High dynamic range multi-channel cross-correlator for single-shot temporal contrast measurement

9th International Conference on Inertial Fusion Sciences and Applications

Kon, A.^1 ; Nishiuchi, M.^1 ; Kiriyama, H.^1 ; Ogura, K.^1 ; Mori, M.^1 ; Sakaki, H.^1 ; Kando, M.^1 ; Kondo, K.^1

Quantum Beam Science Dirct., Japan Atomic Energy Agency, 8-1 Umemi-dai, Kizugawa, Kyoto

619-0215, Japan^1

关键词: Cross correlation techniques;    Cross correlators;    High dynamic range;    Intensity fluctuations;    Optical delay lines;    Peak intensity;    Reference channels;    Temporal contrast;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/717/1/012103/pdf
DOI  :  10.1088/1742-6596/717/1/012103

来源: IOP

【 摘 要 】

We have developed a multi-channel cross-correlator for high dynamic range (>1010), single-shot temporal contrast measurements. The correlator utilizes a third-order crosscorrelation technique and has a reference channel, to be normalized by the measured peak intensity, and four independent optical delay lines. The measurement results of the shot-to-shot temporal contrast clearly show the intensity fluctuations of short pre-pulses at -4.5 ps and -26 ps before main pulse.