A Method for Measuring Wavefront Phase Radius of Partially Coherent Gaussian Beams

Abstract

The invention relates to a method of measuring a radius of a partial coherent gauss beam wavefront phase. A partial coherent gauss beam to be measured has a gauss associated characteristic. After the beam to be measured is focused through a thin lens, a spherical surface wavefront phase is generated. An associated apparatus system is adopted to measure the beam to obtain the initial transverse coherent width of the beam, a beam analysis meter is adopted to measure the beam to separately obtain the initial transverse beam waist width of the beam and the transverse beam waist width on an emitting surface, and the radius of the wavefront phase of the beam to be measured is obtained through computing processing. The measured typical partial coherent beam has a wide range of application prospects in fields such as free optical communication, biological medical treatment, nonlinear media and laser inertial confinement nuclear fusion. The method of measuring the radius of the partial coherent gauss beam wavefront phase does not need to use an expensive hartmann wavefront detection sensor and is simple in measurement condition, reliable in result and low in cost.

Description

technical field [0001] The invention relates to a method for measuring the wavefront phase radius of a partially coherent Gaussian beam, which is a method for adjusting the coherence of a linearly polarized laser beam with a ground glass plate, filtering it with a Gaussian amplitude filter, measuring the light field distribution with a beam analyzer, and using a correlation A method of measuring the coherence width of the optical field to obtain the phase radius of the wavefront. Background technique [0002] In recent years, partially coherent beams have been widely used in the fields of inertial confinement nuclear fusion, optical imaging, optical engineering, material heat treatment, nonlinear optics, light scattering, optical communication, remote sensing, lidar, laser scanning, and laser capture. The prospect has aroused great concern. Gaussian Shell mode beam [E. Wolf and E. Collett, “Partially coherent sources which produce same far-field intensity distribution as a ...

AI Technical Summary

Problems solved by technology

[0004] Experimental measurement of the beam waist width and coherence width of partially coherent beams has been reported, but as another important beam parameter wavefront phase radius of partially coherent Gaussian Shell mode beams, its measurement methods and devices have not been reported. One of the more methods is the Hartmann wavefront sensor (SHWS) measurement, but this method relies on complex and expensive measurement equipment, and the measurement cost is high

Images