Laser parameter integrated test system

Abstract

The invention relates to a laser parameter integrated test system, comprising a wedge spectroscope, a concave spherical reflector, a digital plane array charge coupled device (CCD) camera, a silicon photoelectric diode, a photoelectric detector, an energy probe, a spectrometer, an adjustable attenuator, a stepping motor and a computer with an acquisition card and a control card. A laser to be tested is incident upon the plane reflector; the monopulse energy, the pulse width, the repetition frequency and the wavelength of the laser beam are measured by means of the transmission light of the plane reflector; the wedge spectroscope splits the reflection light of the plane reflector into two beams, wherein one beam of laser is used for observing a near field laser spot, and the other beam of laser is used for measuring the M2 factor, the far field divergent angle, the beam waist diameter and the pointing stability of the laser beam. The laser parameter integrated test system can carry out integrating, precise and stable measurements on the monopulse energy, the wavelength, the pulse width, the repetition frequency, the M2 factor and the pointing stability of the laser beam.

Description

technical field [0001] The invention relates to the measurement of laser parameters, in particular to a comprehensive test system for laser parameters, which can measure laser single pulse energy, wavelength, pulse width, repetition frequency, M 2 Factor, far-field divergence angle, beam waist diameter and pointing stability are tested. Background technique [0002] To test the performance of the laser beam, the conventional practice is to use different test optical paths and measurement devices for different laser parameters: [0003] (1) The measurement of pulsed laser single pulse energy (or continuous laser power) uses a conventional pyroelectric energy (or power) meter. The pyroelectric detector has a wide spectral range and a high detection rate. It is suitable for Measurement of single pulse energy (or continuous laser power) of pulsed laser at room temperature; [0004] (2) The laser wavelength is measured by a common grating spectroscopic method, and the grating t...

AI Technical Summary

Problems solved by technology

The peak power density difference and optical path difference of each spot obtained by this method are related to the distance between two parallel plates and the sum of the incident angles of the laser beam entering the plate. It is necessary to ensure that M 2 The accuracy of factor calculation requires accurate adjustment of the distance between two parallel plates and the incident angle of the laser beam entering the plate, which increases the complexity of the method.

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