlinear autocorrelation. The beam structure resembles a slightly distorted Laguerre–Gaussian distribution. The different topological charges were indicated by detecting Poynting-vector maps with a programmable Shack–Hartmann sensor of enhanced angular sensitivity.

© 2013 Optical Society of America

Few-cycle high-contrast vortex pulses

Martin Bock, Jürgen Jahns, and Ruediger Grunwald
Opt. Lett. 37(18) 3804-3806 (2012)

Effects of orbital angular momentum on few-cycle and sub-cycle pulse shapes: coupling between the temporal and angular momentum degrees of freedom

Miguel A. Porras
Opt. Lett. 44(10) 2538-2541 (2019)

Spectral anomalies and Gouy rotation around the singularity of ultrashort vortex pulses

M. Liebmann, A. Treffer, M. Bock, T. Elsaesser, and R. Grunwald
Opt. Express 25(21) 26076-26088 (2017)

Three-dimensional Dammann vortex array with tunable topological charge

Junjie Yu, Changhe Zhou, Wei Jia, Anduo Hu, Wugang Cao, Jun Wu, and Shaoqing Wang
Appl. Opt. 51(13) 2485-2490 (2012)

Supercontinuum optical vortex pulse generation without spatial or topological-charge dispersion

Yu Tokizane, Kazuhiko Oka, and Ryuji Morita
Opt. Express 17(17) 14517-14525 (2009)