Percussion Nd:YAG Laser-incision of Radiata Pine: Effects of Laser Processing Parameters and Wood Anatomy

Laser-incision is gaining recognition in the timber processing industry as a preferred and competitive technique for increasing uptake of chemical preservative treatments. This work details percussion Nd:YAG laser-incision Radiata Pine, conducted at different wavelengths, incident laser energies focal point positions. For first time, effect wood anatomy (latewood earlywood tissues) on efficiency quality Pine explored. wavelengths 1064 nm (fundamental wavelength), 532 (second harmonic) 355 (third were used to understand their laser-incised hole characteristics. A maximum diameter ~ 2.5 mm was measured 700 pulses. The presence latewood had distinct shape evolution, showing importance process laser-incision. Ultra-violet (UV) radiation (355 nm) wavelength it gave rise less carbonisation, tapering uniform incision along length holes. Maximum depth (~ 20 mm) using wavelength. Incident energy, dominant role size, quality. demonstrates critical when considering utilising technology produce incisions treatment preservation industries.