Method for measuring high energy laser energy parameter based on light pressure principle and apparatus thereof
A high-energy laser and principle technology, applied in the field of high-energy laser parameter measurement, can solve problems such as difficult continuous wave high-energy laser parameter measurement, achieve wide applicability, and improve the effect of cost-effectiveness
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[0048] The present invention proposes a high-energy laser energy parameter measurement method based on measuring dynamic light pressure. The high-energy laser is incident on a mirror 5 with a deformable rod 6, and the multi-point dynamics of the mirror 5 under the laser light pressure are accurately measured. Displacement, calculated parameters such as laser energy.
[0049] According to the classical electromagnetic field equation, it can be calculated that when light is incident on a total reflection surface, the light pressure F and the light power I borne by the reflection surface can be expressed as
[0050] F=2·I·cosθ / c (1)
[0051] Among them: c is the speed of light; θ is the angle between the light incident direction and the normal of the reflecting surface. For a 200kW high-energy laser, the pressure caused by the vertical incidence to the specular reflection is about 136mg force. Estimated at 100 times the dynamic range of the measurement system, the minimum resolution of...
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