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

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-timedata 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-timedata 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.

Source: Review of Scientific Instruments - November 29, 2016 Category: Physics Authors: Qi-jie Tang, Dong-xu Yang, Jian Wang, Yi Feng, Hong-fei Zhang and Teng-yun Chen Source Type: research