Table 2.

Adjusted radii (r), equivalent square side lengths (l_sq), and mean laser beam energies per 1 mm² of cut area (E_p) for four tree species and four laser settings.

Trial	Parameter	Birch	Poplar	Oak	Pine
P1	Adjusted radius r (mm)	8.8	10.5	10.9	9.6
N = 1000 W	Square side length lsq (mm)	15.6	18.5	19.2	17.1
vp = 1000 mm·min−1	Laser beam energy Ep (J∙mm−2)	3.85	3.24	3.12	3.51
P3	Adjusted radius r (mm)	10.5	12.4	11.7	12.7
N = 500 W	Square side length lsq (mm)	18.6	21.9	20.7	22.6
vp = 500 mm·min−1	Laser beam energy Ep (J∙mm−2)	3.22	2.74	2.90	2.65
P7	Adjusted radius r (mm)	24.0	19.3	18.4	20.7
N = 1000 W	Square side length lsq (mm)	42.6	34.3	32.7	36.7
vp = 300 mm·min−1	Laser beam energy Ep (J∙mm−2)	4.69	5.83	6.12	5.45
P8	Adjusted radius r (mm)	35.1	32.9	35.9	31.2
N = 2000 W	Square side length lsq (mm)	62.1	58.2	63.6	55.2
vp = 300 mm·min−1	Laser beam energy Ep (J∙mm−2)	6.44	6.87	6.29	7.24