Designer femtosecond pulse shaping using grating-engineered quasi-phase-matching in lithium niobate.
The generation of tailored femtosecond pulses with fully engineered intensity and phase profiles is demonstrated using second-harmonic generation of an Er:fiber laser in an aperiodically poled lithium niobate crystal in the undepleted pump regime. Second-harmonic pulse shapes, including Gaussian, stepped, square, and multiple pulses have been characterized using cross-correlation frequency-resolved optical gating and have been shown to agree well with theory.
Kornaszewski
Ukasz
U
Ultrafast Optics Group, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK. lwk1@hw.ac.uk
Kohler
Markus
M
Sapaev
Usman K
UK
Reid
Derryck T
DT