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Acousto-Optic–Based Wavelength-Comb-Swept Laser for Extended Displacement Measurements
We demonstrate a novel wavelength-comb-swept laser based on two intra-cavity filters: an acousto-optic tunable filter (AOTF) and a Fabry-Pérot etalon filter. The AOTF is used for the tunable selection of the output wavelength with time and the etalon filter for the narrowing of the spectral linewidt...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5421700/ https://www.ncbi.nlm.nih.gov/pubmed/28362318 http://dx.doi.org/10.3390/s17040740 |
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author | Park, Nam Su Chun, Soo Kyung Han, Ga-Hee Kim, Chang-Seok |
author_facet | Park, Nam Su Chun, Soo Kyung Han, Ga-Hee Kim, Chang-Seok |
author_sort | Park, Nam Su |
collection | PubMed |
description | We demonstrate a novel wavelength-comb-swept laser based on two intra-cavity filters: an acousto-optic tunable filter (AOTF) and a Fabry-Pérot etalon filter. The AOTF is used for the tunable selection of the output wavelength with time and the etalon filter for the narrowing of the spectral linewidth to extend the coherence length. Compared to the conventional wavelength-swept laser, the acousto-optic–based wavelength-comb-swept laser (WCSL) can extend the measureable range of displacement measurements by decreasing the sensitivity roll-off of the point spread function. Because the AOTF contains no mechanical moving parts to select the output wavelength acousto-optically, the WCSL source has a high wavenumber (k) linearity of R(2) = 0.9999 to ensure equally spaced wavelength combs in the wavenumber domain. |
format | Online Article Text |
id | pubmed-5421700 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-54217002017-05-12 Acousto-Optic–Based Wavelength-Comb-Swept Laser for Extended Displacement Measurements Park, Nam Su Chun, Soo Kyung Han, Ga-Hee Kim, Chang-Seok Sensors (Basel) Article We demonstrate a novel wavelength-comb-swept laser based on two intra-cavity filters: an acousto-optic tunable filter (AOTF) and a Fabry-Pérot etalon filter. The AOTF is used for the tunable selection of the output wavelength with time and the etalon filter for the narrowing of the spectral linewidth to extend the coherence length. Compared to the conventional wavelength-swept laser, the acousto-optic–based wavelength-comb-swept laser (WCSL) can extend the measureable range of displacement measurements by decreasing the sensitivity roll-off of the point spread function. Because the AOTF contains no mechanical moving parts to select the output wavelength acousto-optically, the WCSL source has a high wavenumber (k) linearity of R(2) = 0.9999 to ensure equally spaced wavelength combs in the wavenumber domain. MDPI 2017-03-31 /pmc/articles/PMC5421700/ /pubmed/28362318 http://dx.doi.org/10.3390/s17040740 Text en © 2017 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Park, Nam Su Chun, Soo Kyung Han, Ga-Hee Kim, Chang-Seok Acousto-Optic–Based Wavelength-Comb-Swept Laser for Extended Displacement Measurements |
title | Acousto-Optic–Based Wavelength-Comb-Swept Laser for Extended Displacement Measurements |
title_full | Acousto-Optic–Based Wavelength-Comb-Swept Laser for Extended Displacement Measurements |
title_fullStr | Acousto-Optic–Based Wavelength-Comb-Swept Laser for Extended Displacement Measurements |
title_full_unstemmed | Acousto-Optic–Based Wavelength-Comb-Swept Laser for Extended Displacement Measurements |
title_short | Acousto-Optic–Based Wavelength-Comb-Swept Laser for Extended Displacement Measurements |
title_sort | acousto-optic–based wavelength-comb-swept laser for extended displacement measurements |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5421700/ https://www.ncbi.nlm.nih.gov/pubmed/28362318 http://dx.doi.org/10.3390/s17040740 |
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