Wavelength division multiplexing developed with optimum length-based EDFA in the presence of dispersion-compensated fiber system

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Mahmoud M. A. Eid ◽  
Shimaa El-Meadawy ◽  
Abd El-Naser A. Mohammed ◽  
Ahmed Nabih Zaki Rashed
Keyword(s):  
Wavelength Division Multiplexing ◽  
Single Mode ◽  
Fiber Amplifier ◽  
Effective Area ◽  
Single Mode Fiber ◽  
Error Rates ◽  
Fiber System ◽  
Optimum Length ◽  
Erbium Doped Fiber Amplifier ◽  
Highly Nonlinear

Abstract This work outlines 80-channel wavelength multiplexing that has been developed with optimum length-based erbium-doped fiber amplifier (EDFA) with dispersion-compensated fiber. This paper has presented different fiber mediums with different effective areas such as single mode fiber (SMF), highly nonlinear fiber (HNLF), highly nonlinear dispersion-flattened fiber (HNL-DFF), nonreturn to zero dispersion-shifted fiber (NRZDSF) and a two types of large effective area fiber (LEAF Step core and LEAF Ring core) with dispersion-compensated fiber and EDFA amplification. Optimum fiber length can be obtained using minimum and maximum bit error rates with channels number and bit rate variations.

40  Gb/s DWDM Structure with Optical Phase Configuration for Long-Haul Transmission System

2017 ◽  
Vol 38 (1) ◽  
Author(s):  
Hsiu-Sheng Lin ◽  
Po-Chou Lai
Keyword(s):  
Wavelength Division Multiplexing ◽  
Phase Conjugation ◽  
Dispersion Compensation ◽  
Single Mode ◽  
Fiber Amplifier ◽  
Single Mode Fiber ◽  
Erbium Doped Fiber Amplifier ◽  
Differential Phase Shift ◽  
Optical Phase ◽  
Dwdm System

AbstractWe propose the experimental transport of 48 channels with 40 Gbit/s dense wavelength-division multiplexing (DWDM) system that uses single-mode fiber (SMF) in combination with dispersion compensation fiber (DCF) which is a dispersion compensation device, in C and L band wavelength range to solve the dispersion program. The DWDM system scheme employing single Mach–Zehnder modulation (MZM) return-to-zero differential phase-shift keying (RZ-DPSK) modulation format with hybrid Raman/EDFA (Erbium-doped fiber amplifier) configuration to improve transmission signal, and employing an optical phase conjugation (OPC) configuration in the middle line. That can compensate for dispersion impairment and improve nonlinear effects to investigate transmission distance performances.

scholarly journals Enhanced Spectral Amplitude Coding OCDMA System Utilizing a Single Photodiode Detection

2018 ◽  
Vol 8 (10) ◽  
pp. 1861 ◽  
Author(s):  
Somia Abd El-Mottaleb ◽  
Heba Fayed ◽  
Ahmed Abd El-Aziz ◽  
Mohamed Metawee ◽  
Moustafa Aly
Keyword(s):  
System Performance ◽  
Multiple Access ◽  
Group Velocity Dispersion ◽  
Single Mode ◽  
Fiber Amplifier ◽  
Single Mode Fiber ◽  
Spectral Amplitude ◽  
Erbium Doped Fiber Amplifier ◽  
Spectral Amplitude Coding ◽  
Code Division Multiple

In this paper, the performance of a spectral amplitude coding-optical code division multiple access (SAC-OCDMA) system is investigated utilizing a single photodiode (SPD) detection technique. The proposed system uses enhanced double weight (EDW) codes as signature codes with three simultaneous users to overcome both phase-induced intensity noise (PIIN) and multiple access interference (MAI). In addition, a dispersion compensating fiber (DCF) is used in order to decrease the group velocity dispersion (GVD) caused in the single mode fiber. An erbium-doped fiber amplifier (EDFA) is used to overcome the attenuation. The use of both DCF and EDFA leads to an appreciable enhancement in the system performance. The system performance is evaluated through its bit error rate (BER), Q-factor, and received power. A comparison between the EDW codes and modified double weight (MDW) codes on the SAC-OCDMA system is demonstrated. Simulation is carried out through Optisystem ver. 7. The simulation results show that: (a) using an avalanche photodiode (APD) over PIN photodiode allows data transmission over longer distances; (b) the use of DCF improves the system BER;(c) using MDW codes gives better BER than using EDW codes.

DWDM Transmission with LEAF and RDF Structure in 40 Gb/s Single MZM with RZ-DPSK Modulation

2017 ◽  
Vol 38 (1) ◽  
Author(s):  
Hsiu-Sheng Lin ◽  
Po-Chou Lai
Keyword(s):  
Wavelength Division Multiplexing ◽  
Dispersion Compensation ◽  
Fiber Amplifier ◽  
Effective Area ◽  
Erbium Doped Fiber Amplifier ◽  
Differential Phase Shift ◽  
Wavelength Division ◽  
Modulation Format ◽  
Shift Keying ◽  
Dwdm System

AbstractWe propose the experiment transport of 48 Chs 40 Gb/s dense wavelength division multiplexing (DWDM) system that uses larger effective area fiber (LEAF) in combination with reverse dispersion fiber (RDF), which is a dispersion compensation device, in C band (1,530–1,560 nm) and L band (1,570–1,610 nm) wavelength range to solve the dispersion program. The single Mach–Zehnder modulation (MZM) format with erbium-doped fiber amplifier (EDFA) configuration to generate return-to-zero differential phase-shift keying (RZ-DPSK) modulation signal can compensate dispersion impairment in 48×40 Gb/s DWDM system. The proposed 48×40 Gb/s DWDM system successfully employs single MZM RZ-DPSK modulation format to reduce modulation complex configuration with EDFA to promote the power signal and using LEAF and RDF in 28 spans over 3,360 km ultra-long-haul fiber transmission successfully.

scholarly journals Extinction Ratio and the Fiber Optic Transmission Networks

2021 ◽  
Vol 12 (6) ◽  
pp. 2244-2252
Author(s):  
Ved Nath Jha, Supriya Rani, Ved Nath Jha
Keyword(s):  
Optical Fiber ◽  
Fiber Optic ◽  
Optical Network ◽  
Extinction Ratio ◽  
Wavelength Division Multiplex ◽  
Single Mode ◽  
Fiber Amplifier ◽  
Single Mode Fiber ◽  
Erbium Doped Fiber Amplifier ◽  
Fiber Network

In the fiber optic communication network for example,- FTTH, EPON, NBN, OTN and so on, the most important components are fiber length between transmitter and receiver point. So, to make, cheap and meaningful communication through optical fiber it must be required to calculate how and what amount of signal is transmitted with the given length of the fiber. Finally, it is said that the optical fiber network have several limitations like extension ratio. So, it is necessary to investigate its affect on the performance of the Optical Network. This research is based on simulation by OptiSystem 0.17 on the basis of Dense wavelength division multiplex (DWDM) technology, Erbium Doped Fiber Amplifier (EDFA), dispersion Compensating Fiber (DCF) and single mode fiber of length 50–100 km.

scholarly journals Simulated Performance Analysis of an Optical Frequency Comb in a WDM System

2017 ◽  
Vol 16 (1) ◽  
pp. 53-60
Author(s):  
Rifat Nazneen ◽  
Ebad Zahir
Keyword(s):  
Wavelength Division Multiplexing ◽  
Frequency Comb ◽  
Research Work ◽  
Fiber Amplifier ◽  
Channel Length ◽  
Optical Frequency Comb ◽  
Critical Parameters ◽  
Optical Frequency ◽  
Erbium Doped Fiber Amplifier ◽  
Highly Nonlinear

This paper presents the research work for a proposed novel scheme for generating a flat and equally spaced optical frequency comb using a simulated layout using Optisystem. Three pump sources at 1 nm wavelength apart are injected along with a 25 GHz RF signal having different amplitudes into a cascade of Dual-Drive Mach-Zehnder Modulator and Electro-Absorption Modulator and multiple highly nonlinear fiber loops. The initial scheme is using Four Wave - Mixing and yields a comb of 27 lines with uneven gain and a 6 dBm power deviation. After characterizing the response by exploring critical parameters such as pump power, frequency spacing, dispersion effect, Erbium Doped Fiber Amplifier and DC bias of the modulators, the researchers were able to reduce the power deviation down to 2 dBm at the expense of some comb lines. This final optimized scheme was then evaluated for a preliminary Wavelength Division Multiplexing setup having only five channels/modes at 10 Gb/s for a channel length of 1 km. Each of the received de-multiplexed channels was evaluated through recorded data in the form of Bit Error Rate and Quality-factor and the final results are shown to be quite promising.

Radio-Over-Fiber Dual-Parallel Mach-Zehnder Modulator System for Photonic Generation of Millimeter-Wave Signals Through Two Stages

2021 ◽  
Author(s):  
Fabio Barros de Sousa ◽  
Fiterlinge M. de Sousa ◽  
Igor R. S. Miranda ◽  
Waldomiro Paschoal ◽  
Marcos B. C. Costa
Keyword(s):  
Millimeter Wave ◽  
Transmission Rate ◽  
Access Network ◽  
Single Mode ◽  
Fiber Amplifier ◽  
Single Mode Fiber ◽  
Radio Over Fiber ◽  
Base Stations ◽  
Erbium Doped Fiber Amplifier ◽  
Mach Zehnder Modulator

Abstract In this work, we presented a radio-over-fiber (ROF) access network through two modulation stages for the generation of multiple millimeter wave (mm-wave) signals with frequencies of 20GHz, 40GHz, 60GHz and 80 GHz for the transmission rate of 10 Gbps as a function of the variation of link distance and signal power. The specific purpose of the paper was to design and to investigate a RoF system based on the variation of mm-wave frequencies in order to implement a simple and effective system. In stage 1, there are two modulators in parallel (MZMa and MZMb) called dual-parallel Mach-Zehnder modulator (DP-MZM) and in stage 2 there is only one modulator (MZMc), connected to three pulse generators: Non-Return-to-Zero (NRZ), Return-to-Zero (RZ). A single-mode fiber (SMF) and Gaussian and an erbium-doped fiber amplifier (EDFA) were also used to send signals to base stations (BSs). The numerical analyzes of the results of the eye diagrams showed excellent bit error rate (BER) and quality factor (Q-factor) values, which proved the good performance of the proposed ROF DP-MZM system, for the three encoding formats used, which was able to generate 3-tupling mm-wave for multiple wireless accesses.

Study on Structure Optimization of Multi-Wavelength Brillouin-Erbium Doped Fiber Laser

2013 ◽  
Vol 734-737 ◽  
pp. 2792-2795
Author(s):  
Xue Fang Zhou ◽  
Shan Yuan
Keyword(s):  
Pump Power ◽  
Fiber Laser ◽  
Ring Cavity ◽  
Single Mode ◽  
Fiber Amplifier ◽  
Single Mode Fiber ◽  
Erbium Doped Fiber Amplifier ◽  
Erbium Doped ◽  
Access Mode ◽  
Multi Wavelength

A ring cavity multiwavelength Brillouin erbium-doped optical fiber laser （EDFL）based on the stimulated brillouin scattering effects and linear gain mechanism of erbium-doped fiber was demonstrated, in which single mode fiber was used as Brillouin gain medium and the Stokes signal was amplified by using the erbium-doped fiber amplifier, so that the laser can produce a stable multi-wavelength output at room temperature. Through the study and analysis of the position of the circular and coupler and the access mode of the coupler, we found that they both had influence on the output of the brillouin-erbium fiber laser. Then we have done some experiments at the Brillouin pump power of 14 dBm and the 980 nm pump power of 23 dBm, and single mode fiber length of 10km. The results showed that the access mode of the coupler affects the output of the brillouin-erbium fiber laser obviously. The detailed test results and the corresponding explanation were given.

scholarly journals Improvements on the performance of subcarrier multiplexing/wavelength division multiplexing based radio over fiber system

2021 ◽  
Vol 11 (2) ◽  
pp. 1439
Author(s):  
Duc-Tan Tran ◽  
Ninh Trung Bui
Keyword(s):  
Wavelength Division Multiplexing ◽  
Communication Systems ◽  
Phase Shifter ◽  
Fiber Amplifier ◽  
Radio Over Fiber ◽  
Fiber System ◽  
Channel Spacing ◽  
Erbium Doped Fiber Amplifier ◽  
Wavelength Division ◽  
Subcarrier Multiplexing

Radio over fiber (RoF) techniques are good candidates to create the backbone of the next generation of wireless networks. Many parameters affect RoF communications such as amplified spontaneous emission noise (ASE), four-wave mixing nonlinearity (FWM), the modulation, channel spacing, switching voltage, and phase shifter. In this paper, we propose an improved model of RoF communication systems using subcarrier multiplexing/wavelength division multiplexing (SCM/WDM) technique with unequal channel spacing and 1-km Erbium-doped fiber amplifier (EDFA). Simulation results confirmed that we could obtain the lowest bit error rate and noises when the EDFA is placed at 1 km from the transmitter by using optical single-sideband (OSSB) modulation at frequencies 193.1 THz, 193.2 THz, 193.35 THz, and 193.6 THz.

scholarly journals Impact of encryption and decryption techniques for high speed optical domain

2021 ◽  
Vol 2 (1) ◽  
pp. 11-15
Author(s):  
Rishabh Singh ◽  
Ghanendra Kumar ◽  
Chakresh Kumar
Keyword(s):  
Data Transmission ◽  
High Speed ◽  
Single Mode ◽  
Fiber Amplifier ◽  
Single Mode Fiber ◽  
Erbium Doped Fiber Amplifier ◽  
Raman Amplifier ◽  
Optical Circuit ◽  
Encryption And Decryption ◽  
Secured Data

This project proposes the design of ultrafast communication circuit which can enable the high speed secured data transmission at 50 Gb/s and 100 Gb/s by the use of distributed Raman amplifier, EDFA (Erbium – doped fiber amplifier), filter, single mode fiber along with Fiber Bragg Grating (FBG) and attenuators. The simulation of the suggested optical circuit involves the use of parameters of Raman amplifier and EDFA and other components included in the optical structure. The design also includes the use of encryption and decryption techniques to ensure secured communication. Thus, realization of these circuits at 50 Gb/s and 100 Gb/s will enable the future optical communication applications for ultrafast data transmission to large distances.

scholarly journals Symmetric-type dispersion maps in dispersion-managed optical link with mid-span spectral inversion

2020 ◽  
Vol 20 (1) ◽  
pp. 222
Author(s):  
Jea-Pil Chung ◽  
Seong-Real Lee
Keyword(s):  
Communication Systems ◽  
Group Velocity Dispersion ◽  
Phase Conjugation ◽  
Single Mode ◽  
Fiber Amplifier ◽  
Single Mode Fiber ◽  
Erbium Doped Fiber Amplifier ◽  
Optical Link ◽  
Optical Phase ◽  
Wavelength Division

In long-haul optical communication systems consisting of single-mode fiber spans and fiber amplifiers, such as an erbium-doped fiber amplifier, signal distortion causes performance to deteriorate because of group velocity dispersion and fiber nonlinearity. A combination of dispersion management and optical phase conjugation is an effective technique of compensating for the distortion. In an optical link configured with this combination, the dispersion map mainly affects the compensation for the distorted optical signals. Improvements in system performance have been reported for various types of dispersion maps. In this study, a symmetric type of dispersion map with respect to the midway optical phase conjugator is proposed. The effect of the proposed dispersion maps on the compensation for the distorted 24 channel × 40 Gbps wavelength-division-multiplexed signals was assessed through numerical simulation. It was confirmed that antipodal-type dispersion maps are most appropriate for the compensation, as well as for the flexibility of the link configuration.

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