Dynamic Compensation of Path Length Difference in Optical Coherence Tomography by an Automatic Temperature Control System of Optical Fiber

Optical fiber is widely used in optical coherence tomography (OCT) to propagate light precisely with low attenuation and low dispersion. However, the total optical path length within the optical fiber varies in accordance with changes of the temperature. This leads changes in the total optical trave...

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Main Authors: Daewoon Seong, Sangyeob Han, Deokmin Jeon, Yoonseok Kim, Ruchire Eranga Wijesinghe, Naresh Kumar Ravichandran, Jaeyul Lee, Junsoo Lee, Pilun Kim, Dong-Eun Lee, Mansik Jeon, Jeehyun Kim
Format: Article
Language:English
Published: IEEE 2020-01-01
Series:IEEE Access
Subjects:
Online Access:https://ieeexplore.ieee.org/document/9078072/
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author Daewoon Seong
Sangyeob Han
Deokmin Jeon
Yoonseok Kim
Ruchire Eranga Wijesinghe
Naresh Kumar Ravichandran
Jaeyul Lee
Junsoo Lee
Pilun Kim
Dong-Eun Lee
Mansik Jeon
Jeehyun Kim
author_facet Daewoon Seong
Sangyeob Han
Deokmin Jeon
Yoonseok Kim
Ruchire Eranga Wijesinghe
Naresh Kumar Ravichandran
Jaeyul Lee
Junsoo Lee
Pilun Kim
Dong-Eun Lee
Mansik Jeon
Jeehyun Kim
author_sort Daewoon Seong
collection DOAJ
description Optical fiber is widely used in optical coherence tomography (OCT) to propagate light precisely with low attenuation and low dispersion. However, the total optical path length within the optical fiber varies in accordance with changes of the temperature. This leads changes in the total optical travel path of the interfering signals and results in shifting of OCT image position to an unintended depth pixel value. In this paper, we presented the temperature-based automatic path length compensating method in OCT to limit the external temperature effect and control the image position in micro-scale without manual movement of optical components. By utilizing developed hardware and software of automatic temperature control system, the external temperature of optical fiber is precisely regulated that evokes thermal expansion and finally changes the physical length of fiber, which is main mechanism of temperature-based path length compensating method. The effectiveness of the presented method was verified by two-dimensional OCT images of mirror and in vivo retina. The obtained results confirmed the path length variance due to temperature change is computable and can be regulated in real-time for whole pixel range of OCT image. Therefore, the proposed temperature-based path length compensating method can be used as an alternative method to precisely control the position of OCT image, while eliminating the effect of external temperature and apply to effectively configuring compact optical systems.
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spelling doaj.art-f822d319ce084c6dbbfe96f82d1f19372022-12-21T18:14:43ZengIEEEIEEE Access2169-35362020-01-018775017751010.1109/ACCESS.2020.29903579078072Dynamic Compensation of Path Length Difference in Optical Coherence Tomography by an Automatic Temperature Control System of Optical FiberDaewoon Seong0Sangyeob Han1Deokmin Jeon2Yoonseok Kim3Ruchire Eranga Wijesinghe4Naresh Kumar Ravichandran5https://orcid.org/0000-0002-3712-5304Jaeyul Lee6Junsoo Lee7https://orcid.org/0000-0001-8146-6862Pilun Kim8Dong-Eun Lee9Mansik Jeon10https://orcid.org/0000-0003-2271-1885Jeehyun Kim11School of Electronics Engineering, College of IT Engineering, Kyungpook National University, Daegu, South KoreaSchool of Electronics Engineering, College of IT Engineering, Kyungpook National University, Daegu, South KoreaSchool of Electronics Engineering, College of IT Engineering, Kyungpook National University, Daegu, South KoreaSchool of Electronics Engineering, College of IT Engineering, Kyungpook National University, Daegu, South KoreaDepartment of Biomedical Engineering, College of Engineering, Kyungil University, Gyeongsan, South KoreaSchool of Electronics Engineering, College of IT Engineering, Kyungpook National University, Daegu, South KoreaSchool of Electronics Engineering, College of IT Engineering, Kyungpook National University, Daegu, South KoreaSchool of Electronics Engineering, College of IT Engineering, Kyungpook National University, Daegu, South KoreaSchool of Medicine, Institute of Biomedical Engineering, Kyungpook National University, Daegu, South KoreaSchool of Architecture and Civil Engineering, Kyungpook National University, Daegu, South KoreaSchool of Electronics Engineering, College of IT Engineering, Kyungpook National University, Daegu, South KoreaSchool of Electronics Engineering, College of IT Engineering, Kyungpook National University, Daegu, South KoreaOptical fiber is widely used in optical coherence tomography (OCT) to propagate light precisely with low attenuation and low dispersion. However, the total optical path length within the optical fiber varies in accordance with changes of the temperature. This leads changes in the total optical travel path of the interfering signals and results in shifting of OCT image position to an unintended depth pixel value. In this paper, we presented the temperature-based automatic path length compensating method in OCT to limit the external temperature effect and control the image position in micro-scale without manual movement of optical components. By utilizing developed hardware and software of automatic temperature control system, the external temperature of optical fiber is precisely regulated that evokes thermal expansion and finally changes the physical length of fiber, which is main mechanism of temperature-based path length compensating method. The effectiveness of the presented method was verified by two-dimensional OCT images of mirror and in vivo retina. The obtained results confirmed the path length variance due to temperature change is computable and can be regulated in real-time for whole pixel range of OCT image. Therefore, the proposed temperature-based path length compensating method can be used as an alternative method to precisely control the position of OCT image, while eliminating the effect of external temperature and apply to effectively configuring compact optical systems.https://ieeexplore.ieee.org/document/9078072/Optical fiberautomatic temperature control systemthermal expansionmicro position controloptical coherence tomography
spellingShingle Daewoon Seong
Sangyeob Han
Deokmin Jeon
Yoonseok Kim
Ruchire Eranga Wijesinghe
Naresh Kumar Ravichandran
Jaeyul Lee
Junsoo Lee
Pilun Kim
Dong-Eun Lee
Mansik Jeon
Jeehyun Kim
Dynamic Compensation of Path Length Difference in Optical Coherence Tomography by an Automatic Temperature Control System of Optical Fiber
IEEE Access
Optical fiber
automatic temperature control system
thermal expansion
micro position control
optical coherence tomography
title Dynamic Compensation of Path Length Difference in Optical Coherence Tomography by an Automatic Temperature Control System of Optical Fiber
title_full Dynamic Compensation of Path Length Difference in Optical Coherence Tomography by an Automatic Temperature Control System of Optical Fiber
title_fullStr Dynamic Compensation of Path Length Difference in Optical Coherence Tomography by an Automatic Temperature Control System of Optical Fiber
title_full_unstemmed Dynamic Compensation of Path Length Difference in Optical Coherence Tomography by an Automatic Temperature Control System of Optical Fiber
title_short Dynamic Compensation of Path Length Difference in Optical Coherence Tomography by an Automatic Temperature Control System of Optical Fiber
title_sort dynamic compensation of path length difference in optical coherence tomography by an automatic temperature control system of optical fiber
topic Optical fiber
automatic temperature control system
thermal expansion
micro position control
optical coherence tomography
url https://ieeexplore.ieee.org/document/9078072/
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