scholarly journals Influence of ASE Noise on Performance of DWDM Networks Using Low-power Pumped Raman Amplifiers

2015 ◽  
Vol 25 (2) ◽  
pp. 147
Author(s):  
Bui Trung Ninh ◽  
Nguyen Quoc Tuan ◽  
Ta Viet Hung ◽  
Nguyen The Anh ◽  
Pham Van Hoi
Keyword(s):  
Low Power ◽  
Wavelength Division Multiplexing ◽  
Bit Error Rate ◽  
Error Rate ◽  
Network Performance ◽  
Noise Figure ◽  
Chromatic Dispersion ◽  
Low Noise ◽  
Wavelength Division ◽  
Raman Amplifiers

We present the results of investigation  for  influence of amplified spontaneous emission (ASE) noise, noise figure (NF) and  chromatic dispersion on the performance of middle-distance Dense-wavelength-division-multiplexing (DWDM) networks using low-power pumped distributed Raman amplifiers (DRAs) in two different pump configurations, i.e., forward and backward pumping. We found that the pumping configurations, ASE noise, and dispersion play an important role for improving network performance by decrease of noise figure and bit error rate (BER) of the system. Simulation results show that the lowest bit error rate and low noise figure were obtained, when using forward pumping configuration. Moreover, we have also compared ASE noise powers of the simulation with these of the experiment. These results conclude that DRA with low pump power  ($<1$~W) is the promising key technology for short-- and/or middle-distance DWDM transmission networks.

scholarly journals Modified Unequally Spaced Channels Wavelength Division Multiplexing System

2008 ◽  
pp. 68-78
Keyword(s):  
Wavelength Division Multiplexing ◽  
Bit Error Rate ◽  
Error Rate ◽  
Four Wave Mixing ◽  
The Other ◽  
Wave Mixing ◽  
Wavelength Division ◽  
Unequally Spaced ◽  
Frequency Spacing ◽  
Active Channels

The channels contributed in creating new pulse during the four-wave mixing (FWM) process are a subject of two features: the first is the fact that all channels are not working with probability %100 , but with p probability. Second, the bits transmitted are not all "1". Therefore, the equation of power generated using these features should be corrected. On the other hand, the use of equally spaced channels wavelength divisionmultiplexing (ESC WDM) system cause an increase in the number of new components generated that interfere with the active channels and increase the bit error rate. In order to reduce these interferences, we have provided an unequally spaced channels wavelength division-multiplexing (USC WDM) system composed of several sets. Each set consists of only four channels, which locations have been selected to cause no interferences between them. Neighboring sets are separated by a frequency spacing which should be large enough to reduce the interferences between the sets, andsmall enough to increase the total number of channels of the system.

HỆ THỐNG PHÂN PHỐI KHÓA LƯỢNG TỬ ĐA KÊNH TỪ VỆ TINH SỬ DỤNG SCM-WDM

2021 ◽  
pp. 35-43
Author(s):  
Hiền
Keyword(s):  
Wavelength Division Multiplexing ◽  
Bit Error Rate ◽  
Error Rate ◽  
Free Space ◽  
Quantum Key Distribution ◽  
Key Distribution ◽  
Secret Key ◽  
Quantum Bit ◽  
Wavelength Division ◽  
Free Space Optic

Phân phối khoá lượng tử QKD (Quantum Key Distribution) là giải pháp có khả năng đảm an ninh vô điều kiện nhờ áp dụng luật cơ lượng tử để phân phối khóa an toàn giữa hai bên hợp pháp với sự hiện diện của kẻ nghe lén. Sử dụng vệ tinh để phân phối khóa lượng tử tới các trạm mặt đất qua kênh quang không gian tự do FSO (Free Space Optic) là giải pháp hứa hẹn tạo ra một mạng QKD phạm vi toàn cầu. Tuy nhiên, do ảnh hưởng của kênh FSO, đặc biệt là nhiễu loạn khí quyển, tốc độ truyền khóa bí mật SKR (Secret Key Rate) của các hệ thống QKD hiện tại bị hạn chế. Do đó, nghiên cứu này đề xuất mô hình hệ thống QKD đa kênh dựa trên ghép kênh phân chia theo bước sóng WDM (Wavelength Division Multiplexing) và ghép kênh sóng mang phụ SCM (Sub Carrier Multiplexing) nhằm tăng SKR. Sử dụng phương pháp phân tích lý thuyết với các công cụ giải tích và xác suất, nhóm tác giả đã xây dựng các công thức tính toán SKR và tỉ lệ lỗi bit lượng tử của hệ thống đề xuất. Kết quả khảo sát hiệu năng cho thấy, hệ thống QKD đa kênh cho phép cải thiện SKR so với hệ thống đơn kênh trong khi vẫn đảm bảo yêu cầu về QBER (Quantum Bit Error Rate).

Bit Error Rate Performance Limitations Due to Raman Amplifier Induced Crosstalk in a WDM Transmission System

2017 ◽  
Vol 38 (1) ◽  
Author(s):  
F. H. Tithi ◽  
S. P. Majumder
Keyword(s):  
Pump Power ◽  
Wavelength Division Multiplexing ◽  
Bit Error Rate ◽  
Error Rate ◽  
Optical Signal ◽  
Transmission System ◽  
Raman Amplification ◽  
Wavelength Division ◽  
Channel Separation ◽  
Wdm Transmission

AbstractAnalysis is carried out for a single span wavelength division multiplexing (WDM) transmission system with distributed Raman amplification to find the effect of amplifier induced crosstalk on the bit error rate (BER) with different system parameters. The results are evaluated in terms of crosstalk power induced in a WDM channel due to Raman amplification, optical signal to crosstalk ratio (OSCR) and BER at any distance for different pump power and number of WDM channels. The results show that the WDM system suffers power penalty due to crosstalk which is significant at higher pump power, higher channel separation and number of WDM channel. It is noticed that at a BER 10

Performance Analysis of Duobinary and AMI Techniques Using LG Modes in Hybrid MDM-WDM-FSO Transmission System

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Zhenlei Zhou ◽  
Erkai Li ◽  
Haiguang Zhang
Keyword(s):  
Performance Analysis ◽  
Wavelength Division Multiplexing ◽  
Bit Error Rate ◽  
Error Rate ◽  
Optical Communications ◽  
Free Space Optical ◽  
Wavelength Division ◽  
Mode Division Multiplexing ◽  
Simulation Results ◽  
Ber Performance

AbstractThis work is focused on transmission of duobinary and alternate mark inversion (AMI) modulation, adopting mode division multiplexing (MDM) of Laguerre Gaussian (LG) modes has been capitalized in wavelength division multiplexing (WDM) system, resulting in a 1.6 Gbps eight-channel free space optical communications (FSO) system. The simulation results show that duobinary offers better bit error rate (BER) performance compared to AMI for proposed hybrid MDM-WDM-FSO system.

Performance evaluation of a multihop WDM network with share-per-node L-WIXC architecture

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Munira Haque ◽  
Satya P. Majumder
Keyword(s):  
Wavelength Division Multiplexing ◽  
Bit Error Rate ◽  
Error Rate ◽  
Design Parameters ◽  
Power Penalty ◽  
Wavelength Division ◽  
System Parameters ◽  
Wdm Network ◽  
The Impact ◽  
Wdm Transmission

AbstractThis paper investigates the impact of coherent and incoherent crosstalks on bit error rate of a multihop wavelength division multiplexing (WDM) transmission system with limited-wavelength-interchanging cross connects (L-WIXCs). The relation between the crosstalk and signal to crosstalk plus noise ratio at the receiver output is analyzed and redefined with an improved mathematical modeling. Quantitative analysis of the bit error rate (BER) in terms of system parameters like number of hops, number of fiber and number of wavelength channels per fiber are evaluated. The power penalty due to accumulated crosstalk at a given BER of 10−9 and the optimum system design parameters are also determined numerically. Results show that there is a significant power penalty of the order of 10–12 dB due to accumulated crosstalk depending on the number of hops. Maximum allowable number of hops at a given BER of 10−9 and number of input fibers are also evaluated.

Hybrid OCDMA over WDM System Using Modified Double Weight (MDW) Code for Optical Access Network

2012 ◽  
Vol 433-440 ◽  
pp. 3878-3883
Author(s):  
N. Ahmed ◽  
S. A. Aljunid ◽  
Hilal A. Fadil ◽  
R. B. Ahmad ◽  
M.A. Rashid
Keyword(s):  
Wavelength Division Multiplexing ◽  
Bit Error Rate ◽  
Error Rate ◽  
Access Network ◽  
Optical Access ◽  
Optical Access Network ◽  
Wavelength Division ◽  
Promising Solution ◽  
Code Division Multiple ◽  
Network Capability

In this paper a hybrid optical code division multiple access (OCDMA) over wavelength division multiplexing (WDM) network is proposed to support large number of subscribers. The system combines two different techniques, namely OCDMA and WDM for supporting many subscribers simultaneously. We used modified double weight (MDW) codes as a signature address in designing the system because this code can accommodate more number of simultaneous active users under considerable standard bit error rate (e.g. ≤ 10-9). The induced MDW code for hybrid system can eliminate multiuser interference fully and increase the bit-error-rate performance compared to other codes at the same time. We ascertained by simulation results that the proposed scheme provides very good performance and enhance the network capability. Therefore, this system can be considered as a promising solution for the next generation optical access network.

scholarly journals ANALISIS PERANCANGAN SISTEM (WAVELENGTH DIVISION MULTIPLEXING) WDM-PON PADA TEKNOLOGI XG-PON DENGAN MENGGUNAKAN SOFTWARE OPTISYSTEM

2020 ◽  
Vol 3 (1) ◽  
pp. 28-34
Author(s):  
Dini Anggraini ◽  
Efri Sandi ◽  
Arum Setyowati
Keyword(s):  
Wavelength Division Multiplexing ◽  
Bit Error Rate ◽  
Error Rate ◽  
Q Factor ◽  
Wavelength Division ◽  
Link Budget ◽  
Wdm Pon

Teknologi XG-PON merupakan pengembangan dari teknologi G-PON. Perbedaan XG- PON dengan G-PON adalah bitrate nya. Penelitian ini bertujuan untuk menganalisis perancangan dari sistem WDM-PON pada teknologi XG-PON dengan menggunakan software optisystem. Pada perancangan penelitian memiliki beberapa parameter data yang diambil, antara lain Q-Factor, Bit Error Rate dan Power Link Budget. Rancang jaringan WDM-PON pada teknologi XG-PON menggunakan software optisystem melalui tahap simulasi dengan cara mengubah jarak 10-50 Km dan mengubah PTx sebesar 2-8 dBm pada software optisystem. Hasil yang didapatkan dari rancangan WDM-PON pada teknologi XG-PON adalah layak dengan memenuhi standar jaringan yang ada dengan Power Link Budget sebesar -27.54 dBm. Serta mendapatkan hasil dari penelitian Bit Error Rate terhadap jarak dimana semakin dekat jarak maka Bit Error Rate akan semakin bagus dan bila semakin jauh jarak maka Bit Error Rate akan semakin buruk.

scholarly journals 32-CHANNEL DWDM SYSTEM WITH DIFFERENT AMPLIFIERS AND MODULATIONS

2021 ◽  
Vol 21 (2) ◽  
pp. 22-27
Author(s):  
Norbert ZDRAVECKÝ ◽  
◽  
Ľuboš OVSENÍK ◽  
Jakub ORAVEC ◽  
Maroš LAPČÁK
Keyword(s):  
Wavelength Division Multiplexing ◽  
Bit Error Rate ◽  
Error Rate ◽  
Optical Amplifiers ◽  
Optical Channel ◽  
Q Factor ◽  
Nonlinear Characteristics ◽  
Transfer Rates ◽  
Wavelength Division ◽  
Dwdm System

Wavelength Division Multiplexing is a technology that has enabled the transmission of huge amounts of data at high transfer rates over a single optical fiber. The capacity of an optical channel is usually affected by the shape of signal, nonlinear characteristics and dispersion. In this article, we focus on the DWDM system, optical amplifiers, and optical modulations in 32-channel DWDM system, which was designed in the OptiSystem program. We evaluate the parameters BER (Bit Error Rate) and Q factor for 40 Gb/s systems with changing amplifiers.

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