Abstract
We present a recent progress of the SG-II 5PW facility, which designed a multi-petawatt ultrashort pulse laser based on optical parametric chirped-pulse amplification (OPCPA). The prior two optical parametric amplifiers have been accomplished and chirped pulses with an energy of 49.7 J and a full-width-at-half-maximum (FWHM) spectrum bandwidth of 85 nm have been achieved. In the PW-scale optical parametric amplification (OPA), with the pump pulse that has an energy of 118 J from the second harmonic generation of the SG-II 7th beam, the pump-to-signal conversion efficiency is up to 41.9%, which to the best of our knowledge is the highest among all of the reported values for OPCPA systems. The compressed pulse is higher than 37 J in 21 fs (1.76 PW), and the focal spot is ${\sim}10~\unicode[STIX]{x03BC}\text{m}$ after the closed-loop corrections by the adaptive optics. Limited by the repetition of the pump laser, the SG-II 5PW facility operates one shot per hour. It has successfully been employed for high energy physics experiments.
Highlights
Owing to the advances in laser technology and related material production over the past decades, many laboratories have started to build extreme light sources for the generation of pulses that have a large energy, narrow width and high peak power[1]
We provide a detailed introduction on the design specifications and current performance of the Shen Guang-II 5PW (SG-II 5PW) laser facility at the National Laboratory on High Power Laser and Physics (NLHLP), Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences (SIOM, CAS)
We presented the current performance of the SG-II 5PW facility fully based on optical parametric chirped-pulse amplification (OPCPA) in the nanosecond domain
Summary
Owing to the advances in laser technology and related material production over the past decades, many laboratories have started to build extreme light sources for the generation of pulses that have a large energy, narrow width and high peak power[1]. Such facilities would provide very strong fields, which are expected to provide breakthroughs in fundamental physics as well as related applications[2]. The 7th beam is used as pump laser for OPA-II of SG-II 5PW. A higher conversion efficiency for the master optical parametric amplifier is still required
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
