[19a-PA4-1~13] 3.7 Laser processing

[19a-PA4-8] Drilling of Wood by Longitudinally Excited CO₂ laser

〇(M2)Hayato Goto¹, Kazuyuki Uno¹, Takahisa Jitsuno² (1.Univ. Yamanashi, 2.ILE, Osaka Univ.)

Keywords:CO2 laser, laser processing, drilling of wood

Wood is used for various products. Laser micro-fabrication of wood is important. A CO₂ laser is absorbed by the wood. Therefore, the CO₂ laser will drill the wood. In drilling of wood by the CO₂ laser, the control of laser pulse waveform may be important for the improvement of drilling efficiency and the control of HAZ. Therefore, we used a longitudinally excited CO₂ laser to control the laser pulse waveform. In this work, a drilling depth of 2.513 mm was produced by a total irradiation fluence of 1476 J/cm².