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NANOSCALE SIGNAL PROCESSING FOR HYBRID COMPUTER COMMUNICATIONS
(2020-01-01)
Yupapin, Preecha
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Mitatha, Somsak
;
Ali, Jalil
Nanotechnology has been recognized as the interesting subject of research and investigation in either theory or experiment for a decade, where many research works and implementations have shown the significant growth and progress in many related technologies. Recently, the use of a small waveguide known as micro and/nanoring resonators has shown the potential of applications in many research areas, especially, in computer, communication and signal processing in the nanoscale regime. This new book presents the immerging techniques that can be merged into one particular subject, which is known as Nano Communications Networks. In applications, such devices, techniques or systems can be integrated and used for some particular applications.
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Analysis of temperature sensor in all-pass microring resonator
(2016-03-01)
Mohamad, Azam
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Bahadoran, Mahdi
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Daud, Suzairi
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Chaudhary, Kashif Tufail
;
Aziz, M. S.
The temperature sensor using all-pass microrin resonator (APMRR) investigated theoretically and analyzed. An optical bright soliton is used as a probe to study the effect of applied temperature on the light behavior pass through microring waveguide. The split-step Fourier method is used to study the pulse propagation inside the APMRR. Result shows that the rise of temperature on peak amplitude ratio fit with quadratic line in temperature range of 27 oC-37 oC. . The temperature at 30 oC generate higher slope of reduction compare to temperature at 36oC. The amplitude ratio is reduced into 0.6 (-4.4370 dB) when the temperature increased as small as 1 oC. The operating range for all-pass resonator is 97 oC with amplitude reduction of -8.3975 dB.
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Monitoring of traffic using unmanned aerial vehicle in malaysia landscape perspective
(2016-03-01)
Ahmad Noorden, Ahmad Fakhrurrazi
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Daud, Suzairi
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Haider Rizvi, Syed Zuhaib
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Ali, Jalil
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Yupapin, Preecha P.
The theoretical investigation has been performed on the implementation of optical Mobius shape in add-drop microring resonator. The modified add-drop Mobius configuration is used to investigate the optical bistability and the spectral transmission. The optical bright soliton pulse is used as the input source of the resonator system. The pulses propagation of the resonator system is modelled using the iterative programming based on the transfer matrix analysis equations. The enhancement of nonlinear effect of the resonator system is achieved by the add-drop Mobius resonator configuration. The system has been modelled for a variation of coupling coefficient for increase the bistable signal properties. The Add-drop Mobius MRR generated a bistable signal with 6.01 mW hysteresis width, and 9.47 mW output switch power with optimized radius of 5 μm outer and 4.5 m inner ring parts with 50 mW controlled power and input power. Mobius configuration is found as the better shape of resonator cavity that capable of optical switching application.
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Detection of Salmonella bacterium in drinking water using microring resonator
(2016-01-01)
Bahadoran, Mahdi
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Noorden, Ahmad Fakhrurrazi Ahmad
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Mohajer, Faeze Sadat
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Abd Mubin, Mohamad Helmi
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Chaudhary, Kashif
A new microring resonator system is proposed for the detection of the Salmonella bacterium in drinking water, which is made up of SiO<inf>2</inf>-TiO<inf>2</inf> waveguide embedded inside thin film layer of the flagellin. The change in refractive index due to the binding of the Salmonella bacterium with flagellin layer causes a shift in the output signal wavelength and the variation in through and drop port's intensities, which leads to the detection of Salmonella bacterium in drinking water. The sensitivity of proposed sensor for detecting of Salmonella bacterium in water solution is 149 nm/RIU and the limit of detection is 7 × 10-4RIU.
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Modified add-drop microring resonator for temperature sensing
(2015-10-01)
Mohamad, Azam
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Bahadoran, Mahdi
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Noorden, Ahmad Fakhrurrazi Ahmad
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Aziz, Safwan
;
Chaudhary, Kashif
A micro resonating sensor is proposed for simultaneous measurement of temperature and carrier density using modified Add-drop resonator called PANDA resonator from silicon-on-insulator (SOI) material waveguide. The proposed sensor works by observing the concentration of free-carrier in silicon around room temperature yielding the sensitivity of 1×1023 m-3 C-1 with limit of detection of 10-5 C. It is found that the output intensity decreases due to the photon and thermal absorptions. It is found that the performance of the PANDA sensor is affected by the power at the first coupling region and increase in propagating lengths of PANDA sensor causes a nonlinear effect in carrier density production.
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Rabi oscillation generation in the microring resonator system with double-series ring resonators
(2015-09-10)
Noorden, Ahmad Fakhrurrazi Ahmad
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Chaudhary, Kashif
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Bahadoran, Mahdi
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Aziz, Muhammad Safwan
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Jalil, Muhammad Arif
In this paper, a microring resonator (MRR) system using double-series ring resonators is proposed to generate and investigate the Rabi oscillations. The system is made up of silicon-on-insulator and attached to bus waveguide which is used as propagation and oscillation medium. The scattering matrix method is employed to determine the output signal intensity which acts as the input source between two-level Rabi oscillation states, where the increase of Rabi oscillation frequency with time is obtained at the resonant state. The population probability of the excited state is higher and unstable at the optical resonant state due to the nonlinear spontaneous emission process. The enhanced spontaneous emission can be managed by the atom (photon) excitation, which can be useful for atomic related sensors and single-photon source applications.
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Doppler shift velocimetry using two point probe nested-microring resonators
(2015-03-05)
Jomtarak, Rangsan
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Yupapin, Preecha P.
;
Ali, Jalil
In this paper, a micro Doppler shift velocimeter using two nested-microring resonators incorporating two gratings is designed and simulated. Two wavelength light pulse can be generated by a single input wavelength source after travelling through the two defect grating. Whispering gallery mode of light pulses are localized within the nested-microring resonators, which can be used to form the two point probe Doppler shift velocimeter. The shifted frequency (velocity) can be obtained by the difference of optical path length between two point probes, where the relative velocity of Doppler frequency shift velocimeter can be obtained. The light absorption behaviors can also be investigated by the different light output spectrum. The obtained simulation results shows that the relative velocities of the reflection and transmission light intensities are ranged from 104 m/s to 105 m/s, which can be useful for Doppler frequency shift velocimeter and sensors, where the micro-optical device and multi-functions are the advantages.
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Temperature effect on refractometric double ring resonator
(2015-01-01)
Mohamad, Azam
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Aziz, M. S.
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Bahadoran, Mahdi
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Chaudary, Kashif
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Arif Jalil, M.
The effect of temperature on double ring resonator (DRR) glucose sensing is investigate theoretically and proposed. Different from other optical resonator, the pulse laser is used as an input source and the vertical DRR configuration is used. The concept for pulse propagation is based on the split-step Fourier method. Result shows that the detection of glucose is measured by optical losses and the losses at 26°C are 1.86 dB at through and 0.93 dB at drop port, respectively. The performance of glucose sensing on DRR is degraded by temperature. Effect of temperature creates more losses which results total loss of 2.01 dB at through and 1 dB at drop port when temperature increase by 1°C.
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All-optical hysteresis switching using mobius configuration microring resonator circuit
(2015-01-01)
Noorden, Ahmad Fakhrurrazi Ahmad
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Mohamad, Azam
;
Bahadoran, Mahdi
;
Chaudhary, Kashif
;
Aziz, M. S.
The novel twisted ring resonator called add-drop Mobius microring resonator is introduced and modelled with the analytical solution of transfer matrix methods for the generation of optical bistability. Simulated results show that, the add-drop Mobius configuration provides greater phase shift due to the longer length of propagation per roundtrip than add-drop filter configuration. In add-drop Mobius system, drop port generated the optical bistable hysteresis loop with 19.25 mW output switching power and through port generated lower switching power as 5.55 mW. The drop port of the system is found as the suitable port for the operating the all-optical hysteresis switching.
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Effect temperature in chemical sensing using triple stage microring resonator
(2015-01-01)
Mohamad, Azam
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Bahadoran, Mahdi
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Aziz, Safwan
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Chaudary, Kashif
;
Jalil, Muhammad Arif
The split-step Fourier technique is used to study the effect of temperature in triple stage microring resonating sensor (TSMRRS). The optical bright soliton beam is used as the probe pulse into the TSMRRS and the effect of temperature variations on various concentrations of glucose in deionize water is investigated. The detection of glucose is measured by intensity variations of output signals from through and drop ports of TSMRRS. The temperature variations cause an exact intensity reduction of glucose concentration in deionize water when the temperature increased by 1 °C. The performance of TSMRRS glucose sensor is improved for temperature range similar with standard room temperature which shows that TSMRRS is suitable candidate for chemical sensing application.

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