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Title:Time series analysis of duty cycle induced randomness in thermal lens system
Authors:ID Swapna, Mohanachandran Nair Sindhu, UNIVERSITY OF KERALA (Author)
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Language:English
Work type:Not categorized
Typology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract:The present work employs time series analysis, a proven powerful mathematical tool, for investigating the complex molecular dynamics of the thermal lens (TL) system induced by the duty cycle (C) variation. For intensity modulation, TL spectroscopy commonly uses optical choppers. The TL formation involves complex molecular dynamics that vary with the input photothermal energy, which is implemented by varying the duty cycle of the chopper. The molecular dynamics is studied from the fractal dimension (D), phase portrait, sample entropy (S), and Hurst exponent (H) for different duty cycles. The increasing value of C is found to increase D and S, indicating that the system is becoming complex and less deterministic, as evidenced by the phase portrait analysis. The value of H less than 0.5 conforms the evolution of the TL system to more anti-persistent nature with C. The increasing value of C increases the enthalpy of the system that appears as an increase in full width at half maximum of the refractive index profile. Thus the study establishes that the sample entropy and thermodynamic entropy are directly related.
Keywords:Time series analysis Fractal analysis Photothermal lens spectroscopy Fractal dimension Hurst exponent Sample entropy
Year of publishing:2020
Number of pages:5
Numbering:4, 212
PID:20.500.12556/RUNG-7469 New window
COBISS.SI-ID:113801475 New window
DOI:https://doi.org/10.1016/j.ijleo.2020.164720 New window
NUK URN:URN:SI:UNG:REP:ZNJG54FK
Publication date in RUNG:05.07.2022
Views:2577
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SWAPNA, Mohanachandran Nair Sindhu, 2020, Time series analysis of duty cycle induced randomness in thermal lens system. Optik - International Journal for Light and Electron Optics [online]. 2020. Vol. 4, no. 212. [Accessed 2 April 2025]. DOI https://doi.org/10.1016/j.ijleo.2020.164720. Retrieved from: https://repozitorij.ung.si/IzpisGradiva.php?lang=eng&id=7469
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Title:Optik - International Journal for Light and Electron Optics
Year of publishing:2020

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License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:04.07.2022

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