Multi Soliton Generation for Enhance Optical Communication

2011 ◽  
Vol 83 ◽  
pp. 136-140 ◽  
Author(s):  
Abdolkarim Afroozeh ◽  
Iraj Sadegh Amiri ◽  
Muhammad Arif Jalil ◽  
Mojgan Kouhnavard ◽  
Jalil Ali ◽  
...  
Keyword(s):  
Wavelength Division Multiplexing ◽  
Ring Resonators ◽  
Long Distance ◽  
Wavelength Division ◽  
Large Bandwidth ◽  
Soliton Pulse ◽  
Free Spectrum ◽  
Distance Communication ◽  
Temporal Modes ◽  
Soliton Generation

We propose a new optical system that can be used to form the multi-soliton pulses within the micro-ring resonators. The system consists of two micro-ring resonators and an add/drop multiplexer that can be integrated into a single system. The large bandwidth signal is generated by using a soliton pulse propagating in a Kerr-type nonlinear medium. The tuned soliton pulses in either spatial or temporal modes are obtained by using the add/drop multiplexer. Results show the generation of multi-soliton pulses within the micro-ring resonator can be achieved for long distance communication. This results in an increase in the number of channels and spaces with a large free spectrum range (FSR) of 650 pm for dense wavelength division multiplexing (DWDM).

Investigation the Effect of Channel Spacing for Long Distance Communication

2019 ◽  
Vol 2 (1) ◽  
pp. 45-47
Author(s):  
Mamta Janagal ◽  
Gurpreet Kaur ◽  
Varinder Mandley ◽  
Tanvi Sood
Keyword(s):  
Wavelength Division Multiplexing ◽  
Optical Gain ◽  
Input Power ◽  
Long Distance ◽  
Channel Spacing ◽  
Wavelength Division ◽  
Received Power ◽  
Signal Input ◽  
Distance Communication ◽  
The Impact

In this paper, the impact of different channel spacing on proposed system setup is investigated for long distance communication. This wavelength division multiplexing (WDM), dense wavelength division multiplexing (DWDM) and ultradense wavelength division multiplexing (UDWDM) is evaluated by considering the signal quality factor, bit error rate, optical gain, and received power for different signal input power and for distance. It is observed that at -5 dBm of signal input power the system covers 130 km with acceptable BER (10-8) and Q-factor (14dB).

scholarly journals Study of Optical Fiber Design Parameters in Fiber Optics Communications

2017 ◽  
Vol 2 (3) ◽  
pp. 302-308 ◽  
Author(s):  
Salim Qadir Mohammed ◽  
Asaad M. Asaad M. Al-Hindawi
Keyword(s):  
Optical Fiber ◽  
Fiber Optics ◽  
Numerical Aperture ◽  
Design Parameters ◽  
Light Sources ◽  
Long Distance ◽  
Graded Index ◽  
Large Bandwidth ◽  
Telecommunication Infrastructure ◽  
Distance Communication

Fiber optics is an important part in the telecommunication infrastructure. Large bandwidth and low attenuation are features for the fiber optics to provide gigabit transmission. Nowadays, fiber optics are used widely in long distance communication and networking to provide the required information traffic for multimedia applications. In this paper, the optical fiber structure and the operation mechanism for multimode and single modes are analyzed. The design parameters such as core radius, numerical aperture, attenuation, dispersion and information capacity for step index and graded index fibers are studied, calculated and compared for different light sources.

scholarly journals Opto-Mechatronics System for Train-Track Micro Deformation Sensing

Sensors ◽  
2021 ◽  
Vol 22 (1) ◽  
pp. 296
Author(s):  
Weibing Gan ◽  
Shiyu Tu ◽  
Yuan Tao ◽  
Lingyun Ai ◽  
Cui Zhang ◽  
...  
Keyword(s):  
Wavelength Division Multiplexing ◽  
Large Scale ◽  
Time Domain Reflectometry ◽  
Wavelength Shift ◽  
Train Track ◽  
Long Distance ◽  
Wavelength Division ◽  
Track System ◽  
Signal Demodulation ◽  
Micro Deformation

In this paper, we proposed and experimentally demonstrated an opto-mechatronics system to detect the micro-deformation of tracks caused by running trains. The fiber Bragg grating (FBG) array acting as sensing elements has a low peak reflectivity of around −40 dB. The center wavelengths were designed to alternate between 1551 nm and 1553 nm at 25 °C. Based on dual-wavelength, wavelength-division multiplexing (WDM)/time-division multiplexing (TDM) hybrid networking, we adopted optical time-domain reflectometry (OTDR) technology and a wavelength-scanning interrogation method to achieve FBG array signal demodulation. The field experimental results showed that the average wavelength shift of the FBG array caused by the passage of the lightest rail vehicle was −225 pm. Characteristics of the train-track system, such as track occupancy, train length, number of wheels, train speed, direction, and loading can be accurately obtained in real time. This opto-mechatronics system can meet the requirements of 600 mm spatial resolution, long distance, and large capacity for monitoring the train-track system. This method exhibits great potential for applications in large-scale train-track monitoring, which is meaningful for the safe operation of rail transport.

Application of Photonic Crystal Ring Resonators for Realizing All Optical Demultiplexers

Frequenz ◽  
2018 ◽  
Vol 72 (9-10) ◽  
pp. 465-470 ◽  
Author(s):  
Somaye Serajmohammadi ◽  
Hamed Alipour-Banaei ◽  
Farhad Mehdizadeh
Keyword(s):  
Photonic Crystal ◽  
Wavelength Division Multiplexing ◽  
Resonance Wavelength ◽  
Transmission Efficiency ◽  
Ring Resonators ◽  
Channel Spacing ◽  
Wavelength Division ◽  
All Optical ◽  
Core Section ◽  
Ring Core

Abstract Transmission efficiency, quality factor, crosstalk levels and number of output channels are the most crucial parameters in designing optical demultiplexers, suitable for wavelength division multiplexing applications. In this paper we proposed an 8-channel optical demultiplexer based on photonic crystal ring resonator. For performing wavelength selection task we used eight ring resonators. The resonance wavelength of the ring resonators depends on the dimensions of the ring core, therefore we choose eight different values for the lattice constant of the ring resonators core section. The average channel spacing of the structure is about 3 nm the transmission efficiency in most of the channels is equal or more than 99 % except in one channels whose transmission efficiency is 85 %.

scholarly journals An Eight-Channel C-Band Demux Based on Multicore Photonic Crystal Fiber

Nanomaterials ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 845 ◽  
Author(s):  
Dror Malka ◽  
Gilad Katz
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Wavelength Division Multiplexing ◽  
Light Propagation ◽  
Beam Propagation Method ◽  
Geometrical Parameters ◽  
Wavelength Division ◽  
Crystal Fiber ◽  
Large Bandwidth ◽  
Air Hole

A novel eight-channel demux device based on multicore photonic crystal fiber (PCF) structures that operate in the C-band range (1530–1565 nm) has been demonstrated. The PCF demux design is based on replacing some air-hole areas with lithium niobate and silicon nitride materials over the PCF axis alongside with the appropriate optimizations of the PCF structure. The beam propagation method (BPM) combined with Matlab codes was used to model the demux device and optimize the geometrical parameters of the PCF structure. The simulation results showed that the eight-channel demux can be demultiplexing after light propagation of 5 cm with a large bandwidth (4.03–4.69 nm) and cross-talk (−16.88 to −15.93 dB). Thus, the proposed device has great potential to be integrated into dense wavelength division multiplexing (DWDM) technology for increasing performances in networking systems.

Multi Wavelength Generated by PANDA Ring Resonator for Multi User DWDM WiMAX Network

2014 ◽  
Vol 979 ◽  
pp. 471-478
Author(s):  
S. Songmuang ◽  
S. Sappajak ◽  
N. Thammawongsa ◽  
N. Pornsuwancharoen ◽  
P.P. Yupapin
Keyword(s):  
Wavelength Division Multiplexing ◽  
Ring Resonator ◽  
Bright Soliton ◽  
Wavelength Division ◽  
Network Applications ◽  
Nonlinear Resonator ◽  
Multi Wavelength ◽  
Planar Lightwave ◽  
Soliton Generation ◽  
Wimax Network

This paper proposed a scheme for multi channels THz frequency generation by using a coupled nonlinear resonator device known as PANDA ring. Dipole gold nanoantenna coupled to active plasmonic devices was used at THz for WiMAX network applications. Multiple Dark-Bright soliton conversion control propagating within a modified PANDA ring resonator to generated dense wavelength division multiplexing (DWDM).The system results illustrated multi wavelength Dark-Bright soliton generation and the frequency obtained in multi THz frequency to broadcast the data to transmitter for all receivers. In this approach, the muti THz frequency provides a reliable frequency band for the future planar lightwave circuit (PLCs) based on DWDM optical link with Wi-Fi, WiMAX, Ubiquitous, and many applications.

Loss-Less Elliptical Channel Drop Filter for WDM Applications

2019 ◽  
Vol 40 (4) ◽  
pp. 379-384 ◽  
Author(s):  
S. Naghizade ◽  
S. M. Sattari-Esfahlan
Keyword(s):  
Integrated Circuits ◽  
Wavelength Division Multiplexing ◽  
Optical Filter ◽  
Resonance Wavelength ◽  
Transmission Efficiency ◽  
Ring Resonators ◽  
Physical Parameters ◽  
Wavelength Division ◽  
Filter Performance ◽  
Two Parameters

Abstract In this paper, we proposed optical filter based on two-dimensional photonic crystal elliptical channel for wavelength division multiplexing. We employed ring resonator with ellipse shaped core in proposed structure. The resonance wavelength of the ring resonators depends on two parameters: refractive index and radius of dielectric rods. We investigate the physical parameters governing the filter performance. Our results show that the transmission efficiency is 100 % due to nearly zero reflection and loss in channel. Band width of 4 nm and quality factor of 389 is obtained for filter. Also, the total footprint of proposed structure is 230.4 µm2 which makes it suitable for all optical integrated circuits.

Mode-selective coupler for wavelength multiplexing using LiNbO3:Ti optical waveguides

Open Physics ◽  
2008 ◽  
Vol 6 (3) ◽  
Author(s):  
Daniel Runde ◽  
Stefan Breuer ◽  
Detlef Kip
Keyword(s):  
Lithium Niobate ◽  
Wavelength Division Multiplexing ◽  
Optical Waveguides ◽  
Directional Coupler ◽  
Optical Network ◽  
Single Mode ◽  
Network Nodes ◽  
Wavelength Division ◽  
Large Bandwidth ◽  
Channel Waveguides

AbstractA mode-selective directional coupler based on titanium in-diffused channel waveguides in lithium niobate is investigated. This coupler may be utilized as a key part of an add-drop multiplexer for dense wavelength division multiplexing in optical network nodes. The proposed coupler is based on evanescent coupling of the fundamental mode of a single-mode channel to the first higher mode of a parallel bi-modal waveguide. Our experimental results show that a compact directional coupler with coupling efficiencies larger than 90%, large bandwidth around 1550 nm, and with negligible polarization dependence can be realized using electro-optic lithium niobate substrates.

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