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Output Characterization of 220 nm Broadband 1250 nm Wavelength-Swept Laser for Dynamic Optical Fiber Sensors

Broadband wavelength-swept lasers (WSLs) are widely used as light sources in biophotonics and optical fiber sensors. Herein, we present a polygonal mirror scanning wavelength filter (PMSWF)-based broadband WSL using two semiconductor optical amplifiers (SOAs) with different center wavelengths as the...

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Autores principales: Lee, Gi Hyen, Ahn, Soyeon, Kim, Min Su, Lee, Sang Won, Kim, Ji Su, Choi, Byeong Kwon, Pagidi, Srinivas, Jeon, Min Yong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9696297/
https://www.ncbi.nlm.nih.gov/pubmed/36433461
http://dx.doi.org/10.3390/s22228867
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author Lee, Gi Hyen
Ahn, Soyeon
Kim, Min Su
Lee, Sang Won
Kim, Ji Su
Choi, Byeong Kwon
Pagidi, Srinivas
Jeon, Min Yong
author_facet Lee, Gi Hyen
Ahn, Soyeon
Kim, Min Su
Lee, Sang Won
Kim, Ji Su
Choi, Byeong Kwon
Pagidi, Srinivas
Jeon, Min Yong
author_sort Lee, Gi Hyen
collection PubMed
description Broadband wavelength-swept lasers (WSLs) are widely used as light sources in biophotonics and optical fiber sensors. Herein, we present a polygonal mirror scanning wavelength filter (PMSWF)-based broadband WSL using two semiconductor optical amplifiers (SOAs) with different center wavelengths as the gain medium. The 10-dB bandwidth of the wavelength scanning range with 3.6 kHz scanning frequency was approximately 223 nm, from 1129 nm to 1352 nm. When the scanning frequency of the WSL was increased, the intensity and bandwidth decreased. The main reason for this is that the laser oscillation time becomes insufficient as the scanning frequency increases. We analyzed the intensity and bandwidth decrease according to the increase in the scanning frequency in the WSL through the concept of saturation limit frequency. In addition, optical alignment is important for realizing broadband WSLs. The optimal condition can be determined by analyzing the beam alignment according to the position of the diffraction grating and the lenses in the PMSWF. This broadband WSL is specially expected to be used as a light source in broadband distributed dynamic FBG fiber-optic sensors.
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spelling pubmed-96962972022-11-26 Output Characterization of 220 nm Broadband 1250 nm Wavelength-Swept Laser for Dynamic Optical Fiber Sensors Lee, Gi Hyen Ahn, Soyeon Kim, Min Su Lee, Sang Won Kim, Ji Su Choi, Byeong Kwon Pagidi, Srinivas Jeon, Min Yong Sensors (Basel) Article Broadband wavelength-swept lasers (WSLs) are widely used as light sources in biophotonics and optical fiber sensors. Herein, we present a polygonal mirror scanning wavelength filter (PMSWF)-based broadband WSL using two semiconductor optical amplifiers (SOAs) with different center wavelengths as the gain medium. The 10-dB bandwidth of the wavelength scanning range with 3.6 kHz scanning frequency was approximately 223 nm, from 1129 nm to 1352 nm. When the scanning frequency of the WSL was increased, the intensity and bandwidth decreased. The main reason for this is that the laser oscillation time becomes insufficient as the scanning frequency increases. We analyzed the intensity and bandwidth decrease according to the increase in the scanning frequency in the WSL through the concept of saturation limit frequency. In addition, optical alignment is important for realizing broadband WSLs. The optimal condition can be determined by analyzing the beam alignment according to the position of the diffraction grating and the lenses in the PMSWF. This broadband WSL is specially expected to be used as a light source in broadband distributed dynamic FBG fiber-optic sensors. MDPI 2022-11-16 /pmc/articles/PMC9696297/ /pubmed/36433461 http://dx.doi.org/10.3390/s22228867 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
Lee, Gi Hyen
Ahn, Soyeon
Kim, Min Su
Lee, Sang Won
Kim, Ji Su
Choi, Byeong Kwon
Pagidi, Srinivas
Jeon, Min Yong
Output Characterization of 220 nm Broadband 1250 nm Wavelength-Swept Laser for Dynamic Optical Fiber Sensors
title Output Characterization of 220 nm Broadband 1250 nm Wavelength-Swept Laser for Dynamic Optical Fiber Sensors
title_full Output Characterization of 220 nm Broadband 1250 nm Wavelength-Swept Laser for Dynamic Optical Fiber Sensors
title_fullStr Output Characterization of 220 nm Broadband 1250 nm Wavelength-Swept Laser for Dynamic Optical Fiber Sensors
title_full_unstemmed Output Characterization of 220 nm Broadband 1250 nm Wavelength-Swept Laser for Dynamic Optical Fiber Sensors
title_short Output Characterization of 220 nm Broadband 1250 nm Wavelength-Swept Laser for Dynamic Optical Fiber Sensors
title_sort output characterization of 220 nm broadband 1250 nm wavelength-swept laser for dynamic optical fiber sensors
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9696297/
https://www.ncbi.nlm.nih.gov/pubmed/36433461
http://dx.doi.org/10.3390/s22228867
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