Amjad Ali

ORCID: 0000-0003-3782-4794
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Research Areas
  • Optical Network Technologies
  • Advanced Photonic Communication Systems
  • Optical Wireless Communication Technologies
  • Luminescence Properties of Advanced Materials
  • Advanced Fiber Laser Technologies
  • Advanced Fiber Optic Sensors
  • Semiconductor Lasers and Optical Devices
  • Gas Sensing Nanomaterials and Sensors
  • Photonic and Optical Devices
  • Plasmonic and Surface Plasmon Research
  • Image Enhancement Techniques
  • Thermography and Photoacoustic Techniques
  • Orbital Angular Momentum in Optics
  • Advanced Image Fusion Techniques
  • Inorganic Fluorides and Related Compounds
  • Advanced Semiconductor Detectors and Materials
  • Advanced Optical Network Technologies
  • Wireless Communication Networks Research
  • Ferroelectric and Piezoelectric Materials
  • Digital Holography and Microscopy
  • Agriculture Sustainability and Environmental Impact
  • Electrical and Thermal Properties of Materials
  • Plant Disease Resistance and Genetics
  • Dielectric properties of ceramics
  • Metamaterials and Metasurfaces Applications

University of Swat
2025

Zhejiang University
2019-2024

Sivas State Hospital
2024

Sivas Bilim ve Teknoloji Üniversitesi
2024

University of Engineering and Technology Lahore
2017-2024

Zhejiang University-University of Edinburgh Institute
2024

Zhejiang Ocean University
2019-2024

University of Engineering and Technology Peshawar
2014-2023

Peking University
2021

Friedrich-Alexander-Universität Erlangen-Nürnberg
2017-2020

We experimentally demonstrate high-speed visible light communication (VLC) and high-quality solid-state lighting (SSL) using polymethyl-methacrylate-doped phosphor film based on cesium lead bromide quantum dot (CsPbBr3-QD) potassium fluorosilicate K2SiF6:Mn4+, which is excited by a blue gallium nitride laser diode. A 1.6 Gbps data rate achieved employing non-return-to-zero on-off keying modulation scheme. The measured bit error of 2.7×10-3 adheres to the standard threshold (3.8×10-3) forward...

10.1364/ao.392340 article EN Applied Optics 2020-05-14

Organizational justice leads toward organizational prosperity, social harmony, and a congenial working environment. It has positive effects on the routine spatial activities of organization. This study aims to examine how influences promotion citizenship behavior among teaching staff government universities Malakand division. For said purpose quantitative research methodology was used in this study. The population for consisted all public Division which includes University Malakand, Swat,...

10.59075/f04bze66 article EN cc-by ˜The œcritical review of social sciences studies 2025-02-13

An architecture for flattened and broad spectrum multicarriers is presented by generating 60 comb lines from pulsed laser driven user-defined bit stream in cascade with three modulators. The proposed scheme a cost-effective optical line terminal (OLT) wavelength division multiplexed passive network (WDM-PON) system. frequency generator consists of phase modulator two Mach–Zehnder modulators an RF source incorporating no shifter, filter, or electrical amplifier. Optical generation deployed...

10.1117/1.oe.55.9.096106 article EN cc-by Optical Engineering 2016-09-09

We propose a cost-effective multi-carrier generation technique which minimizes the passive optical access network (PON) costs. In this study replacement of laser array with source at line terminal (OLT) side in PON is addressed. With 25-GHz frequency spacing, generated multi-carriers exhibit good tone to noise ratio (TNR) i. e. above 20dB, and least amplitude difference 1.5dB. At OLT, signal based multiplexed differential phase shift keying (DPSK) data from all channels each having 10Gbps...

10.1109/cc.2016.7513204 article EN China Communications 2016-06-01

In this paper, we first propose and then experimentally demonstrate underwater wireless-to-plastic optical fiber (POF) communication system with a fully passive lens installed at the front end of POF. A 2-m low-cost POF is used as an extender to efficiently increase transmission distance easily deliver laser beam desired place. fiber-pigtailed green diode (520 nm) 68 mA current was transmit beam. high coupling efficiency 88% measured in our system, which significantly higher than from calm...

10.1109/icocn.2019.8934143 article EN 2022 20th International Conference on Optical Communications and Networks (ICOCN) 2019-08-01

In this study, we proposed and experimentally demonstrated the blue laser diode-based remote solid-state lighting using plastic optical fiber phosphor film. The light-emitting part’s vicinity is free of electricity, which eliminates risk explosion electromagnetic interference (EMI) thus can find wide applications in hazardous or sensitive locations, such as gas plants aircraft, to name a few. color attributes generated white light were studied by calculating correlated temperature (CCT),...

10.1149/2162-8777/abd51b article EN cc-by ECS Journal of Solid State Science and Technology 2020-12-18

A new scheme is offered for minimizing carrier Rayleigh backscattering (CRB) in single feeder fiber based wavelength division multiplexed passive optical network (WDM-PON). The proposed on side band suppressed (SSB-CS)signal, both at and receiver sides, used the first time line terminal (OLT) unit (ONU)sides. We use dual-drive Mach-zehnder modulator (DD-MZM)for generating SSB-CS signals, which decreased expense per bit full transmission. SSB-S mitigated CRB, OLT ONU because of having no...

10.1109/cc.2016.7897540 article EN China Communications 2016-12-01

This paper presents an improved method for imaging in turbid water by using the individual strengths of quadrature lock-in discrimination (QLD) and retinex method. At first, high-speed QLD is performed on images, aiming at capturing ballistic photons. Then, we perform image enhancement QLD-processed images to enhance contrast image. Next, effect uneven illumination suppressed bilateral gamma function adaptive correction. The experimental results depict that proposed approach achieves better...

10.3788/col202321.101102 article EN Chinese Optics Letters 2023-01-01

Dense wavelength division multiplexed (DWDM) transmission equal to 1.2 Tbps over 25 50 km across standard single-mode fiber (SSMF) in the C band is performed based on an optical frequency comb generator. Sixty-one flattened tones were realized with 30-GHz spacing, high side-mode suppression ratio 35 dB, and minimum amplitude difference was using modulator for first time cascade mode two Mach–Zehnder modulators (MZMs) where all tailored by RF signals. 20×61 Gbps DWDM-based differential...

10.1117/1.oe.57.1.010501 article EN Optical Engineering 2018-01-04

Fiber optic communications are inevitable to achieve higher data rates of modern telecom networks. After utilization Wavelength division multiplexing, order modulations and polarization mode multiplexing is a new dimension transmission capacity for optical fiber communication links. Different spatial distributions energy along cross sectional area allows simultaneous by considering each as an independent channel. During such transmissions, possibility mixing signals amongst modes causes...

10.22581/muet1982.2304.2868 article EN cc-by Mehran University Research Journal of Engineering and Technology 2023-10-04

Peplography is a three-dimensional (3D) approach for the visualization of targets in environments characterized by heavy scattering. It detects ballistic photons and subsequently generates 3D image using integral imaging, where expected number set arbitrarily. However, it affects robustness method accuracy analysis results. Therefore, we propose to determine optimal based on maximum entropy photon counting image. Because visualizing may be compromised due extraneous fluctuations intensity,...

10.1364/ao.522546 article EN Applied Optics 2024-05-07
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