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Arsenic Detection Using Surface Plasmon Resonance Sensor With Hydrous Ferric Oxide Layer
Yasmin MUSTAPHA KAMIL 1Sura Hmoud AL-REKABI 2Muhammad Hafiz ABU BAKAR 3Yap Wing FEN 4,5[ ... ]Mohd Adzir MAHDI 3,*
Author Affiliations
Abstract
1 inLAZER Dynamics Sdn Bhd, InnoHub Unit, Putra Science Park, Universiti Putra Malaysia, Serdang 43400, Malaysia
2 Electrical Engineering Department, Al Suwayrah Technical Institute, Middle Technical University, Baghdad 10074, Iraq
3 Wireless and Photonic Networks Research Centre, Faculty of Engineering, Universiti Putra Malaysia, Serdang 43400, Malaysia
4 Institute of Advanced Technology, Universiti Putra Malaysia, Serdang 43400, Malaysia
5 Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Malaysia
6 Electronic and Communication Engineering Department, College of Engineering, University of Baghdad, Baghdad 10071, Iraq
7 Department of Electrical Engineering, College of Engineering, King Saud University, Riyadh 11421, Kingdom of Saudi Arabia
The lethality of inorganic arsenic (As) and the threat it poses have made the development of efficient As detection systems a vital necessity. This research work demonstrates a sensing layer made of hydrous ferric oxide (Fe2H2O4) to detect As(III) and As(V) ions in a surface plasmon resonance system. The sensor conceptualizes on the strength of Fe2H2O4 to absorb As ions and the interaction of plasmon resonance towards the changes occurring on the sensing layer. Detection sensitivity values for As(III) and As(V) were 1.083 ℃ ppb–1 and 0.922 ℃ ppb–1, respectively, while the limit of detection for both ions was 0.6 ppb. These findings support the feasibility and potential of the sensor configuration towards paving future advancement in As detection systems.
Surface plasmon resonance di-iron trioxide hydrate arsenic heavy metals ion optical sensor 
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Photonic Sensors
2022, 12(3): 220306
Lasers and laser optics
Mode-locked fiber laser in the C-band region for dual-wavelength ultrashort pulses emission using a carbon nanotube saturable absorberEditors' PickDownload：968次
Kuen Yao Lau 1Pin Jern Ker 1Ahmad Fauzi Abas 2Mohammed Thamer Alresheedi 2Mohd Adzir Mahdi 3,*
Author Affiliations
Abstract
1 Electronics Research Group, Institute of Power Engineering, Universiti Tenaga Nasional, 43000 Kajang, Selangor, Malaysia
2 Department of Electrical Engineering, College of Engineering, King Saud University, Riyadh 11421, Kingdom of Saudi Arabia
3 Wireless and Photonics Networks Research Centre, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
A saturable absorber is commonly employed to generate an ultrashort laser with a mode-locking scheme. In an erbium-doped fiber laser system, the laser regimes of either 1530 or 1550 nm wavelength are procured based on the absorption profile of the erbium-doped fiber. The absorption of the erbium-doped fiber is designed to emit at both wavelengths by controlling the net gain of the laser cavity. Subsequently, simultaneous erbium-doped fiber laser emission is attained at 1533.5 and 1555.1 nm with the pulse duration of 910 and 850 fs, respectively. Therefore, this work maximizes the output portfolios of a mode-locking fiber laser for dual-wavelength ultrashort pulses emission.
140.3538 Lasers, pulsed 190.7110 Ultrafast nonlinear optics 320.7090 Ultrafast lasers 
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Chinese Optics Letters
2019, 17(5): 051401
Fiber Optics and Optical Communications
Broad bandwidth SOA-based multiwavelength laser incorporating a bidirectional Lyot filterDownload：642次
Abdul Hadi Sulaiman 1,2,*Muhammad Zamzuri Abdul Kadir 3Nelidya Md Yusoff 4Noran Azizan Cholan 5[ ... ]Mohd Adzir Mahdi 1
Author Affiliations
Abstract
1 Wireless and Photonic Networks Research Center, Faculty of Engineering, University Putra Malaysia, 43400 UPM Serdang, Malaysia
2 Institute of Power Engineering, Universiti Tenaga Nasional, Jalan IKRAM-UNITEN, 43000 Kajang, Malaysia
3 Department of Physics, Kulliyyah of Science, International Islamic University Malaysia, 25710 Kuantan, Malaysia
4 Razak School of Engineering & Advanced Technology, Universiti Teknologi Malaysia Kuala Lumpur, Jalan Sultan Yahya Petra, 54100 Kuala Lumpur, Malaysia
5 Department of Communication Engineering, Faculty of Electrical and Electronics Engineering Universiti Tun Hussein Onn Malaysia, 86400 Batu Pahat, Malaysia
6 Department of Electrical Engineering, College of Engineering, King Saud University, Riyadh 11421, Saudi Arabia
We demonstrate a broad bandwidth multiwavelength laser based on a bidirectional Lyot filter and a semiconductor optical amplifier with a mechanism of intensity-dependent loss as the flatness agent. A wide bandwidth of a multiwavelength spectrum of 32.9 nm within a 5 dB uniformity is obtained under optimized polarization parameters. For this case, the number of generated lasing lines is 329 with a fixed wavelength separation of 0.1 nm. The power stability of this multiwavelength laser is less than 1.35 dB within 200 min time frame. This shows that the bidirectional Lyot filter provides an alternative option for multiwavelength generation in laser systems.
060.3510 Lasers, fiber 140.3510 Lasers, fiber 060.4370 Nonlinear optics, fibers 
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Chinese Optics Letters
2018, 16(9): 090603
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