Analytical modeling of nonlinear absorption in Z-scan measurements using super-Gaussian beams.
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| Title: | Analytical modeling of nonlinear absorption in Z-scan measurements using super-Gaussian beams. |
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| Authors: | Kessi, Ferhat1 (AUTHOR) ferhat.kessi@univ-bejaia.dz |
| Source: | Applied Physics B: Lasers & Optics. Oct2025, Vol. 131 Issue 10, p1-11. 11p. |
| Subjects: | Multiphoton absorption, Photonics, Gaussian beams, Optical measurements, Beam optics, Light transmission, Laser industry |
| Abstract: | This study presents a comprehensive theoretical and numerical investigation of multiphoton absorption (MPA) in Z-scan experiments using super-Gaussian laser beams. We developed an analytical model for normalized optical transmittance under weak nonlinearity approximation and performed extensive simulations examining the effects of varying MPA absorption order and super-Gaussian beam parameter. Our results reveal that flatter beam profiles consistently produce stronger nonlinear absorption effects across all multiphoton orders due to extended high-intensity regions that enhance interaction volumes. Lower-order MPA processes demonstrate greater overall absorption efficiency, with two-photon absorption showing the most dramatic transmittance reductions, while higher-order processes exhibit progressively weaker absorption despite their enhanced intensity sensitivity. Remarkably, while minimum transmittance varies significantly with beam profile, the Full Width at Half Maximum increases linearly with super-Gaussian parameters, revealing fundamental scaling relationships governing nonlinear interaction spatial extent. These findings establish important design principles for optical limiting systems, precision laser manufacturing, medical applications, and material characterization techniques, providing a comprehensive framework for optimizing nonlinear optical interactions through strategic beam profile selection and offering valuable insights for both fundamental research and practical applications in modern photonics. [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.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 188779247 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Analytical modeling of nonlinear absorption in Z-scan measurements using super-Gaussian beams. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Kessi%2C+Ferhat%22">Kessi, Ferhat</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> ferhat.kessi@univ-bejaia.dz</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>. Oct2025, Vol. 131 Issue 10, p1-11. 11p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Multiphoton+absorption%22">Multiphoton absorption</searchLink><br /><searchLink fieldCode="DE" term="%22Photonics%22">Photonics</searchLink><br /><searchLink fieldCode="DE" term="%22Gaussian+beams%22">Gaussian beams</searchLink><br /><searchLink fieldCode="DE" term="%22Optical+measurements%22">Optical measurements</searchLink><br /><searchLink fieldCode="DE" term="%22Beam+optics%22">Beam optics</searchLink><br /><searchLink fieldCode="DE" term="%22Light+transmission%22">Light transmission</searchLink><br /><searchLink fieldCode="DE" term="%22Laser+industry%22">Laser industry</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: This study presents a comprehensive theoretical and numerical investigation of multiphoton absorption (MPA) in Z-scan experiments using super-Gaussian laser beams. We developed an analytical model for normalized optical transmittance under weak nonlinearity approximation and performed extensive simulations examining the effects of varying MPA absorption order and super-Gaussian beam parameter. Our results reveal that flatter beam profiles consistently produce stronger nonlinear absorption effects across all multiphoton orders due to extended high-intensity regions that enhance interaction volumes. Lower-order MPA processes demonstrate greater overall absorption efficiency, with two-photon absorption showing the most dramatic transmittance reductions, while higher-order processes exhibit progressively weaker absorption despite their enhanced intensity sensitivity. Remarkably, while minimum transmittance varies significantly with beam profile, the Full Width at Half Maximum increases linearly with super-Gaussian parameters, revealing fundamental scaling relationships governing nonlinear interaction spatial extent. These findings establish important design principles for optical limiting systems, precision laser manufacturing, medical applications, and material characterization techniques, providing a comprehensive framework for optimizing nonlinear optical interactions through strategic beam profile selection and offering valuable insights for both fundamental research and practical applications in modern photonics. [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/s00340-025-08557-1 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 11 StartPage: 1 Subjects: – SubjectFull: Multiphoton absorption Type: general – SubjectFull: Photonics Type: general – SubjectFull: Gaussian beams Type: general – SubjectFull: Optical measurements Type: general – SubjectFull: Beam optics Type: general – SubjectFull: Light transmission Type: general – SubjectFull: Laser industry Type: general Titles: – TitleFull: Analytical modeling of nonlinear absorption in Z-scan measurements using super-Gaussian beams. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Kessi, Ferhat IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 10 Text: Oct2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 09462171 Numbering: – Type: volume Value: 131 – Type: issue Value: 10 Titles: – TitleFull: Applied Physics B: Lasers & Optics Type: main |
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