jalil ali | Universiti Teknologi Malaysia - UTM (original) (raw)
Papers by jalil ali
The 2nd International …, 2007
In this paper a butterfly laser diode transmitter module is coupled into single mode fiber via du... more In this paper a butterfly laser diode transmitter module is coupled into single mode fiber via dual small ball lenses, which are aligned and fixed during an active alignment process where the laser diode is powered and the output power is continuously measured to determine the ...
Journal of Nonliner Optical Physics & Materials, 2008
Coupling of highly elliptical laser diode emission into single mode fiber using two spherical bal... more Coupling of highly elliptical laser diode emission into single mode fiber using two spherical ball lenses is investigated and the effectiveness of the mode matching with the circular mode field of the fiber is realized. Coupling efficiency is theoretically analyzed by employing ray and Gaussian beam optics. A 100% coupling efficiency is obtained is found to be largely affected by the angular, lateral and transversal offsets. It can also be controlled significantly by optimizing the lenses separation distance. The experimental measurements agree with ...
... 17, pp. 282-285, 2007. [2] M. Shahid Rafique, M. Khaleeq-ur-Rahman, Muhammad Shahbaz Anwar, F... more ... 17, pp. 282-285, 2007. [2] M. Shahid Rafique, M. Khaleeq-ur-Rahman, Muhammad Shahbaz Anwar, Faryaal Mahmood Afshan Ashfaq and Khurram Siraj. "Angular distribution and forward peaking of laser produced plasma ions" Laser and Particle Beams, vol. 23, pp. ...
This book gathers the latest research from around the globe on the subject of lasers and optics r... more This book gathers the latest research from around the globe on the subject of lasers and optics research.
Journal of geriatric oncology, Jan 26, 2018
Cancer prevalence and geriatric patients (GP) are increasing and about half of the patients with ... more Cancer prevalence and geriatric patients (GP) are increasing and about half of the patients with cancer will be offered radiotherapy (RT). Addressing GP and their RT needs is an important issue in order to understand this heterogeneous group of patients. A descriptive cross-sectional study, using a convenience sample from Sulaimani city's inhabitants, aged 70-year and more, who were treated with RT at the only city's RT center, Zhianawa Cancer Center (ZCC), in 2015. 153 patients' charts were reviewed. GP represented 20% of the patients referred to ZCC. Male: Female ratio was 3:1. One third presented with distant metastases, and 46% were treated with curative intent versus 54% with palliative intent. 94% completed the planned sessions of the curative RT vs 90% of the palliative RT. 23% of GP who were referred for RT didn't receive it. 9% got interruptions during RT course. 10% of GP living >40 km away from the treatment center refused treatment. Mean time interval ...
Nanoscience and Nanotechnology Letters
ABSTRACT The use of microring resonators (MRRs) has shown promising applications in the microscal... more ABSTRACT The use of microring resonators (MRRs) has shown promising applications in the microscale regime. We propose a MRR interferometer system for optical spectroscopy use. Atom/photons are fed into the system by adding the dark soliton pulses, where the Gaussian beam with central wavelength of λ0 = 1.5 μm is inserted into the input port. The dark soliton-Gaussian beam collision results on generation of stable optical tweezer with FWHM, FSR and optical depth of 0.8 nm, 3.1 nm and 10.8 mW and potential well with FWHM, FSR and optical depth of 2 nm, 2.7 nm and 293 mW respectively. The output photons from the drop port pass through the object, interact with the surface and will be reflected back into the interferometer system. The collision process can be controlled within the control port, where the interference signal is observed at the through port. Here, the output power deviation from the through port when the target is not in contact with the system and when it interacts with the soliton pulses from the drop port can be determine and analyzed. Thus, a nano atom/photon trapping and transmission system can be implemented within the MRR interferometer system for optical spectroscopy and material's surface analysis. Copyright © 2013 American Scientific Publishers All rights reserved.
Quantum Matter
ABSTRACT We propose a system of microring resonator (MRR) incorporating with an add/drop filter s... more ABSTRACT We propose a system of microring resonator (MRR) incorporating with an add/drop filter system under nonlinearity condition where trapping of single and multi optical soliton can be simulated and used to many applications in optical switching and signal processing. Nonlinear Kerr effect type of the light inside the MRR induces the chaotic behavior within the device. By using appropriate soliton input power and MRR parameters, continuous spatial and temporal signals are generated spreading over the spectrum. In this work, narrow single and multi pulse of solitons can be trapped within the proposed system. There are two forms of localized soliton pulses as spatial and temporal in which required security can be performed via ultra-short pulses of soliton where the high capacity can be obtained using multiple trapping techniques. Results obtained show that single temporal and spatial soliton pulse of 4.8 picosecond (ps), 17.5 picometer (pm), 712 femtosecond (fs), 0.34 nanometer (nm) and 84 fs could be trapped where multi soliton pulses with FSR of 1.45 nm, 3.6 nanosecond (ns) and FWHM of 40 pm, 140 ps are localized within the add/drop filter system.
IOSR Journal of Applied Physics
IOSR Journal of Applied Physics
Microwave and Optical Technology Letters
IOSR Journal of Applied Physics
Journal of Biosensors & Bioelectronics
Journal of Fusion Energy
The Plasma Focus has wide-ranging applications due to its intense radiation of SXR, XR, electron ... more The Plasma Focus has wide-ranging applications due to its intense radiation of SXR, XR, electron and ion beams and fusion neutrons when operated in deuterium. The 5-phase Lee Model code has been developed for the focus operated in various gases including D, D-T, He, Ne, N, O, Ar, Kr and Xe. Radiation-coupled motion is included in the modelling. In this paper we look at the effect of radiation cooling and radiation collapse in krypton. The Pease-Braginskii current is that current flowing in a hydrogen pinch which is just large enough for the Bremsstrahlung to balance Joule heating. This radiationcooled threshold current for a hydrogen pinch is 1.6 MA. It is known that in gases undergoing line radiation strongly the radiation-cooled threshold current is considerably lowered. We show that the equations of the Lee Model code may be used to compute this lowering. The code also shows the effect of radiation cooling leading to radiative collapse. Numerical experiments based on experimentally fitted model parameters are run to demonstrate a regime in which radiation collapse is observed in Kr at a pinch current of 50-100 kA.
Quantum Matter
ABSTRACT This paper presents a technique of abnormal cell removal using ultra short pulses of opt... more ABSTRACT This paper presents a technique of abnormal cell removal using ultra short pulses of optical tweezers. This technique uses a Half Panda Ring Resonator (HPRR) made of nonlinear fiber optics to generate desired results, which are applicable to medical applications. This system consists of a centered ring resonator connected to smaller ring resonators on the left side which is a good candidate for nanoscale interferometer applications. The optical tweezers generated by the dark soliton propagating inside the system are in the form of potential wells. Optical tweezers can trap microscopic dielectric particles using radiation pressure of light. This technique has the unique ability to trap and manipulate molecules at the mesoscopic scale using molecular buffers. Optical tweezers with Full Width at Half Maximum (FWHM) of 3.58 nm interact with nano particles within the molecular buffer system, thus optical trapping occurs. Therefore the nano particles are used to be transmitted to a biological tissue in order to remove abnormal cells by direct collision, thus the collision of the particles will result in an exchange of energy and damage to the cells.
Quantum Matter
ABSTRACT A system of add/drop can be used as an interferometer system to generate nano bandwidth ... more ABSTRACT A system of add/drop can be used as an interferometer system to generate nano bandwidth of optical tweezers. Dark soliton-Gaussian control within the proposed system is analyzed. Optical tweezers have the unique ability to trap and manipulate particles at the mesoscopic scale. The proposed system can be applied to generate nano-sized bandwidth peaks of optical tweezers in the form of potential wells. The dynamic behavior of the tweezers occurred when the Gaussian laser pulse is added into the system. Here, tweezers with Full Width at Half Maximum (FWHM) of 12 nm could be generated. This technique is applicable for cellular surgery due to the precise setting and small diameter of the nano tweezers. Therefore, the interaction of the nano tweezers with injected gold nano particles contributes to transferring of heat to the abnormal cells leads to removal surgery process, thus tweezers can be used to selectively eliminate cellular components in individual cells.
Journal of Computational and Theoretical Nanoscience
Abstract Coupling of highly elliptical laser diode emission into single mode fiber using two sphe... more Abstract Coupling of highly elliptical laser diode emission into single mode fiber using two spherical ball lenses is investigated and the effectiveness of the mode matching with the circular mode field of the fiber is realized. Coupling efficiency is theoretically analyzed by employing ray and Gaussian beam optics. A 100% coupling efficiency is obtained at an optimum working distance of 3.5 mm. the coupling efficiency is found to be largely affected by the angular, lateral and transversal offsets. It can also be controlled significantly by ...
The 2nd International …, 2007
In this paper a butterfly laser diode transmitter module is coupled into single mode fiber via du... more In this paper a butterfly laser diode transmitter module is coupled into single mode fiber via dual small ball lenses, which are aligned and fixed during an active alignment process where the laser diode is powered and the output power is continuously measured to determine the ...
Journal of Nonliner Optical Physics & Materials, 2008
Coupling of highly elliptical laser diode emission into single mode fiber using two spherical bal... more Coupling of highly elliptical laser diode emission into single mode fiber using two spherical ball lenses is investigated and the effectiveness of the mode matching with the circular mode field of the fiber is realized. Coupling efficiency is theoretically analyzed by employing ray and Gaussian beam optics. A 100% coupling efficiency is obtained is found to be largely affected by the angular, lateral and transversal offsets. It can also be controlled significantly by optimizing the lenses separation distance. The experimental measurements agree with ...
... 17, pp. 282-285, 2007. [2] M. Shahid Rafique, M. Khaleeq-ur-Rahman, Muhammad Shahbaz Anwar, F... more ... 17, pp. 282-285, 2007. [2] M. Shahid Rafique, M. Khaleeq-ur-Rahman, Muhammad Shahbaz Anwar, Faryaal Mahmood Afshan Ashfaq and Khurram Siraj. "Angular distribution and forward peaking of laser produced plasma ions" Laser and Particle Beams, vol. 23, pp. ...
This book gathers the latest research from around the globe on the subject of lasers and optics r... more This book gathers the latest research from around the globe on the subject of lasers and optics research.
Journal of geriatric oncology, Jan 26, 2018
Cancer prevalence and geriatric patients (GP) are increasing and about half of the patients with ... more Cancer prevalence and geriatric patients (GP) are increasing and about half of the patients with cancer will be offered radiotherapy (RT). Addressing GP and their RT needs is an important issue in order to understand this heterogeneous group of patients. A descriptive cross-sectional study, using a convenience sample from Sulaimani city's inhabitants, aged 70-year and more, who were treated with RT at the only city's RT center, Zhianawa Cancer Center (ZCC), in 2015. 153 patients' charts were reviewed. GP represented 20% of the patients referred to ZCC. Male: Female ratio was 3:1. One third presented with distant metastases, and 46% were treated with curative intent versus 54% with palliative intent. 94% completed the planned sessions of the curative RT vs 90% of the palliative RT. 23% of GP who were referred for RT didn't receive it. 9% got interruptions during RT course. 10% of GP living >40 km away from the treatment center refused treatment. Mean time interval ...
Nanoscience and Nanotechnology Letters
ABSTRACT The use of microring resonators (MRRs) has shown promising applications in the microscal... more ABSTRACT The use of microring resonators (MRRs) has shown promising applications in the microscale regime. We propose a MRR interferometer system for optical spectroscopy use. Atom/photons are fed into the system by adding the dark soliton pulses, where the Gaussian beam with central wavelength of λ0 = 1.5 μm is inserted into the input port. The dark soliton-Gaussian beam collision results on generation of stable optical tweezer with FWHM, FSR and optical depth of 0.8 nm, 3.1 nm and 10.8 mW and potential well with FWHM, FSR and optical depth of 2 nm, 2.7 nm and 293 mW respectively. The output photons from the drop port pass through the object, interact with the surface and will be reflected back into the interferometer system. The collision process can be controlled within the control port, where the interference signal is observed at the through port. Here, the output power deviation from the through port when the target is not in contact with the system and when it interacts with the soliton pulses from the drop port can be determine and analyzed. Thus, a nano atom/photon trapping and transmission system can be implemented within the MRR interferometer system for optical spectroscopy and material's surface analysis. Copyright © 2013 American Scientific Publishers All rights reserved.
Quantum Matter
ABSTRACT We propose a system of microring resonator (MRR) incorporating with an add/drop filter s... more ABSTRACT We propose a system of microring resonator (MRR) incorporating with an add/drop filter system under nonlinearity condition where trapping of single and multi optical soliton can be simulated and used to many applications in optical switching and signal processing. Nonlinear Kerr effect type of the light inside the MRR induces the chaotic behavior within the device. By using appropriate soliton input power and MRR parameters, continuous spatial and temporal signals are generated spreading over the spectrum. In this work, narrow single and multi pulse of solitons can be trapped within the proposed system. There are two forms of localized soliton pulses as spatial and temporal in which required security can be performed via ultra-short pulses of soliton where the high capacity can be obtained using multiple trapping techniques. Results obtained show that single temporal and spatial soliton pulse of 4.8 picosecond (ps), 17.5 picometer (pm), 712 femtosecond (fs), 0.34 nanometer (nm) and 84 fs could be trapped where multi soliton pulses with FSR of 1.45 nm, 3.6 nanosecond (ns) and FWHM of 40 pm, 140 ps are localized within the add/drop filter system.
IOSR Journal of Applied Physics
IOSR Journal of Applied Physics
Microwave and Optical Technology Letters
IOSR Journal of Applied Physics
Journal of Biosensors & Bioelectronics
Journal of Fusion Energy
The Plasma Focus has wide-ranging applications due to its intense radiation of SXR, XR, electron ... more The Plasma Focus has wide-ranging applications due to its intense radiation of SXR, XR, electron and ion beams and fusion neutrons when operated in deuterium. The 5-phase Lee Model code has been developed for the focus operated in various gases including D, D-T, He, Ne, N, O, Ar, Kr and Xe. Radiation-coupled motion is included in the modelling. In this paper we look at the effect of radiation cooling and radiation collapse in krypton. The Pease-Braginskii current is that current flowing in a hydrogen pinch which is just large enough for the Bremsstrahlung to balance Joule heating. This radiationcooled threshold current for a hydrogen pinch is 1.6 MA. It is known that in gases undergoing line radiation strongly the radiation-cooled threshold current is considerably lowered. We show that the equations of the Lee Model code may be used to compute this lowering. The code also shows the effect of radiation cooling leading to radiative collapse. Numerical experiments based on experimentally fitted model parameters are run to demonstrate a regime in which radiation collapse is observed in Kr at a pinch current of 50-100 kA.
Quantum Matter
ABSTRACT This paper presents a technique of abnormal cell removal using ultra short pulses of opt... more ABSTRACT This paper presents a technique of abnormal cell removal using ultra short pulses of optical tweezers. This technique uses a Half Panda Ring Resonator (HPRR) made of nonlinear fiber optics to generate desired results, which are applicable to medical applications. This system consists of a centered ring resonator connected to smaller ring resonators on the left side which is a good candidate for nanoscale interferometer applications. The optical tweezers generated by the dark soliton propagating inside the system are in the form of potential wells. Optical tweezers can trap microscopic dielectric particles using radiation pressure of light. This technique has the unique ability to trap and manipulate molecules at the mesoscopic scale using molecular buffers. Optical tweezers with Full Width at Half Maximum (FWHM) of 3.58 nm interact with nano particles within the molecular buffer system, thus optical trapping occurs. Therefore the nano particles are used to be transmitted to a biological tissue in order to remove abnormal cells by direct collision, thus the collision of the particles will result in an exchange of energy and damage to the cells.
Quantum Matter
ABSTRACT A system of add/drop can be used as an interferometer system to generate nano bandwidth ... more ABSTRACT A system of add/drop can be used as an interferometer system to generate nano bandwidth of optical tweezers. Dark soliton-Gaussian control within the proposed system is analyzed. Optical tweezers have the unique ability to trap and manipulate particles at the mesoscopic scale. The proposed system can be applied to generate nano-sized bandwidth peaks of optical tweezers in the form of potential wells. The dynamic behavior of the tweezers occurred when the Gaussian laser pulse is added into the system. Here, tweezers with Full Width at Half Maximum (FWHM) of 12 nm could be generated. This technique is applicable for cellular surgery due to the precise setting and small diameter of the nano tweezers. Therefore, the interaction of the nano tweezers with injected gold nano particles contributes to transferring of heat to the abnormal cells leads to removal surgery process, thus tweezers can be used to selectively eliminate cellular components in individual cells.
Journal of Computational and Theoretical Nanoscience
Abstract Coupling of highly elliptical laser diode emission into single mode fiber using two sphe... more Abstract Coupling of highly elliptical laser diode emission into single mode fiber using two spherical ball lenses is investigated and the effectiveness of the mode matching with the circular mode field of the fiber is realized. Coupling efficiency is theoretically analyzed by employing ray and Gaussian beam optics. A 100% coupling efficiency is obtained at an optimum working distance of 3.5 mm. the coupling efficiency is found to be largely affected by the angular, lateral and transversal offsets. It can also be controlled significantly by ...