Real-time energy measurement of high repetition rate ultrashort laser pulses using pulse integration and FPGA processing

Qi-Jie Tang; Dong-Xu Yang; Jian Wang; Yi Feng; Hong-Fei Zhang; Teng-Yun Chen

doi:10.1063/1.4968028

Real-time energy measurement of high repetition rate ultrashort laser pulses using pulse integration and FPGA processing

Rev Sci Instrum. 2016 Nov;87(11):114708. doi: 10.1063/1.4968028.

Authors

Qi-Jie Tang¹, Dong-Xu Yang¹, Jian Wang¹, Yi Feng¹, Hong-Fei Zhang¹, Teng-Yun Chen²

Affiliations

¹ 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.
² 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.

PMID: 27910641
DOI: 10.1063/1.4968028

Abstract

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.