Publications - XARION Laser Acoustics

Nature Photonics 10/2023

Acousto-optic modulation of gigawatt-scale laser pulses in ambient air

Authors:

Yannick Schrödel, Claas Hartmann, et.al.

Contents:

XARION's optical microphone has been used to measure high-intensity ultrasonic fields
Schrödel et al. from DESY Hamburg showed deflection of gigawatt-scale laser pulses in air
Controlling coherent light is crucial in many fields, but modern photonics faces limitations from factors like wavelength and high optical powers
Using ultrasound-tailored gaseous media to efficiently deflect laser pulses offers new possibilities for resilient optical elements
To measure and characterize the ultrasound fields used for deflection, XARION’s Optical Microphone was used

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Composite Structures 10/23

Low-velocity impact behaviour of biocomposite laminates reinforced by flax, basalt and hybrid fibres at various temperatures: Analytical, numerical and experimental results

Authors:

Valentina Giammaria, Simonetta Boria, Josef Pörnbacher, et.al.

Contents:

The impact behavior of bio-composites reinforced with flax, basalt and hybrid fibers was investigated
XARION’s LEA method was used to assess the internal damage of the composites after impact

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Wood Material Science & Engineering 05/2023

Supervised classification of wood species during milling based on extracted cut events from ultrasonic air-borne acoustic signals

Authors:

Mehieddine Derbas, Stephan Frömel-Frybort, Christian Laaber, Hans-Christian Möhring, Martin Riegler

Contents:

Monitoring during wood processing is gaining momentum in order to increase efficiency and enable adaptive manufacturing
Acoustic monitoring is particularly suited for the cutting/milling process
Derbas et al. developed a Machine Learning model to distinguish between wood species with up to 93% accuracy using single-cut events

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Optics and Laser Technology 04/2023

A comprehensive study on water jet guided laser micro hole drilling of an aerospace alloy

Authors:

Levent Subasi, Mustafa I. Gokler, Ulas Yaman

Contents:

Water-Jet Guided Laser Drilling is a process particularly suited for manufacturing of thin and long holes in metals
In this study, the Optical Microphone has proven to be a suitable sensor for monitoring the hole depth and the moment of hole breakthrough in real-time

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12th International Electric Drives Production Conference (EDPC) 01/23

Inline Process Monitoring of Hairpin Welding Using Optical and Acoustic Quality Metrics

Authors:

Markus Omlor, Johannes Reith, et.al.

Contents:

XARION´s Optical Microphone was used to capture airborne ultrasound generated during the hairpin welding process
A multitude of welds were performed under varying quality-affecting parameter conditions, such as positioning misalignments or focal height and laser power deviations
It was found that the real-time ultrasound emission could be utilized as an early indicator for predicting the important quality criterium of final cross-sectional area of connection

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Proceedings of LANE 2022 Erlangen 09/2022

Monitoring of remote laser processes using air-coupled ultrasound

Authors:

R. Sommerhuber, M. Kettner

Contents:

XARION’s optical microphone was used for contact-free monitoring of laser processes by comparing the acoustic emissions of the process to known reference signals
In this paper, this monitoring method was shown to be able to detect defects and irregularities in the welding of metal sheets and of direct copper bonded substrates

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Int. J. Adv. Manuf. Technology 08/2022

Real-time measurement of laser beam characteristics for a waterjet-guided laser machine

Authors:

Levent Subasi, Mustafa I. Gokler, Ulas Yaman

Contents:

Waterjet-guided laser machining, a novel process used for precision cutting and drilling, was monitored using XARION’s optical microphone
Various process parameters, such as the laser power in the water, could be measured more precisely than with other real-time monitoring methods investigated

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Springer 03/2022

Handbook of Nondestructive Evaluation 4.0

Authors:

Norbert Meyendorf, Nathan Ida, et.al.

Contents:

This handbook is a comprehensive overview of advanced NDE technologies for use in many different industrial applications
XARION is represented with a chapter on its innovative automated spot-weld inspection technology

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Composite Structures 05/2022

Effect of basalt intraply hybridization on the damage tolerance of flax laminates: Experimental analysis and analytical modeling under low-velocity impact

Authors:

Elena Raponi, Balthasar Fischer, Josef Pörnbacher et. al.

Contents:

Flax, basalt, and hybrid flax/basalt/epoxy composites were subjected to low velocity impact tests to study their toughness
The samples were subsequently investigated using XARION’s contact and couplant-free Laser Excited Acoustics (LEA) method
The LEA method allowed detection and quantitative assessment of internal damages in the different composites

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Tech Briefs 09/2021

Monitoring Additive Manufacturing with an Optical Microphone

Authors:

Martin Ursprung, Ryan Sommerhuber, et.al.

Contents:

XARION’s ultrasound sensor enables process monitoring of Additive Manufacturing processes
Defects such as the formation of cracks can be detected during Laser Metal Deposition and Powder Bed Fusion processes
Critical process parameters can be observed during Wire Arc Additive Manufacturing

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