[20a-W321-1~10] 3.7 Laser processing

△ [20a-W321-1] Relationship between irradiation time and size of melting marks in femtosecond laser processing inside glass

〇Aoi Matsumoto¹, Kazuyoshi Kurita¹, Takayuki Tamaki¹, Keisuke Yahata², Etsuji Ohmura³ (1.NIT, Nara College, 2.Mistuboshi Diamond Industrial Co.LTD., 3.Osaka Univ.)

Keywords:femtosecond laser,BK7 glass,luminescence phenomenon

We observed melting marks formed by femtosecond laser processing inside glasses. Furthermore, we observed luminescence phenomenon occur femtosecond laser processing inside glasses. If this luminescence phenomenon is laser induced plasma, we were able to estimate that femtosecond laser microprocessing was carried out extremely in a short time. Thus, it is thought that the main process of the femtosecond laser microprocessing to the glass inside is performed in the time when it extremely has a short it of the 2/1000 [s].