Single-generation ultra-short laser pulse width measurement device and measurement method

Abstract

The invention discloses a single-generation ultra-short laser pulse width measurement device and a single-generation ultra-short laser pulse width measurement method. The single-generation ultra-shortlaser pulse width measurement device comprises a beam splitter, a CCD, a first optical path, a second optical path, a kerr effect module and an imaging module. Based on the single-generation ultra-short laser pulse width measurement device and the single-generation ultra-short laser pulse width measurement method, the pulse width of the ultra-short laser pulse can be measured through the opticalkerr effect based on the inclination of wavefront. Only through changing an included angle formed between the pumping light and the detection light emitted from the first optical path and the second optical path, the measurement resolution and the time window can be adjusted. Therefore, the device and the method are wide in application range. Not only the width of the ultra-short pulse laser can be measured, but also the pulse width ranging from the visible spectrum to the near-infrared spectrum can be measured. The advantages of high time resolution, tunable property, wide application range and the like are realized.

Description

technical field [0001] The invention belongs to the technical field of ultrashort pulse measurement, and in particular relates to a single-shot ultrashort laser pulse width measurement device and a measurement method. Background technique [0002] Currently, there are various methods for measuring laser pulse width. However, the fastest response time of existing optoelectronic devices is on the order of ps. Therefore, these optoelectronic devices cannot be directly used to measure the pulse width of femtosecond lasers. At present, femtosecond laser pulse width can only be measured by femtosecond laser itself. There are three commonly used methods: autocorrelation method, frequency-resolved optical shutter (FROG) and self-referencing spectral phase coherent electric field reconstruction method (SPIDER). Among them, the correlation method can be used to measure the pulse width, but the correlation signal cannot give the pulse waveform, and the pulse waveform needs to be assum...

AI Technical Summary

Problems solved by technology

Among them, the correlation method can be used to measure the pulse width, but the correlation signal cannot give the pulse waveform, and the pulse waveform needs to be assumed in advance, so the correlation method can give the chirp of the pulse, but it cannot provide the phase information of the pulse

The frequency-resolved optical shutter and the self-reference spectral phase coherent electric field reconstruction method can not only give the phase information of the pulse spectrum, but also measure the pulse time-domain waveform, but these two methods are much more complicated than the correlation method, and the implementation is difficult.

[0003] Moreover, the above three methods can only measure repeated ultrashort laser pulses, and cannot measure the width of a single ultrashort laser pulse

Images