An intelligent high repetition rate femtosecond pulse real-time full-field measurement method and system

Abstract

The invention discloses an intelligent high repetition frequency femtosecond pulse real-time full-field measurement method and system. The method includes the following steps: 1. dividing the signal to be measured into n channels; 2. each channel is decoded by a high-speed photoelectric amplitude modulator Multiplexing frequency reduction separation; 3. After frequency reduction, each time-domain demultiplexing signal is divided into two signals, one of which is stretched in the time domain through a small dispersion component, and the other signal is passed through a large dispersion The component performs time-frequency conversion; 4. Through the high-speed signal acquisition component, the time-domain intensity information of the signal to be tested after stretching the small dispersion component and the frequency domain envelope information of the test signal after the time-frequency conversion of the large dispersion component are collected in real time; 5. For the collected time-domain strength information of the signal to be tested and the frequency-domain envelope information of the signal to be tested, the Gerchberg-Saxton algorithm is used to iterate continuously to achieve convergence, and the strength and phase of the signal to be tested are obtained in the time domain and frequency domain. information.

Description

technical field [0001] The invention relates to the field of ultrafast signal measurement, in particular to an intelligent high repetition frequency femtosecond pulse real-time full-field measurement method and system. Background technique [0002] Due to its short duration, high peak power, and wide spectrum, ultrafast pulse lasers are widely used in various disciplines, and high repetition rate ultrafast pulses occupy an important stage. How to realize the real-time measurement of high repetition rate ultrafast pulse full-field information has become a major research content of scientific researchers. [0003] Ultra-fast measurement methods have been developed so far and there are many options: autocorrelation measurement method can measure time-domain intensity, but cannot give important information such as the original waveform and phase of the pulse; time-lens time-domain measurement method has high repetition frequency signal pulse overlap problem (IEEE J.Quantum Elec...

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Problems solved by technology

[0005] The problem to be solved by the present invention is to realize the method and system for real-time full-field measurement of intelligent high repetition frequency femtosecond pulses, to break through the limitation that high repetition frequency pulses are prone to pulse overlap, which leads to the unusability of existing measurement technologies, and to realize full-field information measurement

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