Nonlinear behavior of light inside the microring resonator (MRR) show very interesting phenomena where the high capacity ranges can be obtained for long distance communication. Optical soliton is a self-reinforcing solitary wave that maintains its shape while it travels at constant speed. MRR can be an interesting tool to generate solitonic pulses needed in wireless communication systems. To make the proposed systems with practical device, the suitable parameters are used to adjust and provide the output results. Wireless networks have some advantage comparing with wire networks such as the cabling is not required and mobility services. OFDM is a widely used modulation and multiplexing technology.

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Reviews in Theoretical Science
Vol. 2, pp. 1–13, 2014
(www.aspbs.com/rits)
The Proposal of High Capacity GHz Soliton Carrier
Signals Applied for Wireless Communication
Nonlinear behavior of light inside the microring resonator (MRR) show very interesting phenomena where the
high capacity ranges can be obtained for long distance communication. Optical soliton is a self-reinforcing
solitary wave that maintains its shape while it travels at constant speed. MRR can be an interesting tool to
generate solitonic pulses needed in wireless communication systems. To make the proposed systems with
practical device, the suitable parameters are used to adjust and provide the output results. Wireless networks
have some advantage comparing with wire networks such as the cabling is not required and mobility services.
OFDM is a widely used modulation and multiplexing technology which has become the basis of many telecom-
munications standards for both wired and wireless communication networks. The basic principle of OFDM is
to split a high-rate data stream into a number of lower rate streams that are transmitted simultaneously over
a number of subcarriers. In this proposal we discuss the generating of carrier signals using soliton pulses for
OFDM modulation. The mathematical equation of the ring system is solved using the Z-transform method,
where the simulation of the result is handled by coding the equations using the MATLAB software licensed by
the Universiti Teknologi Malaysia (UTM).
KEYWORDS:
CONTENTS
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2. Operational Framework . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1. Phase-I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2. Phase-II . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3. Phase-III . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3. Theory of WDM Generation . . . . . . . . . . . . . . . . . . . . . . 8
4. Proposed System and Results . . . . . . . . . . . . . . . . . . . . . . 11
5. Future Works . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6. Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
References and Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
1. INTRODUCTION
A waveguide is defined as a structure which guides electro-
magnetic waves. Depending on the number of propagating
modes, different waveguide can be used. Differential
geometry of the waveguides can be used to confine energy
in one or two dimensions thus slab waveguide and fiber
can be used respectively. Usually different waveguides are
required to guide different frequencies. For the purpose
of optical frequency transmission, the used waveguide is
Author to whom correspondence should be addressed.
Email: isafiz@yahoo.com
Received: 6 May 2013
Accepted: 12 May 2013
typically optical fiber waveguides. An optical fiber is a
thin, flexible, transparent fiber that can be used as a waveg-
uide to transmit light along the length of the fiber. It is
suitable for guiding light of high frequency and is used
in wireless communications, which allows transmission of
signals over longer distances and at higher bandwidths
compared to other forms of communication. Nonlinear
behavior of the signals inside the ring resonators show very
interesting phenomena where the high capacity ranges can
be obtained for long distance communication.
Optical beam has a natural attraction to be diffracted
while it is propagated in a uniform medium. The beams
diffraction can be compensated by beam refraction when
the refractive index is increased. Optical waveguide is
a key way to present a balance between diffraction and
refraction if the medium is uniform with regards to the
direction of propagation. Therefore the outcome propaga-
tion of the light is controlled in the transverse direction
of the waveguide, and it is described by the concept of
spatially localization of the electric field in the waveguide.
Typically, an optical fiber consists of a transparent core
which is surrounded by a transparent cladding material
with a lower refractive index. Light is confined in the
core by total internal reflection so it acts as a waveg-
uide. Fibers which can be used for many propagation paths
Rev. Theor. Sci. 2014, Vol. 2, No. 4 2327-1515/2014/2/001/013 doi:10.1166/rits.2014.1027 1
1Institute of Advanced Photonics Science, Nanotechnology Research
Alliance,Universiti Teknologi Malaysia (UTM), 81310 Johor Bahru, Malaysia
2Faculty of Computing (FC), Universiti Teknologi Malaysia (UTM), 81300 Johor Bahru, Malaysia
Iraj Sadegh Amiri1∗, Ali Nikoukar2, Ali Shahidinejad2, and Toni Anwar2