Abstract

We report a laser adaptive processing technology (LAPT) for the selective removal of Cu/Al multilayer dissimilar materials. Using the wavelength range and intensity distribution of the characteristic spectrum, the properties and content of multilayer dissimilar materials can be analyzed online based on laser-induced breakdown spectroscopy. The traditional low-speed spectral detection mode was transformed into a high-speed photoelectric detection method by using a scheme consisting of a bandpass filter with an avalanche photodetector (APD), and the in situ online detection of a 30 ns, 40 kHz high-frequency pulse signal during laser scanning was realized. Combined with a field programmable gate array (FPGA) digital control unit, online feedback and closed-loop control were achieved at the kHz level, and the adaptive intelligent control of material interfaces and laser processing parameters was achieved. This excellently demonstrated the feasibility and flexibility of LAPT for processing arbitrary multilayer dissimilar materials.

© 2023 Optica Publishing Group

Insight into the surface behavior and dynamic absorptivity of laser removal of multilayer materials

Guiyang Yang, Le Liu, Qiaodan Chen, Wei Xiong, and Leimin Deng
Opt. Express 31(23) 37483-37494 (2023)

Femtosecond laser direct writing multilayer chiral waveplates with minimal linear birefringence

Jiafeng Lu, Enrique Garcia-Caurel, Razvigor Ossikovski, Francois Courvoisier, Xianglong Zeng, Bertrand Poumellec, and Matthieu Lancry
Opt. Lett. 48(2) 271-274 (2023)

Technological process optimization and measurement of image quality of the electrically bifocal metalens

Chun-Yuan Fan, Pei-Yu Tang, Vin-Cent Su, Ko-Ting Cheng, Chia-Yu Teng, Ming-Yu Tsai, Chia-Hung Chiang, Kai-Lun Xu, and Guo-Dung J. Su
Opt. Lett. 48(17) 4452-4455 (2023)

Influence of defects on the femtosecond laser damage resistance of multilayer dielectric gratings

Simin Zhang, Ziyao Su, Carmen S. Menoni, and Enam A. Chowdhury
Opt. Lett. 48(5) 1212-1215 (2023)

Impact of the multilayer dielectric design on the laser-induced damage threshold of pulse compression gratings for petawatt-class lasers

Saaxewer Diop, Nicolas Bonod, Marine Chorel, Éric Lavastre, Nadja Roquin, Lilian Heymans, Pierre Brianceau, Laurent Gallais, and Laurent Lamaignère
Opt. Lett. 48(17) 4669-4672 (2023)