Frequency and duty cycle modulation optimization in minimizing thermal accumulation effect in Z-scan measurement with high-repetition-rate laser

Frequency and duty cycle modulation optimization in minimizing thermal accumulation effect in Z-scan measurement with high-repetition-rate laser

In this study, we demonstrate the optimization of the chopper frequency and duty cycle in a Z-scan measurement with a 250MHz high-repetitionrate(HRR)femtosecond laser to minimize the thermal lensing effect due to cumulative heating of the sample. The result shows that such minimization can be achie...

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Main Authors: Zainal Abidin, Mohd Shahnan, Muhammad Noor, Ahmad Shukri, Abdul Rashid, Suraya, Mahdi, Mohd Adzir
Format: Article
Language:English
Published: The Japan Society of Applied Physics 2014
Subjects:
QC Physics
TA1501 Applied optics. Lasers
Online Access:http://irep.iium.edu.my/38872/
http://irep.iium.edu.my/38872/
http://irep.iium.edu.my/38872/
http://irep.iium.edu.my/38872/1/JJAP_Mohd_Shahnan.pdf
id iium-38872
recordtype eprints
spelling iium-388722018-06-11T04:43:50Z http://irep.iium.edu.my/38872/ Frequency and duty cycle modulation optimization in minimizing thermal accumulation effect in Z-scan measurement with high-repetition-rate laser Zainal Abidin, Mohd Shahnan Muhammad Noor, Ahmad Shukri Abdul Rashid, Suraya Mahdi, Mohd Adzir QC Physics TA1501 Applied optics. Lasers In this study, we demonstrate the optimization of the chopper frequency and duty cycle in a Z-scan measurement with a 250MHz high-repetitionrate(HRR)femtosecond laser to minimize the thermal lensing effect due to cumulative heating of the sample. The result shows that such minimization can be achieved by keeping the modulated exposure time on the sample shorter than the thermal diffusivity decay time tc. The minimum chopper frequency fmin is predicted by relating the duty cycle factor F with tc, while maintaining stable peak and valley transmittances, i.e.,ΔTp and ΔTv, respectively. Furthermore, a lower fmin is obtained by taking a stable range of the peak–valley difference ΔTpv into consideration. The optimization allows for the low operational modulation frequency of Z-scan measurement with reduced thermal influence, thus enabling simple management of the thermal lensing effect. The Japan Society of Applied Physics 2014-10-27 Article PeerReviewed application/pdf en http://irep.iium.edu.my/38872/1/JJAP_Mohd_Shahnan.pdf Zainal Abidin, Mohd Shahnan and Muhammad Noor, Ahmad Shukri and Abdul Rashid, Suraya and Mahdi, Mohd Adzir (2014) Frequency and duty cycle modulation optimization in minimizing thermal accumulation effect in Z-scan measurement with high-repetition-rate laser. Japanese Journal of Applied Physics, 53 (112702). pp. 112702-1. ISSN 0021-4922 http://iopscience.iop.org/1347-4065/53/11/112702/article doi:10.7567/JJAP.53.112702
repository_type Digital Repository
institution_category Local University
institution International Islamic University Malaysia
building IIUM Repository
collection Online Access
language English
topic QC Physics
TA1501 Applied optics. Lasers
spellingShingle QC Physics
TA1501 Applied optics. Lasers
Zainal Abidin, Mohd Shahnan
Muhammad Noor, Ahmad Shukri
Abdul Rashid, Suraya
Mahdi, Mohd Adzir
Frequency and duty cycle modulation optimization in minimizing thermal accumulation effect in Z-scan measurement with high-repetition-rate laser
description In this study, we demonstrate the optimization of the chopper frequency and duty cycle in a Z-scan measurement with a 250MHz high-repetitionrate(HRR)femtosecond laser to minimize the thermal lensing effect due to cumulative heating of the sample. The result shows that such minimization can be achieved by keeping the modulated exposure time on the sample shorter than the thermal diffusivity decay time tc. The minimum chopper frequency fmin is predicted by relating the duty cycle factor F with tc, while maintaining stable peak and valley transmittances, i.e.,ΔTp and ΔTv, respectively. Furthermore, a lower fmin is obtained by taking a stable range of the peak–valley difference ΔTpv into consideration. The optimization allows for the low operational modulation frequency of Z-scan measurement with reduced thermal influence, thus enabling simple management of the thermal lensing effect.
format Article
author Zainal Abidin, Mohd Shahnan
Muhammad Noor, Ahmad Shukri
Abdul Rashid, Suraya
Mahdi, Mohd Adzir
author_facet Zainal Abidin, Mohd Shahnan
Muhammad Noor, Ahmad Shukri
Abdul Rashid, Suraya
Mahdi, Mohd Adzir
author_sort Zainal Abidin, Mohd Shahnan
title Frequency and duty cycle modulation optimization in minimizing thermal accumulation effect in Z-scan measurement with high-repetition-rate laser
title_short Frequency and duty cycle modulation optimization in minimizing thermal accumulation effect in Z-scan measurement with high-repetition-rate laser
title_full Frequency and duty cycle modulation optimization in minimizing thermal accumulation effect in Z-scan measurement with high-repetition-rate laser
title_fullStr Frequency and duty cycle modulation optimization in minimizing thermal accumulation effect in Z-scan measurement with high-repetition-rate laser
title_full_unstemmed Frequency and duty cycle modulation optimization in minimizing thermal accumulation effect in Z-scan measurement with high-repetition-rate laser
title_sort frequency and duty cycle modulation optimization in minimizing thermal accumulation effect in z-scan measurement with high-repetition-rate laser
publisher The Japan Society of Applied Physics
publishDate 2014
url http://irep.iium.edu.my/38872/
http://irep.iium.edu.my/38872/
http://irep.iium.edu.my/38872/
http://irep.iium.edu.my/38872/1/JJAP_Mohd_Shahnan.pdf
first_indexed 2023-09-18T20:55:51Z
last_indexed 2023-09-18T20:55:51Z
_version_ 1777410298579255296

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