摘要
We evaluate and demonstrate ultra-broadband near-infrared noncollinear optical parametric amplification in two nonlinear crystals,bismuth borate(Bi BO)and yttrium calcium oxyborate(YCOB),which are not commonly used for this application.The spectral bandwidth is of the microjoule level;the amplified signal is≥200 nm,capable of supporting sub-10 fs pulses.These results,supported by numerical simulations,show that these crystals have a great potential as nonlinear media in both low-energy,few-cycle systems and high peak power amplifiers for terawatt to petawatt systems based on noncollinear optical parametric chirped pulse amplification(NOPCPA)or a hybrid.
基金
the European Union’s Horizon 2020 research and innovation program under grant agreement No.871124(Laserlab-Europe)
the Euratom research and training program 2014–2018 under grant agreement No.633053
the Fundacao para a Ciencia e a Tecnologia(FCT,Lisboa)under grants Nos.PD/BD/114327/2016,PD/BD/135177/2017,PD/BD/135222/2017 and PINFRA/22124/2016
the framework of the Advanced Program in Plasma Science and Engineering(APPLAu SE,sponsored by FCT under grant No.PD/00505/2012)at Instituto Superior Técnico(IST)。
