Pulse laser beam quality synchronous measuring system and synchronous control method thereof

Abstract

The invention discloses a pulse laser beam quality synchronous measuring system which comprises a facula test light path and a clock synchronous control module. The facula test light path comprises a straight line guide rail, two beam splitters, a reflector, a focus lens, a laser attenuator and two CCDs. Incident laser is divided into two beams by the first beam splitter, one beam enters a quick response photoelectric detector, and time domain information of the beam is measured; the other beam enters the test light path. Appropriate attenuation is carried out on the incident laser by the attenuator, beam waist regeneration is achieved through the focus lens, and the light beam is divided by the other beam splitter into two beams perpendicular to each other and emits into the two CCDs for facula measurement. One of the CCDs measures the size of a facula at a fixed position, and the other CCD determines the position of a beam waist through movement of the guide rail and measures the size of the beam waist. By means of measurement of the three values, a gauss beam analysis formula after beam waist regeneration can be obtained. A beam quality parameter of the incident gauss beam is obtained through lens transformation.

Description

technical field [0001] The invention belongs to the field of pulse laser beam quality testing, and more specifically relates to a pulse laser beam quality synchronous measurement system and method. Background technique [0002] With the increasing application of laser technology in the fields of industry and scientific research, the importance of laser beam quality testing technology has become increasingly prominent, and the demand for laser beam quality testing equipment has also increased. More and more scientific research institutions and manufacturers at home and abroad have also launched research and development of laser beam quality testing systems. At present, there are many commercial laser beam quality measuring instruments with mature technology on the market. These beam quality measuring instruments mainly realize the accurate measurement of beam quality indicators such as macroscopic beam waist width, M2 and far-field divergence angle of continuous or pulsed las...

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Problems solved by technology

[0004] Aiming at the defects of the prior art, the object of the present invention is to provide a pulsed laser beam quality synchronous measurement system and method, aiming at solving the problem that the prior art cannot realize the measurement of the beam quality index of a single pulse of the pulsed laser, and cannot detect the pulsed laser beam quality. The problem of the stability of the beam quality

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