Collection Of theses on high power laser and plasma physics, 2012, 10 (1): 3989, Published Online: Jun. 2, 2017
Accuracy of single-shot autocorrelation measurements of petawatt laser pulses
Abstract
At the Shen Guang II (SGII) Petawatt Laser Facility, measurements of large-energy, single-shot laser pulses sometimes feature asymmetric autocorrelation signals, causing uncertainty in the measurement of compressed pulses. This study presents a method for defining and describing the asymmetry of autocorrelation signals. We discuss two sources of asymmetry: the nonuniform distribution of the near field excited by a beam, and the rotation of autocorrelator arms from the cylinder lens. The pulsewidth of an asymmetric autocorrelation signal is shorter than its real width. After updating the autocorrelator, the single-shot autocorrelator for the SGII petawatt laser exhibits a measurement uncertainty of below 12.3%. Recommendations on reducing asymmetry in large-energy, single-shot autocorrelation are discussed.
Xiaoping Ouyang, Jingui Ma, Lin Yang, Shunxing Tang, Chong Liu, Yonghua Peng, Liejia Qian, Baoqiang Zhu, Jianqiang Zhu, Zunqi Lin. Accuracy of single-shot autocorrelation measurements of petawatt laser pulses[J]. Collection Of theses on high power laser and plasma physics, 2012, 10(1): 3989.
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