激光远场强度测量

2020 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM) Pub Date : 2020-08-26 DOI:10.1109/iWEM49354.2020.9237407

Kuo-Shin Huang, Kai-Wei Chang, Ko-Fan Tsai, T. Liu, Ching-Huang Lin

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引用次数: 0

摘要

光束尺寸、发散角和光束质量的测量依赖于对强度分布的准确评估。本文采用图像投影法得到激光的光强分布。采用不同发散角的激光器(VCSEL, 24度/He-Ne激光器，0.057度)作为大发散角和小发散角的两种不同情况。这些斑点投射在不同的旋转扩散膜上。在VCSEL的情况下，我们发现当采用ISO 11146-1:2005时，胶片的选择对于获得正确的值至关重要。

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Far Field Intensity Measurement for Lasers

The measurements of be am size, divergence angle and beam quality depend on accurate assessment of intensity distribution. In this paper, we utilize image projection method to get intensity distribution of lasers. Lasers with different divergence angles (VCSEL, 24degrees/He-Ne laser, 0.057degrees) are used to be two different cases with respect to large and small divergence angles. The spots are projected on different rotating diffuser films. In the case of VCSEL, we found that the film selection is critical in acquiring correct values when ISO 11146-1:2005 is adopted.

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2020 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)

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