Meizhi Sun, Jun Kang, Xiao Liang, Haidong Zhu, Qingwei Yang, Qi Gao, Ailin Guo, Ping Zhu, Panzheng Zhang, Linjun Li, Lijuan Qiu, Zhantao Lu, Sheng Wang, Xiaoniu Tu, Xinglong Xie, Jianqiang Zhu. Demonstration of a petawatt-scale optical parametric chirped pulse amplifier based on yttrium calcium oxyborate[J]. High Power Laser Science and Engineering, 2023, 11(1): 010000e2
- High Power Laser Science and Engineering
- Vol. 11, Issue 1, 010000e2 (2023)
Fig. 1. Schematic of the experiment. SHG, second harmonic generation; AO, adaptive optics; OAP, off-axis parabolic mirror.
Fig. 2. Normalized waveforms of the incidence signal (blue), amplified signal (red) and incidence pump (green) for OPCPA-II.
Fig. 3. Normalized spectra of the incidence (blue) and amplified (red) signal, compared with the theoretical gain of YCOB-based OPCPA-II (green).
Fig. 4. The reflection (a) and transmission (b) properties of YCOB crystal measured by a ZYGO interferometer.
Fig. 5. (a) Amplified signal energy achieved by numerical simulation (red solid line) and measured in the experiment (red circles); (b) conversion efficiency obtained by numerical simulation (blue solid line) and experimental measurement (blue circles).
Fig. 6. OPCPA conversion efficiency versus the deviation from the optimal phase-matching angle, when the non-collinear angle was set at 2.74°.
Fig. 7. Near fields of the amplified signal in OPCPA-II based on YCOB (a) and LBO (b) crystals.
Fig. 8. The dynamic wavefront aberrations measured by a Hartmann sensor in the adaptive optics assembly for OPCPA–II with YCOB crystal (a) and LBO crystal (b).
Fig. 9. The autocorrelation (AC) trace of a signal pulse after the master compressor.
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