| http://www.w3.org/ns/prov#value | - Generally, beam quality is an assessment of how tightly a laser beam can be focused, and a diffraction-limited Gaussian beam achieves the best possible BQ. Various metrics are used to express beam quality, such as the beam parameter product (BPP), which is the product of the beam radius at the beam waist with the far-field beam divergence, the M2 factor, which is the ratio of the beam's (second mo
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