Narrow linewidth apodized coupling grating distributed feedback lasers enabled by enhanced uniformity of photon density distribution.
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| Title: | Narrow linewidth apodized coupling grating distributed feedback lasers enabled by enhanced uniformity of photon density distribution. |
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| Authors: | Luo, Dengfeng1,2 (AUTHOR), Zhang, Nan2 (AUTHOR) zhangn06@pcl.ac.cn, Wang, Lei2 (AUTHOR), Wang, Kai1 (AUTHOR) wangk@sustech.edu.cn |
| Source: | Applied Physics B: Lasers & Optics. Mar2025, Vol. 131 Issue 3, p1-12. 12p. |
| Subjects: | Optical communications, Distributed feedback lasers, Lasers, Uniformity, Computer simulation, Photons |
| Abstract: | Apodized coupling gratings distributed feedback (AC-DFB) lasers have demonstrated their ability to achieve narrow linewidth. However, the detailed impacts of facet coatings and the structural parameters of apodized coupling gratings on the longitudinal spatial hole burning (LSHB) effect, along with comprehensive evaluations of how the LSHB influences linewidth and in-depth optimizations in AC-DFB lasers, have yet to be thoroughly investigated. In this study, we present the physical models for AC-DFB lasers and utilize numerical simulations to investigate the influences of facet coatings and the structural parameters of apodized grating on the LSHB effect. The promoted uniformity of photon density distribution of AC-DFB lasers is achieved through the rational design of the apodized grating coupling coefficient distribution and length, which effectively modulates the optical field of the lasers. The further thorough analysis of AC-DFB laser linewidth, considering the impact of the LSHB effect, demonstrates that optimization can reduce linewidth broadening caused by the LSHB by 80.9%, narrowing the linewidth to 43.4 kHz at 120 mA with HR-AR facet coating. This study provides valuable insights into the precise optimization of AC-DFB laser, contributing to improved narrow linewidth performance and supporting their application in high-speed optical communication systems. [ABSTRACT FROM AUTHOR] |
| Copyright of Applied Physics B: Lasers & Optics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
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| Header | DbId: egs DbLabel: Engineering Source An: 183973834 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Narrow linewidth apodized coupling grating distributed feedback lasers enabled by enhanced uniformity of photon density distribution. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Luo%2C+Dengfeng%22">Luo, Dengfeng</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Nan%22">Zhang, Nan</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> zhangn06@pcl.ac.cn</i><br /><searchLink fieldCode="AR" term="%22Wang%2C+Lei%22">Wang, Lei</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Kai%22">Wang, Kai</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> wangk@sustech.edu.cn</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Applied+Physics+B%3A+Lasers+%26+Optics%22">Applied Physics B: Lasers & Optics</searchLink>. Mar2025, Vol. 131 Issue 3, p1-12. 12p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Optical+communications%22">Optical communications</searchLink><br /><searchLink fieldCode="DE" term="%22Distributed+feedback+lasers%22">Distributed feedback lasers</searchLink><br /><searchLink fieldCode="DE" term="%22Lasers%22">Lasers</searchLink><br /><searchLink fieldCode="DE" term="%22Uniformity%22">Uniformity</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+simulation%22">Computer simulation</searchLink><br /><searchLink fieldCode="DE" term="%22Photons%22">Photons</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Apodized coupling gratings distributed feedback (AC-DFB) lasers have demonstrated their ability to achieve narrow linewidth. However, the detailed impacts of facet coatings and the structural parameters of apodized coupling gratings on the longitudinal spatial hole burning (LSHB) effect, along with comprehensive evaluations of how the LSHB influences linewidth and in-depth optimizations in AC-DFB lasers, have yet to be thoroughly investigated. In this study, we present the physical models for AC-DFB lasers and utilize numerical simulations to investigate the influences of facet coatings and the structural parameters of apodized grating on the LSHB effect. The promoted uniformity of photon density distribution of AC-DFB lasers is achieved through the rational design of the apodized grating coupling coefficient distribution and length, which effectively modulates the optical field of the lasers. The further thorough analysis of AC-DFB laser linewidth, considering the impact of the LSHB effect, demonstrates that optimization can reduce linewidth broadening caused by the LSHB by 80.9%, narrowing the linewidth to 43.4 kHz at 120 mA with HR-AR facet coating. This study provides valuable insights into the precise optimization of AC-DFB laser, contributing to improved narrow linewidth performance and supporting their application in high-speed optical communication systems. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Applied Physics B: Lasers & Optics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s00340-025-08434-x Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 12 StartPage: 1 Subjects: – SubjectFull: Optical communications Type: general – SubjectFull: Distributed feedback lasers Type: general – SubjectFull: Lasers Type: general – SubjectFull: Uniformity Type: general – SubjectFull: Computer simulation Type: general – SubjectFull: Photons Type: general Titles: – TitleFull: Narrow linewidth apodized coupling grating distributed feedback lasers enabled by enhanced uniformity of photon density distribution. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Luo, Dengfeng – PersonEntity: Name: NameFull: Zhang, Nan – PersonEntity: Name: NameFull: Wang, Lei – PersonEntity: Name: NameFull: Wang, Kai IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 03 Text: Mar2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 09462171 Numbering: – Type: volume Value: 131 – Type: issue Value: 3 Titles: – TitleFull: Applied Physics B: Lasers & Optics Type: main |
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