New communication bands generated by using a soliton pulse within a resonator system

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University of Malaya (UM)

New communication bands generated by using a soliton pulse within a resonator system

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A novel system of multisoliton generation using nonlinear equations of the propagating signals is presented. This system uses a PANDA ring resonator incorporated with an add/drop filter system. Using resonant conditions, the intense optical fields known as multisolitons can be generated and propagated within a Kerr-type nonlinear medium. The present simulation results show that multisolitons can be controlled by using additional Gaussian pulses input into the add port of the PANDA system. For the soliton pulse in the microring device, a balance should be achieved between dispersion and nonlinear lengths. Chaotic output signals from the PANDA ring resonator are input into the add/drop filter system. Chaotic signals can be filtered by using the add/drop filter system, in which multi dark and bright solitons can be generated. In this work multi dark and bright solitons with an FWHM and an FSR of 425pm and 1.145 nm are generated, respectively, where the Gaussian pulse with a central wavelength of 1.55 μm and power of 600 mW is input into the system.

Simulation and Analysis of Multisoliton Generation Using a PANDA Ring Resonat...

University of Malaya (UM)

Ultra short multi soliton generation for application in long distance communi...

University of Malaya (UM)

Controlling center wavelength and free spectrum range by mrr radii

University of Malaya (UM)

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Chris Pfeiffer Sizler de belki bazılarını izlemişsinizdir, internette izlediğim gösterileri gerçekten akıl almaz. Mesela "115 derecelik tek teker nasıl olur?" diyorsanız mutlaka Chris'i izlemelisiniz. Motosiklet arkaya devrildi devrilecek derken Chris bir de elerini bırakıp izleyenlere el falan sallıyor, insanın tansiyonu düşüyor vallaha. Bir de çok meşhur numarası pistin ortasında duran bir kıza doğru motorunu hızla sürüyor. Aniden ön tekerleğin üstüne motorunu kaldırıp tam kızın önünde, arka teker havadayken uzanıp bir öpücük konduruyor. Almanya da birkaç kez kendisi ile konuştum... Küçük bir yarış yaptık kaybettim... Ana yolda Hız Limitini aşmadım Ama ona Hız limitini aştığından ceza kestim...:) Chris Pfeiffer bir Alman. Bayern 1970 doğumlu. İlk motosikletine binme yaşı bizde 30-40ları bulurken Chris 5 yaşında ikiteker üstündeymiş. 10 yaşına gelince ilk gösteri motosikletini almış ve bir motosikletin girebileceği her yere bununla gitmiş. Kısa zamanda "Almanya Minikler Trial Şampiyonu" olmuş.

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Simulation and Analysis of Multisoliton Generation Using a PANDA Ring Resonat...

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University of Malaya (UM)

In this paper, a novel system of simultaneous optical logic AND and OR gates using dark -bright soliton conversion within the add/drop optical filter system is proposed. The input logic „0‟ and control logic „0‟ are formed by using the dark soliton pulse (D) trains. By using the dark-bright soliton conversion behavior within the π/2 phase shift device, we found that the simultaneous optical logic AND and OR gates at the drop and through ports can be randomly formed, respectively.

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Characterisation of bifurcation and chaos in silicon microring resonator

University of Malaya (UM)

A system of microring resonator (MRR) is presented to generate extremely narrow optical tweezers. An add/drop filter system consisting of one centered ring and one smaller ring on the left side can be used to generate extremely narrow pulse of optical tweezers. Optical tweezers generated by the dark-Gaussian behavior propagate via the MRRs system, where the input Gaussian pulse controls the output signal at the drop port of the system. Here the output optical tweezers can be connected to a quantum signal processing system (receiver), where it can be used to generate high capacity quantum codes within series of MRR’s and an add/drop filter. Detection of the encoded signals known as quantum bits can be done by the receiver unit system. Generated entangled photon pair propagates via an optical communication link. Here, the result of optical tweezers with full width at half maximum (FWHM) of 0.3 nm, 0.8 nm and 1.6 nm, 1.3 nm are obtained at the through and drop ports of the system respectively. These results used to be transmitted through a quantum signal processor via an optical computer network communication link.

Generation of Quantum Photon Information Using Extremely Narrow Optical Tweez...

University of Malaya (UM)

Two systems consist of microring resonators (MRRs) and an add/drop filter are used to generate signals as localized multi wavelengths. Quantum dense encoding can be performed by output signals of selected wavelengths incorporated to a polarization control system. Therefore dark and bright optical soliton pulses with different time slot are generated. They can be converted into digital logic quantum codes using a decimal convertor system propagating along a wireless networks. Results show that multi soliton wavelength, ranged from 1.55 m to 1.56 m with FWHM and FSR of 10 pm and 600 pm can be generated respectively. Keywords- Micro Ring Resonator, Quantum Dense Coding (QDC), Wireless network communication system.

Decimal Convertor Application for Optical Wireless Communication by Generatin...

University of Malaya (UM)

We propose a system of microring resonators (MRRs) incorporating with an add/drop filter system. Optical soliton can be simulated and used to generate entangled photon, applicable in single and multiple optical switching. Chaotic signals can be generated via the MRRs system. Therefore continuous spatial and temporal signals are generated spreading over the spectrum. Polarized photons are formed incorporating the polarization control unit into the MRRs, which allows different time slot entangled photons to be randomly formed. Results show the single soliton pulse of 0.7 ps where the multi soliton pulse with FSR and FWHM of 0.6 ns and 20 ps are generated using the add/drop filter system. Here Ultra-short single soliton pulse with FWHM=42 fs can be simulated. These pulses are providing required communication signals to generate pair of polarization entangled photons among different time frame where the polarization control unit and polarizer beam splitter (PBS) are connected to the ring resonator system.

Cryptography Scheme of an Optical Switching System Using Pico/Femto Second So...

University of Malaya (UM)

Optical pulse trapping via a series of microring resonator (MRR) is presented. Large bandwidth of optical soliton is generated by input pulse propagating within the MRRs. Distinguished discrete wavelength or frequency pulses can be generated by using localized spatial pulses via a networks communication system. Quantum codes can be generated by using a polarization control unit and a beam splitter, incorporating to the MRRs. Here frequency band of 10.7 MHz and 16 MHz and wavelengths of 206.9 nm, 1448 nm, 2169 nm and 2489 nm are localized and obtained and used for quantum codes generation applicable for secured networks communication.

Frequency-Wavelength Trapping by Integrated Ring Resonators For Secured Netwo...

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Dark-Bright Solitons Conversion System for Secured and Long Distance Optical ...

University of Malaya (UM)

In this study an interesting system in which a bright and dark soliton pulse can be stopped inside a nonlinear waveguide is presented. Here, we propose a system consisting of a series of ring resonators for optical trapping within a nonlinear waveguide. The bright and dark solitons can be controlled and slowed down within the waveguide. The FWHM for the output signals are calculated and used as an optical memory. Bright and dark soliton behaviors within a micro and nano ring resonator are also investigated and described. The required pulse is filtered and amplified, can be controlled and localized within the system. The localized bright and dark solitons are stopped by controlling the input power,which means that the photon stopping can be controlled by light in a ring resonator.

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University of Malaya (UM)

We propose a novel system of the dynamic optical tweezers generated by a dark soliton in the fiber optic loop. A dark soliton known as an optical tweezer is amplified and tuned within the microring resonator (MRR) system. The required tunable tweezers with different widthsand powers can be controlled. The analysis of dark-bright soliton conversion using a dark soliton pulse propagating within a MRR is analyzed. The control dark soliton is input into the system via the add port of the add/drop filter. The dynamic behavior of the dark-brightsoliton conversion is observed. The required stable signal is obtained via a drop and throughput ports of the add/drop filter with some suitable parameters. In application, generation of optical tweezers and transportation can be realized by using the proposed system, where the communication network is performed.

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University of Malaya (UM)

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University of Malaya (UM)

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Controlling Nonlinear Behavior of a SMRR for Network System Engineering

University of Malaya (UM)

A system of microring resonators (MRRs) is presented to generation entangled photon. Different time slot for continuous variable quantum key distribution (CVQKD) use is applicable in optical wireless link. Chaotic behavior of a soliton pulse within the device can be presented respect to the Kerr nonlinear type of light in the MRR devices. Continuous spatial and temporal signals are generated spreading over the spectrum. The CVQKD is formed using the localized spatial soliton pulse. Here localized temporal soliton with FWHM and FSR of 0.2 ps and 0.58 ns is obtained respectively. The spatial soliton pulse has a FWHM of 80 pm. Transmission of soliton pulse with FWHM of 1.5 ps is simulated along the long distance fiber optics where the polarized photons are formed incorporating with the polarization control unit into the MRRs, which allows different time slot entangled photons to be randomly formed.

Long Distance Communication Using Localized Optical Soliton via Entangled Ph...

University of Malaya (UM)

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Optical Wired/Wireless Communication Using Soliton Optical Tweezers

University of Malaya (UM)

Generation of picometer optical soliton pulses is investigated using a nonlinear PANDA ring resonator system connecting to an add/drop filter system. The objectives of the research are to employ systems of microring resonator (MRR) to generate binary signals to be carried out along fiber optic communication. Effective parameters such as refractive indices of a silicon waveguide, coupling coefficients (), coupling loss, radius of the ring (R) and the input power can be selected properly to operate the nonlinear behavior. The input Gaussian laser pulses with power of 600 mW are inserted into the system. The central wavelength of the input power has been selected to λ0=1.55 µm where the nonlinear refractive index of the medium is n2=2.6×10−17 m2 W−1. Therefore binary signals generated by the add/drop filter system can be converted to secure codes where the decoding process of the transmitted codes can be obtained at the final step. Here, multi soliton pulses with full width at half maximum (FWHM) of 325 could be generated, converted to secure codes and finally detected over 70 km optical fiber communication link.

Ultra-short Multi Soliton Generation for Application in Long Distance Commun...

University of Malaya (UM)

In this paper, we propose a system for chaotic signal generation using a microring resonator (MRR) fiber optic system. This system uses a regular laserdiode as input power and can be incorporated with an optical add/drop filter system. When light from the laser diode feedbacks to the fiber ring resonator, the actual chaotic signal is produced by using the appropriate fiber ring resonator parameters and also the laser diode input power. The filtering process of the chaotic signals occurs during the round-trip of the pulse within the ring resonators. The single soliton pulses generation and bandwidth manipulation of the pulse can be performed using the add/drop system. Results obtained have established particular possibilities from the application. The obtained results show the effects of coupling coefficients on the bandwidth of the single soliton pulse, where the chaotic behaviors of the input pulses are presented.

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University of Malaya (UM)

The nonlinear behavior (chaotic) of light traveling in an optical fiber ring resonator such as an add/drop system is presented. The chaotic behavior is considered to be a beneficial effect that can be used in the communication system. Such a system can be used to secure the information signals, therefore, the ability of chaotic carriers to synchronize in a communication system is performed. The used optical material is InGaAsP/InP regarding to suitable parameters of the system. The nonlinear refractive index is fixed to n2 = 3.8 × 10−20 m2 /W, and the 20,000 iterations of round-trip within the system is simulated. The input powers are selected at 1 W, where the coupling coefficient of the system varies according to two critical cases, where 0    0.1 and 0.1  1. As a results, larger coupler coefficient corresponds to lower input power for the case of 0    0.1 and smaller coupling coefficient of the system is corresponds to lower input power when 0.1  1. To optimize the microring systems, Lower input power is recommended in many applications in optical optical communication systems.

NEW SYSTEM OF CHAOTIC SIGNAL GENERATION BASED ON COUPLING COEFFICIENTS APPLI...

University of Malaya (UM)

Chaotic soliton can be generated using a nonlinear PANDA system. The research uses microring resonator (MRR) to generate and trap chaotic signals along fiber optic communication. The parameters such as refractive indices of a silicon waveguide, coupling coefficients ( ), coupling loss, radius of the ring (R) and the input power can be selected properly to operate the nonlinear behavior. The input Gaussian laser pulses with power of 0.45 W are inserted into the system. The central wavelength of the input power has been selected to λ0=1.55 µm where the nonlinear refractive index of the medium is n2=1.3×10−17 m2 W−1 . The generated chaotic signals with Full at Half Maximum of 24 pm can be transmitted along the fiber optic with length of 195 km. The trapping of chaotic signals can be obtained at the end of the transmission link. Here signals with 600 fm bandwidth could be trapped within the system.

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University of Malaya (UM)

Nonlinear behaviors of light such as chaos can be observed during propagation of a Gaussian laser beam inside a single ring resonator system. Chaotic signals can be employed to generate data of logic codes to be transmitted along the fiber optic communication. Controlling of the chaotic signals can be implemented by the parameter of the system such as coupling coefficient, the ring’s radius, coupling loss and input power. The central wavelength of the input Gaussian laser pulse has been selected to λ0=1550 nm where the nonlinear refractive index of the medium is n2=1.4×10−13 m2 W−1. Therefore the data of logic codes generated by the single ring resonator system can be converted to transmitting secured codes where the decoding process of the transmitted codes can be obtained at the end of the transmission link. Here generation of logic code of “101010101011010101011101011110101101010101010110101” is performed, encoded and decoded over 50 km fiber optics. Thus secured transmitting of signals can be obtained along the long distance fiber communication.

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