《Engineering》极端制造前沿学术专题研讨会

Hiroshima University Japan

Yasuhiro Okamoto is a Professor, Mechanical Engineering Program Graduate School of AdvancedScience and Engineering Faculty of Natural Science and Technology, Hiroshima University. He has anextensive research background in the areas of precision machining, and his research activities has beenin both micro and macro applications of laser materials processing. He has published 98 peer-reviewedjournal publications, over 100 conference presentations for international conference, 57 invited talks and22 approved patents.

A picosecond pulsed laser with a high repetition rate has a possibility to perform micro-welding of glass.However, when the pulse energy increases in order to achieve a high processing speed, the excessiveenergy input accompanies a risk of crack generation. Thus, micro-welding of glass using multi-spotfocusing generated by a spatial light modulator was experimentally investigated. It was suggested thatmulti-spot focusing has a possibility to avoid the generation of crack, although a large pulse energy isused to create a wide width of weld bead.