H
Harith Ahmad
Researcher at University of Malaya
Publications - 1197
Citations - 14394
Harith Ahmad is an academic researcher from University of Malaya. The author has contributed to research in topics: Fiber laser & Laser. The author has an hindex of 45, co-authored 1126 publications receiving 11904 citations. Previous affiliations of Harith Ahmad include Airlangga University & University of Glasgow.
Papers
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Journal ArticleDOI
Characterization of phasemask interference visibility and the evolution of grating visibility during grating formation
Kok-Sing Lim,Dinusha Serandi Gunawardena,Man-Hong Lai,Rajibul Islam,Hangzhou Yang,Hangzhou Yang,Xueguang Qiao,Amin Malek Mohammadi,Harith Ahmad +8 more
TL;DR: In this article, a simple mathematical model was proposed to explain the formation of grating structure in photosensitive germane-silica fibers written by KrF excimer laser and phasemask.
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Effect of two annealing processes on the thermal regeneration of fiber Bragg gratings in hydrogenated standard optical fibers.
Kai Lu,Hangzhou Yang,Kok-Sing Lim,Harith Ahmad,Pan Zhang,Qin Tian,Xiangzi Ding,Xueguang Qiao +7 more
TL;DR: The experimental results show that the regenerated gratings that are preannealed at 700°C have charted a reflectivity larger than 65%.
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Dual-wavelength laser generation using highly concentrated erbium-doped fibre coupling with microfibre knot resonator
TL;DR: In this paper, a 2 m-long erbium-doped fiber (EDF) with a microfibre knot resonator (MKR) structure at the output end is demonstrated using a dual-wavelength fiber laser.
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Long Wavelength Plasmonic Absorption Enhancement in Silicon Using Optical Lithography Compatible Core-Shell-Type Nanowires
Mohammed Shahriar Sabuktagin,Khairus Syifa Hamdan,Khaulah Sulaiman,Rozalina Zakaria,Harith Ahmad +4 more
TL;DR: In this paper, the plasmonic properties of rectangular core-shell type nanowires embedded in thin-film silicon solar cell structure were characterized using FDTD simulations, and the results indicate that high volume fabrication capacity of optical lithography techniques can be utilized for plasmoric absorption enhancement in thin film silicon solar cells over the entire long wavelength range of solar radiation.
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1.3 μm fiber grating in a thin-core fiber for LP01-LP11 mode converters and sensing ability.
TL;DR: An all-fiber structure that can realize LP01-LP11 mode conversion and twist measurement is demonstrated and it is found that the different core size of the TCF between the fiber and the grating has an impact on the excitation of a higher-order mode and mode conversion efficiency.