Multi imaging-based beam shaping for ultrafast laser-material processing using spatial light modulators



Li, Jiangning, Tang, Yue ORCID: 0000-0002-4232-2513, Kuang, Zheng, Schille, Joerg, Loeschner, Udo, Perrie, Walter, Liu, Dun, Dearden, Geoff ORCID: 0000-0003-0648-7473 and Edwardson, Stuart ORCID: 0000-0001-5239-4409
(2019) Multi imaging-based beam shaping for ultrafast laser-material processing using spatial light modulators. OPTICS AND LASERS IN ENGINEERING, 112. pp. 59-67.

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Abstract

An imaging based beam shaping technique combined with parallel beam processing has been demonstrated. Binary and intensity masks have been designed and applied on phase only spatial light modulator (SLM) to shape the input laser beam in the desired profile and intensity distribution. A second SLM with a computer generated hologram(CGH) applied was used to split the incident picosecond laser beam. Hence, the laser beam was effectively converted to required target shape, intensity distribution and a separated pattern then reconstructed at the image plane of a focusing lens. The machined footprints on a polished Titanium (Ti6Al4V) substrate accurately match the desired beam in shape and depth distribution.

Item Type: Article
Uncontrolled Keywords: Laser beam shaping, Laser parallel beam processing, Spatial light modulator
Depositing User: Symplectic Admin
Date Deposited: 02 Oct 2018 11:24
Last Modified: 19 Jan 2023 01:15
DOI: 10.1016/j.optlaseng.2018.09.002
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3027001