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Analysis and Suppression of Laser Intensity Fluctuation in a Dual-Beam Optical Levitation System

Levitated micro-resonators in vacuums have attracted widespread attention due to their application potential in precision force sensing, acceleration sensing, mass measurement and gravitational wave sensing. The optically levitated microsphere in a counter-propagating dual-beam optical trap has been...

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Autores principales: Wang, Xia, Zhu, Qi, Hu, Mengzhu, Li, Wenqiang, Chen, Xingfan, Li, Nan, Zhu, Xunmin, Hu, Huizhu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9320985/
https://www.ncbi.nlm.nih.gov/pubmed/35888800
http://dx.doi.org/10.3390/mi13070984
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author Wang, Xia
Zhu, Qi
Hu, Mengzhu
Li, Wenqiang
Chen, Xingfan
Li, Nan
Zhu, Xunmin
Hu, Huizhu
author_facet Wang, Xia
Zhu, Qi
Hu, Mengzhu
Li, Wenqiang
Chen, Xingfan
Li, Nan
Zhu, Xunmin
Hu, Huizhu
author_sort Wang, Xia
collection PubMed
description Levitated micro-resonators in vacuums have attracted widespread attention due to their application potential in precision force sensing, acceleration sensing, mass measurement and gravitational wave sensing. The optically levitated microsphere in a counter-propagating dual-beam optical trap has been of particular interest because of its large measurement range and flexible manipulation. In this system, laser intensity fluctuation directly influences the trap stability and measurement sensitivity, which makes it a crucial factor in improving trapping performance. In this paper, a time-varying optical force (TVOF) model is established to characterize the influence of laser intensity fluctuation in a dual-beam optical trap. The model describes the relationship between the laser intensity fluctuation, optical force and the dynamic motion of the micro-sized sphere. In addition, an external laser intensity control method is proposed, which achieved a 16.9 dB laser power stability control at the relaxation oscillation frequency. The long-term laser intensity fluctuation was suppressed from 3% to 0.4% in a one-hour period. Experiments showed that the particle’s position detection sensitivity and the stability of the relaxation oscillation could be improved by laser intensity fluctuation suppression.
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spelling pubmed-93209852022-07-27 Analysis and Suppression of Laser Intensity Fluctuation in a Dual-Beam Optical Levitation System Wang, Xia Zhu, Qi Hu, Mengzhu Li, Wenqiang Chen, Xingfan Li, Nan Zhu, Xunmin Hu, Huizhu Micromachines (Basel) Article Levitated micro-resonators in vacuums have attracted widespread attention due to their application potential in precision force sensing, acceleration sensing, mass measurement and gravitational wave sensing. The optically levitated microsphere in a counter-propagating dual-beam optical trap has been of particular interest because of its large measurement range and flexible manipulation. In this system, laser intensity fluctuation directly influences the trap stability and measurement sensitivity, which makes it a crucial factor in improving trapping performance. In this paper, a time-varying optical force (TVOF) model is established to characterize the influence of laser intensity fluctuation in a dual-beam optical trap. The model describes the relationship between the laser intensity fluctuation, optical force and the dynamic motion of the micro-sized sphere. In addition, an external laser intensity control method is proposed, which achieved a 16.9 dB laser power stability control at the relaxation oscillation frequency. The long-term laser intensity fluctuation was suppressed from 3% to 0.4% in a one-hour period. Experiments showed that the particle’s position detection sensitivity and the stability of the relaxation oscillation could be improved by laser intensity fluctuation suppression. MDPI 2022-06-22 /pmc/articles/PMC9320985/ /pubmed/35888800 http://dx.doi.org/10.3390/mi13070984 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Wang, Xia
Zhu, Qi
Hu, Mengzhu
Li, Wenqiang
Chen, Xingfan
Li, Nan
Zhu, Xunmin
Hu, Huizhu
Analysis and Suppression of Laser Intensity Fluctuation in a Dual-Beam Optical Levitation System
title Analysis and Suppression of Laser Intensity Fluctuation in a Dual-Beam Optical Levitation System
title_full Analysis and Suppression of Laser Intensity Fluctuation in a Dual-Beam Optical Levitation System
title_fullStr Analysis and Suppression of Laser Intensity Fluctuation in a Dual-Beam Optical Levitation System
title_full_unstemmed Analysis and Suppression of Laser Intensity Fluctuation in a Dual-Beam Optical Levitation System
title_short Analysis and Suppression of Laser Intensity Fluctuation in a Dual-Beam Optical Levitation System
title_sort analysis and suppression of laser intensity fluctuation in a dual-beam optical levitation system
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9320985/
https://www.ncbi.nlm.nih.gov/pubmed/35888800
http://dx.doi.org/10.3390/mi13070984
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