Artifact suppression and improved signal-to-noise ratio by phase-locked multiplexed coherent imaging

被引：0

作者：

Giamberardino, Michael ^{[1
]}

Krause, Tessa J. H. ^{[1
]}

Fraser, James M. ^{[1
]}

机构：

[1] Queens Univ, Dept Phys Engn Phys & Astron, Kingston, ON K7L 3N6, Canada

来源：

OPTICS LETTERS | 2024年 / 49卷 / 03期

基金：

加拿大创新基金会; 加拿大自然科学与工程研究理事会;

关键词：

LASER; TOMOGRAPHY; MORPHOLOGY;

D O I：

10.1364/OL.503939

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Laser additive manufacturing (AM) promises direct metal 3D printing, but is held back by defects and process instabilities, giving rise to a need for in situ process monitoring. Inline coherent imaging (ICI) has proven effective for in situ, direct measurements of vapor depression depth and shape in AM and laser welding, but struggles to track turbulent interfaces due to poor coupling back into a single -mode fiber and the presence of artifacts. By z -domain multiplexing, we achieve phase -sensitive image consolidation, automatically attenuating autocorrelation artifacts and improving interface tracking rates by 58% in signal -starved applications. (c) 2024 Optica Publishing Group

引用

页码：738 / 741

页数：4