Table 4.

Laser beam diameters measured 5 mm from the probe tip.

$1/{\mathrm{e}}^2$ Width	405 nm	444 nm	532 nm	635 nm
X (μm)	79.6	78.6	81.2	87.4
Y (μm)	78.4	77.4	80.1	86.4
Mean (μm)	79	78	80.7	86.9