Modelling of open photoacoustic resonators

Photoacoustic spectroscopy employs acoustic resonators for signal amplification. Resonators are usually closed, however, in some applications, open resonators are preferred. The opening deteriorates the photoacoustic signal hence reducing the sensitivity of the photoacoustic measurement. We present...

Full description

Saved in:
Bibliographic Details
Published in:Photoacoustics (Munich) 2020-06, Vol.18, p.100161-100161, Article 100161
Main Authors: El-Busaidy, Said Ali Said, Baumann, Bernd, Wolff, Marcus, Duggen, Lars
Format: Article
Language:English
Subjects:
Finite element simulation
Open resonator
Photoacoustics
VSI: ICPPP-20
Windowless resonator
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Photoacoustic spectroscopy employs acoustic resonators for signal amplification. Resonators are usually closed, however, in some applications, open resonators are preferred. The opening deteriorates the photoacoustic signal hence reducing the sensitivity of the photoacoustic measurement. We present two new approaches for simulating the photoacoustic signal in open resonators using finite element modelling. The approaches are based on the amplitude mode expansion model and the viscothermal model with the opening modelled using perfectly matched layers and the boundary element method respectively. Additionally, the performance of the viscothermal model using perfectly matched layers for simulating open resonators is extended to the ultrasound region. The simulation results are verified by comparing them to photoacoustic measurements. The approaches provide an accurate basis for designing and optimizing open resonators with high sensitivity.
ISSN:2213-5979
2213-5979
DOI:10.1016/j.pacs.2020.100161