With the remarkable progress in chirped-pulse amplification (CPA) technology and Ti:sapphire laser media, femtosecond lasers with very high peak powers of 1–10 petawatt (PW)[1–6] have been developed around the world and extremely high intensities of 1022–1023 W/cm2[7–9] are now available. Owing to the limitation of the available size and transverse parasitic oscillation in the Ti:sapphire gain media, femtosecond lasers based on optical parametric chirped-pulse amplifiers (OPCPAs) with a peak power of order 100 PW have been designed and are under construction[10,11]. The laser intensity will possibly exceed 1023 W/cm2 in the near future. With the development of ultra-high-intensity femtosecond lasers, the investigations of electron acceleration, ion acceleration, X-/γ-ray generation and astrophysical systems are being actively pursued.
Set citation alerts for the article
Please enter your email address