Transmission of data with orthogonal frequency division multiplexing technique for communication networks using GHz frequency band soliton carrier

Ahmad

Al-Khafaji

2015

AJNC

Abstract:In this paper, we propose a system of microring resonator (MRR). This system uses a laser diode input which can be incorporated with an optical add/drop filter system. When light from the laser diode feedbacks to the fiber ring resonator, the pulses in the form of soliton can be generated by using appropriate fiber ring resonator parameters and also the input power. The filtering process occurs during the propagation of the pulse within the ring resonators. The full width at half maximum (FWHM) or bandwidth characterization of the pulse can be performed using the proposed system. Results obtained have established particular possibilities from the application such as optical network communication. The obtained results show the effects of coupling coefficients and ring radius on the bandwidth of the soliton pulse, where the graph of the FWHM versus the variable parameters such as the radius and coupling coefficient are presented.

“…Here L and α are the waveguide length and linear absorption coefficient, respectively [37,38]. The input power insert into the input port of the add/drop filter system.…”

Section: Theory Of the Researchmentioning

confidence: 99%

Full Width at Half Maximum (FWHM) Analysis of Solitonic Pulse Applicable in Optical Network Communication

Ahmad

Al-Khafaji

2015

AJNC

“…One of the important parts of this device is an antenna. Using a small antenna with good performance is necessary, where to date, nano-antenna has become an interesting field in many applications such as communication and networks [44][45][46][47]. A novel nano-antenna system design is presented by Thammawongsa et al in which photonic spins in a PANDA ring resonator are employed.…”

Section: Ring Resonatorsmentioning

confidence: 99%

Optical Soliton Signals Propagation in Fiber Waveguides

Optical Soliton Communication Using Ultra-Short Pulses

Ahmad

2015

The first observation of soliton was done by Scott Russel and the first experimental observation of soliton was occurred by using microscope objectives. In 1970s, Hasegawa primed to realize that the NLS equation was appropriate for the calculation of pulse propagation in optical fibers. Microring resonators (MRRs) shaped from nanoscale photonic waveguides. Ring resonators are not used only in optical networks, but they have recently been presented to be used as sensors, filters and biosensors. Chaotic controls have been used in a great number of optical, engineering and biological designed systems. In applications, the stored ultra-short optical signal can be used to generate optical quantum memory. The ability of ultrashort optical soliton signal to synchronize in a communication system is valid. Multi soliton generation becomes an interesting subject when it is used to enlarge the capacity of communication channels.

“…The resonator output fields, E t1 and E 1 consist of the transmitted and circulated components within the add/drop optical filter system, given by [79][80][81] where κ 1 is the intensity coupling coefficient, γ 1 is the fractional coupler intensity loss, α is the attenuation coefficient, k n = 2π is the wave propagation number, is the input wavelength light field, L = 2πR ad and R ad is the radius of the add/drop system. For the second coupler of the add/drop system [82,83], E 0r and E 0L are the light fields circulated components of the nanoring radii and R r and R L are the coupled rings into the right and left sides of the add/drop optical filter system, respectively.…”

Section: Ring Resonator As Pandamentioning

confidence: 99%

Mathematics of Soliton Transmission in Optical Fiber

Ring Resonator Systems to Perform Optical Communication Enhancement Using Soliton

Afroozeh

2014

Ring resonators are suitable for many applications in micro and nano optical communication. Optical soliton is a self-reinforcing solitary wave that maintains its shape while it travels at constant speed. Optical solitons are seen by a cancellation of nonlinear and dispersive effects in the medium which can be a fiber optic. In a Kerr effect medium such as fiber optics, high intensity of light causes a phase delay having similar temporal shape as the intensity. This nonlinear phenomenon occurs for a beam called self-phase modulation (SPM), which is generated by its intensity. Optical Chaos occurs in many nonlinear optical systems. One of the most common examples is a ring resonator. Chaotic behavior has been considered as a nonlinear property in physics, electronics, and communication. When a high-intensity short pulse is coupled to optical fiber, the instantaneous phase of optical pulse rapidly changes through the optical Kerr effect. The SPM and cross-phase modulation (CPM) effects change the phase of the pulse as a function of its intensity. Here, we derive the soliton equations based on solving the nonlinear Schrodinger and Maxwell equations. The main performance characteristics of ring resonators are transmittance, free spectral range, finesse, Q-factor, and group delay, which have been demonstrated. Keywords Ring ResonatorsThe ring resonators are important devices in nanotechnology which are suitable for many applications in micro and nano optical communication. The nonlinear behaviors of light in a micro and nanoring resonator have been investigated and used for communication security. Moreover, the field buildup inside the ring cavity can be used for all optical signal processing functions based on enhanced nonlinear effects. Here the working principles of optical soliton propagating inside ring resonators are used. The novel concepts of ring resonator devices are given in this chapter.