1.
Opt Express
; 28(18): 26180-26188, 2020 Aug 31.
Artigo
em Inglês
| MEDLINE
| ID: mdl-32906894
RESUMO
We propose a method to monitor the progress of laser processing using laser speckle patterns. Laser grooving and percussion drilling were performed using femtosecond laser pulses. The speckle patterns from a processing point were monitored with a high-speed camera and analyzed with a deep neural network. The deep neural network enabled us to extract multiple information from the speckle pattern without a need for analytical formulation. The trained neural network was able to predict the ablation depth with an uncertainty of 2 µm, as well as the material under processing, which will be useful for composite material processing.