Development of a hybrid photoacoustic and optical monitoring system for the study of laser ablation processes upon the removal of encrustation from stonework

Journal Title: Opto-Electronic Advances - Year 2020, Vol 3, Issue 2

Abstract

In the context of this work, a prototype hybrid photoacoustic (PA) and optical system for the on-line monitoring of laser cleaning procedures is presented. The developed apparatus has enabled the detection of MHz frequency range acoustic waves generated during the laser ablation process. The intrinsically generated PA signals combined with high resolution optical images provide the opportunity to follow the cleaning process accurately and in real time. Technical mock-ups have been used to demonstrate the potential of this novel technique with emphasis given to applications that refer to the restoration of Cultural Heritage (CH) surfaces. Towards this purpose, the real time monitoring of the laser assisted removal of unwanted encrustation from stonework has been achieved using IR and UV wavelengths. This novel approach has allowed for the precise determination of the critical number of laser pulses required for the elimination of the encrustation layer, while highlighting the dominant ablation mechanisms according to the irradiation wavelength. The promising results obtained using the prototype hybrid PA and optical system can open up new perspectives in the monitoring of laser cleaning interventions, promoting an improved restoration outcome.

Authors and Affiliations

Athanasia Papanikolaou, George J. Tserevelakis, Kristalia Melessanaki, Costas Fotakis, Giannis Zacharakis*, Paraskevi Pouli*

Keywords

Related Articles

Polariton lasing in InGaN quantum wells at room temperature

In this paper, we report the exciton polaritons in both positive and negative detuning micro cavities based on InGaN multi-quantum wells (MQWs) and the first polariton lasing in InGaN/GaN MQWs at room temperature by util...

Lanthanide-based downshifting layers tested in a solar car race

The mismatch between the AM1.5G spectrum and the photovoltaic (PV) cells absorption is one of the most limiting factors for PV performance. To overcome this constraint through the enhancement of solar energy harvesting,...

Acoustic wave detection of laser shock peening

In order to overcome the existing disadvantages of offline laser shock peening detection methods, an online detection method based on acoustic wave signals energy is provided. During the laser shock peening, an acoustic...

Atomic layer deposition for quantum dots based devices

Quantum dots (QDs) are promising candidates for the next-generation optical and electronic devices due to the out-standing photoluminance efficiency, tunable bandgap and facile solution synthesis. Nevertheless, the limit...

Recent development of flat supercontinuum generation in specialty optical fibers

Supercontinuum (SC) generation has attracted a significant scientific interest in the past decades due to its promising applications covering the fields of metrology, spectroscopy, defense, as well as medical treatments....

Download PDF file
  • EP ID EP683125
  • DOI 10.29026/oea.2020.190037
  • Views 114
  • Downloads 0

How To Cite

Athanasia Papanikolaou, George J. Tserevelakis, Kristalia Melessanaki, Costas Fotakis, Giannis Zacharakis*, Paraskevi Pouli* (2020). Development of a hybrid photoacoustic and optical monitoring system for the study of laser ablation processes upon the removal of encrustation from stonework. Opto-Electronic Advances, 3(2), -. https://europub.co.uk/articles/-A-683125