Tang Qi-Jie, Yang Dong-Xu, Wang Jian, Feng Yi, Zhang Hong-Fei, Chen Teng-Yun
State Key Laboratory of Technologies of Particle Detection and Electronics, Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
Synergetic Innovation Center of Quantum Information and Quantum Physics, Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China.
Rev Sci Instrum. 2016 Nov;87(11):114708. doi: 10.1063/1.4968028.
Real-time energy measurement using pulse integration method for high repetition rate ultrashort laser pulses based on FPGA (Field-Programmable Gate Array) and high-speed pipeline ADC (Analog-to-Digital Convertor) is introduced in this paper. There are two parts contained in this method: pulse integration and real-time data processing. The pulse integration circuit will convert the pulse to the step type signals which are linear to the laser pulse energy. Through the real-time data processing part, the amplitude of the step signals will be obtained by ADC sampling and conducting calculation in real time in FPGA. The test result shows that the method with good linearity (4.770%) and without pulse measurement missing is suitable for ultrashort laser pulses with high repetition rate up to 100 MHz.
本文介绍了一种基于现场可编程门阵列（FPGA）和高速流水线模数转换器（ADC），采用脉冲积分法对高重复率超短激光脉冲进行实时能量测量的方法。该方法包含两个部分：脉冲积分和实时数据处理。脉冲积分电路将脉冲转换为与激光脉冲能量呈线性关系的阶跃型信号。通过实时数据处理部分，利用ADC采样并在FPGA中实时进行计算，从而获得阶跃信号的幅度。测试结果表明，该方法线性度良好（4.770%）且无脉冲测量遗漏，适用于高达100MHz的高重复率超短激光脉冲。
