Characterization of infrared free electron laser output profile through sum frequency generation spectroscopy

被引：1
作者：
Guo, Wei [1 ]
Song, Qiantong [1 ]
Xue, Jiawei [2 ]
Huangfu, Zhichao [1 ]
He, Yuhan [1 ]
Zhang, Yongyan [1 ]
Liu, Xiaolin [1 ]
Bao, Jun [2 ]
Wang, Zhaohui [1 ]
机构：
[1] Xiamen Univ, Coll Chem & Chem Engn, Dept Chem, State Key Lab Phys Chem Solid Surfaces,MOE Key Lab, Xiamen, Peoples R China
[2] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei, Peoples R China
来源：
SPECTROSCOPY LETTERS | 2023年 / 56卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Cross-correlation; infrared free electron laser; micropulse duration; sum frequency generation; wavelength; VIBRATIONAL SPECTROSCOPY; WATER INTERFACES; DYNAMICS; MONOLAYERS; MOLECULES;
D O I：
10.1080/00387010.2023.2201294
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
Infrared free electron laser is a unique broadband tuning IR light source and useful tool to trace the reaction and vibrational energy transfer dynamics. It is essential for the infrared free electron laser debug and optimization to accurately characterize the wavelength and micropulse profile of the infrared free electron laser output. By synchronizing the infrared free electron laser and tabletop femtosecond laser with high precision, infrared free electron laser-sum frequency generation setup, a sum frequency generation spectroscopy setup using infrared free electron laser pulses, is developed. Through sum frequency generation cross-correlation, the infrared free electron laser output wavelength and micropulse duration are measured from the delaytime-dependent infrared free electron laser-sum frequency generation spectra of a ZnS window. The infrared free electron laser-sum frequency generation measured infrared free electron laser wavelength is linearly correlated with the theoretically calculation with the fixed electron beam energy and variable undulator magnetic gaps. And the measured micropulse duration is 2.0 ps@5.25 mu m and 2.9 ps@8.35 mu m. These results demonstrate the excellent ability of sum frequency generation in the diagnostic and characterization of infrared free electron laser output profile, and the quality of the infrared free electron laser pulse structure.
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收藏
页码：218 / 226
页数：9
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