Multi Petawatt Laser Design for the SHENGUANG Ⅱ Laser Facility

摘要

By using the SG-Ⅱ laser and the ninth-beam as the pump source, the Shenguang-Ⅱ multi petawatt laser system with three OPCPA stages is designed. Based on the largest size of the commercial gratings provided now by the JY Company, chirped pulses with 260J energy will be delivered after the third stage of OPCPA. When compressed by a four pass compressor, a laser pulse of 150J 30fs (5PW) will be obtained. This laser system is under construction and is expected to be finished in the late of 2015. The paper presents the details of its design and the progress has achieved.