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Design for Distributed Feedback Laser Biosensors Based on the Active Grating Model
The distributed feedback (DFB) laser is widely used in sensing because of its portable size, simple fabrication and high sensitivity. Most theoretical design models are based on passive Bragg gratings. However, passive grating models cannot be used to predict sensor performance using the important i...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6603634/ https://www.ncbi.nlm.nih.gov/pubmed/31195714 http://dx.doi.org/10.3390/s19112569 |
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author | Wang, Bowen Zhou, Yi Guo, Zhihe Wu, Xiang |
author_facet | Wang, Bowen Zhou, Yi Guo, Zhihe Wu, Xiang |
author_sort | Wang, Bowen |
collection | PubMed |
description | The distributed feedback (DFB) laser is widely used in sensing because of its portable size, simple fabrication and high sensitivity. Most theoretical design models are based on passive Bragg gratings. However, passive grating models cannot be used to predict sensor performance using the important indicator of figure of merit (FOM) through theoretical calculations. To solve this problem, we replaced the passive grating with an active grating by using the imaginary part of the coupling constant that represents the value of the gain. As a comparison, the influence of the full width at half maximum (FWHM) and sensitivity were analyzed for different grating duty cycles and depths in the passive grating sensors. To obtain a higher FOM in the active grating sensors, we systematically investigated the effects of duty cycle and gain value through numerical simulations. We found that the redshift caused by a duty cycle increase can improve the sensitivity of biomolecule detection by 1.7 times. |
format | Online Article Text |
id | pubmed-6603634 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-66036342019-07-17 Design for Distributed Feedback Laser Biosensors Based on the Active Grating Model Wang, Bowen Zhou, Yi Guo, Zhihe Wu, Xiang Sensors (Basel) Article The distributed feedback (DFB) laser is widely used in sensing because of its portable size, simple fabrication and high sensitivity. Most theoretical design models are based on passive Bragg gratings. However, passive grating models cannot be used to predict sensor performance using the important indicator of figure of merit (FOM) through theoretical calculations. To solve this problem, we replaced the passive grating with an active grating by using the imaginary part of the coupling constant that represents the value of the gain. As a comparison, the influence of the full width at half maximum (FWHM) and sensitivity were analyzed for different grating duty cycles and depths in the passive grating sensors. To obtain a higher FOM in the active grating sensors, we systematically investigated the effects of duty cycle and gain value through numerical simulations. We found that the redshift caused by a duty cycle increase can improve the sensitivity of biomolecule detection by 1.7 times. MDPI 2019-06-05 /pmc/articles/PMC6603634/ /pubmed/31195714 http://dx.doi.org/10.3390/s19112569 Text en © 2019 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 Wang, Bowen Zhou, Yi Guo, Zhihe Wu, Xiang Design for Distributed Feedback Laser Biosensors Based on the Active Grating Model |
title | Design for Distributed Feedback Laser Biosensors Based on the Active Grating Model |
title_full | Design for Distributed Feedback Laser Biosensors Based on the Active Grating Model |
title_fullStr | Design for Distributed Feedback Laser Biosensors Based on the Active Grating Model |
title_full_unstemmed | Design for Distributed Feedback Laser Biosensors Based on the Active Grating Model |
title_short | Design for Distributed Feedback Laser Biosensors Based on the Active Grating Model |
title_sort | design for distributed feedback laser biosensors based on the active grating model |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6603634/ https://www.ncbi.nlm.nih.gov/pubmed/31195714 http://dx.doi.org/10.3390/s19112569 |
work_keys_str_mv | AT wangbowen designfordistributedfeedbacklaserbiosensorsbasedontheactivegratingmodel AT zhouyi designfordistributedfeedbacklaserbiosensorsbasedontheactivegratingmodel AT guozhihe designfordistributedfeedbacklaserbiosensorsbasedontheactivegratingmodel AT wuxiang designfordistributedfeedbacklaserbiosensorsbasedontheactivegratingmodel |