%0 Journal Article
%A Demirbas, Uemit
%A Rentschler, Christian
%A Zhang, Zhelin
%A Pergament, Mikhail
%A Matlis, Nicholas
%A Kärtner, Franz
%T Advantages of pulse-train excitation in narrow-band terahertz generation: mitigation of undesired nonlinear effects
%J Optical materials express
%V 14
%N 11
%@ 2159-3930
%C Washington, DC
%I Optica
%M PUBDB-2024-06288
%P 2644
%D 2024
%X In this work, we have studied the limitations of narrowband multi-cycle (MC)terahertz (THz) generation via optical rectification (OR) in periodically-poled lithium niobate(PPLN) crystals. Detailed investigation of the transmitted beam profile, THz conversionefficiency (CE), and parasitic second-harmonic generation (SHG) strength as a function ofincident pump beam size showed that Kerr-lensing is a significant bottleneck in the efficiencyscaling of MC THz generation. We have also demonstrated that compared to the usage of asingle pump pulse, excitation of the PPLN crystal via a pulse train, not only boosts up THzCE and narrows down the bandwidth of the achieved THz beam but also helps to mitigate theeffect of undesired nonlinearities, such as Kerr-lensing, and parasitic SHG.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:001346226600007
%R 10.1364/OME.541275
%U https://bib-pubdb1.desy.de/record/615827