Laser pulse characteristic measuring device and method based on fluorescence modulation sampling

Abstract

The invention relates to a laser pulse testing technology, in particular to a laser pulse characteristic measuring device and method based on fluorescence modulation sampling. The technical problems that in existing laser pulse characteristic measurement, the wavelength bandwidth is limited, and different nonlinear crystals are needed for measurement of laser pulses with different wavelengths are solved. According to the device, a laser device generates laser, the laser is divided into transmission light and reference light through a first beam splitting piece, the reference light sequentially passes through a third beam splitting piece and a second reflecting mirror, then enters a concave silver mirror and is focused to a fluorescent crystal to generate fluorescent light, and the fluorescent light is imaged on a camera through a focusing mirror; the transmission light beam is divided into fundamental frequency light and signal light through the second beam splitting piece, the fundamental frequency light passing through the first reflecting mirror and the signal light passing through the delay line are combined through the wedge pair, then enter the concave silver mirror and are focused to the fluorescent crystal to generate fluorescent light, and finally the fluorescent light is imaged on the camera through the focusing mirror. The invention further provides a laser pulse characteristic measuring method based on fluorescence modulation sampling.

Description

technical field [0001] The invention relates to laser pulse testing technology, in particular to a laser pulse characteristic measuring device and method based on fluorescence modulation sampling. Background technique [0002] With the development of laser technology, femtosecond laser has been widely used in biomedicine, ultra-precision processing, information science and other fields. As a more accurate, accurate and faster tool, it provides a new technical means for the above fields to solve Some inherent problems have been solved, and it has become an important direction for interdisciplinary integration. At present, ultrafast femtosecond lasers are very mature, and their wavelengths can cover from ultraviolet to mid-infrared. However, how to perform comprehensive diagnosis of femtosecond laser pulses in different wavelength bands is still a very challenging and important research content. [0003] The pulse characteristics of a laser usually include information such as...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the limitation of the existing laser pulse characteristic measurement by the phase matching mechanism, so that the wavelength bandwidth that the nonlinear crystal can respond to is limited; at the same time, for the measurement of laser pulses of different wavelengths, it is necessary to replace a specially designed nonlinear crystal, To solve the technical problem of increasing the difficulty of operation, a device and method for measuring laser pulse characteristics based on fluorescence modulation sampling are provided

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