Acta Optica Sinica, Volume. 16, Issue 1, 117(1996)
A Noval Method for Measuring the Variance of Laser Beams
By measuring the power of a laser beam fefore and after a cylindrical lens made of absorbing filter, the spatial variance along the given transverse direction at the waist of the laser beam can be obtained. We can also obtain M2 and spatial variance at other axial positions with the help of additive lenses. Design criterion and measurement error of the method are discussed.
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[in Chinese], [in Chinese], [in Chinese], [in Chinese]. A Noval Method for Measuring the Variance of Laser Beams[J]. Acta Optica Sinica, 1996, 16(1): 117