INVESTIGATIONS OF FIBER NONLINEARITIES IN LONG-HAUL OPTICAL WDM TRANSMISSION SYSTEMS

2009 ◽  
Vol 18 (02) ◽  
pp. 301-308
Author(s):  
GURMEET KAUR ◽  
M. L. SINGH ◽  
M. S. PATTERH
Keyword(s):  
Wavelength Division Multiplexing ◽  
Input Power ◽  
Fiber Amplifiers ◽  
Signal Attenuation ◽  
Fiber Nonlinearities ◽  
Wavelength Division ◽  
Optical Wdm ◽  
Electro Optic ◽  
Erbium Doped ◽  
Amplified Spontaneous Emission Noise

Wavelength division multiplexing (WDM) has been emerging as an effective technique for making use of the full bandwidth offered by optical fiber. To achieve long-haul transmission, erbium-doped fiber amplifiers (EDFAs) are employed to compensate for signal attenuation without using optoelectronic/electro-optic conversions. Transmission in these systems is limited by fiber nonlinearities and amplified spontaneous emission noise from amplifiers. In this paper, the long-haul optical WDM system with EDFAs is investigated theoretically. The noise and bit error rate (BER) characteristics of the system with optical amplifiers are calculated and the dependence of the BER on interamplifier separation and input power is shown.

Design of EDFA based 16 channel WDM system using counter directional high pump power

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Md. Asraful Sekh ◽  
Mijanur Rahim ◽  
Anjumanara Begam
Keyword(s):  
Pump Power ◽  
Wavelength Division Multiplexing ◽  
Input Power ◽  
Low Noise ◽  
Fiber Amplifiers ◽  
Wavelength Division ◽  
High Pump Power ◽  
Erbium Doped ◽  
High Pump ◽  
Channel Wavelength

Abstract In this paper, design of erbium-doped fiber amplifiers (EDFA) based 16 channel wavelength-division multiplexing (WDM) system for different pump powers and input signal levels using counter propagating pumping scheme is reported. Wavelength range between 1548 and 1560 nm in C-band with channel spacing of 0.75 nm at a bit rate of 10 Gbps are used. Input power given to all the channels is taken between −20 and −35 dBm with 3 dBm variation. Pump power levels between 100 and 500 mW at 980 nm wavelength are used. Low gain flatness with high gains and low noise figures are achieved with the proposed scheme.

scholarly journals Design of a Hybrid Optical amplifier for 64 DWDM Channels network by using EDFA and Raman Amplifier

2017 ◽  
Vol 5 (4) ◽  
pp. 18-23
Author(s):  
Bandana Mallick ◽  
Bibhu Prasad ◽  
Dr. Krishna Chandra Patra
Keyword(s):  
Wavelength Division Multiplexing ◽  
Fiber Amplifier ◽  
Optical Amplifier ◽  
Input Power ◽  
Fiber Amplifiers ◽  
Wavelength Division ◽  
Raman Amplifier ◽  
Optical Fiber Amplifier ◽  
Erbium Doped ◽  
Different Types

In this paper a hybrid amplifier EDFA-RAMAN DWDM transmission system is proposed and demonstrated. A new hybrid two-stage optical fiber amplifier for dense wavelength division multiplexing (DWDM) network is observed. The hybrid amplifier is cascaded erbium- doped fiber amplifiers (EDFA) & Raman amplifier which provide a nearly flat gain over 80 nm. The hybrid amplifier has been modeled using an Optic-System version 14 on a DWDM transmission. In this paper we compare Q-factor at different input power i.e. at 0db and at 10 db. Here two different types of apodized function (Uniform & Gaussian) are selected as fiber Bragg grating parameters and system performance is analyzed. Performance of the system is analyzed by using BER analyzer.

Optical Networks Performance Optimization Based on Hybrid Configurations of Optical Fiber Amplifiers and Optical Receivers

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
I. S. Amiri ◽  
Fatma Mohammed Aref Mahmoud Houssien ◽  
Ahmed Nabih Zaki Rashed ◽  
Abd El-Naser A. Mohammed
Keyword(s):  
Optical Fiber ◽  
Optical Networks ◽  
Wavelength Division Multiplexing ◽  
Performance Optimization ◽  
Input Power ◽  
Fiber Amplifiers ◽  
Q Factor ◽  
Wavelength Division ◽  
Transmission Distance ◽  
Optical Fiber Amplifiers

AbstractThe 16-channels dense wavelength division multiplexing (DWDM) systems have been optimized by utilizing hybrid configurations of conventional optical fiber amplifiers (EDFA, RAMAN and SOA) and optical photodetectors (PIN, APD(Si) and APD(InGaAs)). The DWDM systems were implemented for 5 Gb/s channel speed using one of these configurations with 100 GHz channel spacing and 25 km amplifying section. The hybrid configurations are the combinations of (PIN + EDFA), (PIN + RAMAN), (PIN + SOA), (APD(Si) + EDFA), (APD(Si) + RAMAN), (APD(Si) + SOA), (APD(InGaAs) + EDFA), (APD(InGaAs) + RAMAN) and (APD(InGaAs) + SOA). Based on BER, Q-factor and eye diagrams, the performance was compared for these configurations under influences of various thermal noise levels of photodetectors over different fiber lengths ranging from 25 km up to 150 km. The results revealed that both APD structures give optimum performance at input power Pin = 5 dBm due to high internal avalanche gain. EDFA outperforms RAMAN and SOA amplifiers. SOA amplifier shows degraded performance because of nonlinearity effects induced. RAMAN amplifier seems to be the best alternative for long reach DWDM systems because it minimizes the effects of fiber nonlinearities. The configuration (APD(Si) + EDFA) is the most efficient and recommended to be used for transmission distance beyond 100 km due to its larger Q-factor.

Investigations of Different Amplifiers in 16 × 40 Gb/S WDM System

2019 ◽  
Vol 40 (4) ◽  
pp. 341-346
Author(s):  
Kulwinder Singh ◽  
Karan Goel ◽  
Kamaljit Singh Bhatia ◽  
Hardeep Singh Ryait
Keyword(s):  
Wavelength Division Multiplexing ◽  
Fiber Amplifier ◽  
Optical Amplifier ◽  
Fiber Amplifiers ◽  
Erbium Doped Fiber Amplifier ◽  
Wavelength Division ◽  
Transmission Distance ◽  
Erbium Doped ◽  
Eye Opening ◽  
Eye Closure

Abstract Different fiber amplifiers such as semiconductor optical amplifier, erbium-doped fiber amplifier and erbium ytterbium-co-doped fiber amplifier (EYCDFA) are investigated for 16×40 GB/s wavelength division multiplexing system. Various performance parameters including Q-factor, bit error rate, jitter, eye opening and eye closure are observed and analyzed. It is reported that EYCDFA is a better choice among the tested amplifiers. The proposed system is also investigated in terms of transmission distance.

Testability of Erbium Doped Fiber Amplifiers: An Approach Towards Yield Improvement

2004 ◽  
Author(s):  
Salil Pradhan ◽  
John Arbulich ◽  
Purushothaman Damodaran ◽  
K. Srihari
Keyword(s):  
Wavelength Division Multiplexing ◽  
Failure Modes ◽  
Noise Figure ◽  
High Volume ◽  
Fiber Amplifiers ◽  
Critical Parameters ◽  
Yield Improvement ◽  
Wavelength Division ◽  
Erbium Doped ◽  
First Pass

Erbium Doped Fiber Amplifiers (EDFAs) are extensively used in Dense Wavelength Division Multiplexing (DWDM) technology for long haul optical transmission networks. The manufacturing of optoelectronic products has been gradually transferred from Original Equipment Manufacturers (OEMs) to the Electronics Manufacturing Service (EMS) providers. Operator dependency and the lack of automation increase the cycle time in optoelectronics manufacturing. Manufacturing difficulties and lower yield reduce the throughput. Consequently, identifying and implementing activities to improve yield becomes crucial for an EMS provider to survive in a medium-to-high volume environment. During the manufacturing processes, several tests are conducted to calibrate the EDFA at room temperature and temperature extremes. Critical parameters such as gain, flatness, and the noise figure are monitored at multiple stages. Failures (or non-conformities) observed in any of these parameters at any stage results in a reduced first pass yield. In this paper, several aspects of testing an EDFA and the failure modes at various stages, which result in lower yields, have been discussed. Root cause analysis and the corrective actions taken to significantly improve the first pass yield are presented. Relationships between some of the critical parameters have been discussed. Finally, guidelines for yield improvement are delineated. The results are based upon studies conducted on an EDFA, which is manufactured by the facility where this research was conducted.

Bidirectional erbium-doped fiber amplifiers used in joint frequency and time transfer based on wavelength-division multiplexing technology

2015 ◽  
Vol 13 (11) ◽  
pp. 110601-110605 ◽  
Author(s):  
Qin Liu Qin Liu ◽  
Wei Chen Wei Chen ◽  
Dan Xu Dan Xu ◽  
Nan Cheng Nan Cheng ◽  
Fei Yang Fei Yang ◽  
...  
Keyword(s):  
Wavelength Division Multiplexing ◽  
Fiber Amplifiers ◽  
Time Transfer ◽  
Wavelength Division ◽  
Erbium Doped ◽  
Joint Frequency
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