Formation of microdots on the surface of cobalt-doped borosilicate glass by a Nd:YAG laser

Formation of microdots on the surface of cobalt-doped borosilicate glass by a Nd:YAG laser

We have demonstrated the formation of microdots on the surface of a cobalt-doped borosilicate glass by laser irradiation. The glass was irradiated by a Q-switched Nd:YAG (SHG) laser. A bump with a Gaussian shape was formed in a small area on the glass surface after irradiation. The distribution of temperature on the irradiated surface due to the laser beam profile, optical absorption and thermal diffusion was inferred as the origin of the bump shape. The maximum peak height was about 16 μm and the diameter was 262.3 μm. This process gives us the possibility for a micro lens fabrication process with the use of borosilicate glass and a Nd:YAG laser.

We have demonstrated the formation of microdots on the surface of a cobalt-doped borosilicate glass by laser irradiation. The glass was irradiated by a Q-switched Nd:YAG (SHG) laser. A bump with a Gaussian shape was formed in a small area on the glass surface after irradiation. The distribution of temperature on the irradiated surface due to the laser beam profile, optical absorption and thermal diffusion was inferred as the origin of the bump shape. The maximum peak height was about 16 μm and the diameter was 262.3 μm. This process gives us the possibility for a micro lens fabrication process with the use of borosilicate glass and a Nd:YAG laser.