Cargando…
Active waveguide Bragg lasers via conformal contact PDMS stamps
Lasing is observed in Bragg lasers formed through conformal contact of a patterned PDMS stamp with a plain active film, spincoated on glass. The thresholds, output efficiencies and spectral characteristics are compared to standard substrate patterned gratings and is discussed in relation to the coup...
Autores principales: | , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2022
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9789066/ https://www.ncbi.nlm.nih.gov/pubmed/36564483 http://dx.doi.org/10.1038/s41598-022-26218-7 |
_version_ | 1784858893833207808 |
---|---|
author | Li, Yun Lakhwani, Girish |
author_facet | Li, Yun Lakhwani, Girish |
author_sort | Li, Yun |
collection | PubMed |
description | Lasing is observed in Bragg lasers formed through conformal contact of a patterned PDMS stamp with a plain active film, spincoated on glass. The thresholds, output efficiencies and spectral characteristics are compared to standard substrate patterned gratings and is discussed in relation to the coupling coefficient [Formula: see text] . The reported thresholds are highly sensitive in distributed feedback (DFB) lasers to grating duty cycles, for both PDMS-air and substrate–film lasers. Overall, laser thresholds of PDMS-air (PA) DFB lasers are found to be significantly higher than substrate–film (SF) lasers, which is attributed to an approximate three-fold reduction of optical-confinement in the grating region. Slope output efficiencies are found to be comparatively higher in PA lasers relative to SF lasers for both DFB and DBR configurations and is attributed to several competing factors. The PDMS can be removed from the surface of the active film repeatedly and conformal contact is limited mainly by the particle build up on the PDMS surface. The proposed PA system is expected to be useful in rapid laser metrology of new gain materials and in practical applications of optically pumped lasers. |
format | Online Article Text |
id | pubmed-9789066 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-97890662022-12-25 Active waveguide Bragg lasers via conformal contact PDMS stamps Li, Yun Lakhwani, Girish Sci Rep Article Lasing is observed in Bragg lasers formed through conformal contact of a patterned PDMS stamp with a plain active film, spincoated on glass. The thresholds, output efficiencies and spectral characteristics are compared to standard substrate patterned gratings and is discussed in relation to the coupling coefficient [Formula: see text] . The reported thresholds are highly sensitive in distributed feedback (DFB) lasers to grating duty cycles, for both PDMS-air and substrate–film lasers. Overall, laser thresholds of PDMS-air (PA) DFB lasers are found to be significantly higher than substrate–film (SF) lasers, which is attributed to an approximate three-fold reduction of optical-confinement in the grating region. Slope output efficiencies are found to be comparatively higher in PA lasers relative to SF lasers for both DFB and DBR configurations and is attributed to several competing factors. The PDMS can be removed from the surface of the active film repeatedly and conformal contact is limited mainly by the particle build up on the PDMS surface. The proposed PA system is expected to be useful in rapid laser metrology of new gain materials and in practical applications of optically pumped lasers. Nature Publishing Group UK 2022-12-23 /pmc/articles/PMC9789066/ /pubmed/36564483 http://dx.doi.org/10.1038/s41598-022-26218-7 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Li, Yun Lakhwani, Girish Active waveguide Bragg lasers via conformal contact PDMS stamps |
title | Active waveguide Bragg lasers via conformal contact PDMS stamps |
title_full | Active waveguide Bragg lasers via conformal contact PDMS stamps |
title_fullStr | Active waveguide Bragg lasers via conformal contact PDMS stamps |
title_full_unstemmed | Active waveguide Bragg lasers via conformal contact PDMS stamps |
title_short | Active waveguide Bragg lasers via conformal contact PDMS stamps |
title_sort | active waveguide bragg lasers via conformal contact pdms stamps |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9789066/ https://www.ncbi.nlm.nih.gov/pubmed/36564483 http://dx.doi.org/10.1038/s41598-022-26218-7 |
work_keys_str_mv | AT liyun activewaveguidebragglasersviaconformalcontactpdmsstamps AT lakhwanigirish activewaveguidebragglasersviaconformalcontactpdmsstamps |