Single-shot laser beam parameter measurement system for near-infrared laser beams

0517141 - FZÚ 2020 RIV US eng J - Journal Article
Nagisetty, Siva S. - Miura, Taisuke - Chyla, Michal - Smrž, Martin - Mocek, Tomáš
Single-shot laser beam parameter measurement system for near-infrared laser beams.
Journal of the Optical Society of America. B. Roč. 36, č. 11 (2019), s. 3098-3103. ISSN 0740-3224. E-ISSN 1520-8540
R&D Projects: GA MŠMT EF15_006/0000674; GA MŠMT LO1602; GA MŠMT LM2015086
EU Projects: European Commission(XE) 739573 - HiLASE CoE
Grant - others:OP VVV - HiLASE-CoE(XE) CZ.02.1.01/0.0/0.0/15_006/0000674
Institutional support: RVO:68378271
Keywords : laser beam parameters * focus shift using Yaglass * telecentric lens
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 2.180, year: 2019
Method of publishing: Limited access
https://doi.org/10.1364/josab.36.003098

We present a simple and fast technique for measuring laser beam parameters, including focus shift using Yaglass, a telecentric lens, and a camera. Our technique is based on imaging of visible fluorescence that represents caustic of the focused near-infrared laser beam. By processing a single camera frame, a large number of second-moment beam diameters are calculated simultaneously without any need for a traditional scan in the propagation direction. The M2 values measured with this method and standard method are in excellent agreement.We extend this technique to measure the focus shift and focus spot size. This method is fast and allows the real-time monitoring of laser beam parameters simultaneously during the manufacturing process.
Permanent Link: http://hdl.handle.net/11104/0302431