Open AccessOptical set-up for dynamic superposition of three laser beams for structuring and polishing applications
Author(s) -
André Temmler,
Oliver Pütsch,
Jochen Stollenwerk,
Edgar Willenborg,
Peter Loosen
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.001387
Subject(s) - polishing , laser , optics , materials science , structuring , superposition principle , beam (structure) , conical surface , optoelectronics , composite material , physics , finance , quantum mechanics , economics
Structuring by remelting is an innovative approach for structuring metallic surfaces with laser radiation, where no material is removed but reallocated while molten. Based on this remelting principle an innovative structuring technique is investigated, where laser beams are superposed. A melt pool is generated by a cw laser beam with constant feed rate. A pulsed laser is superposed onto the cw laser and evaporates a small amount of molten material and, therefore, generates vapour pressure, which shapes the melt pool surface. The solidification follows this newly shaped surface. For this process a new optical system was designed and built up, which allows the combination of cw and pulsed laser beams.