scholarly journals Optical-Amplifier-Compatible Long-Distance Secure Key Generation Based on Random Phase Fluctuations for WDM Systems

Sensors ◽  
2020 ◽  
Vol 20 (21) ◽  
pp. 6296
Author(s):  
Ben Wu ◽  
Yue-Kai Huang
Keyword(s):  
Wavelength Division Multiplexing ◽  
Distribution System ◽  
Optical Amplifiers ◽  
Random Phase ◽  
Distribution Channel ◽  
Optical Amplifier ◽  
Key Generation ◽  
Secret Key ◽  
Long Distance ◽  
Phase Fluctuations

We proposed and experimentally demonstrated a secure key generation and distribution system that is compatible with optical amplifiers and standard wavelength-division multiplexing (WDM) transmission systems. The key is generated from the phase fluctuations induced by environmental instabilities. The key generation system is tested in a 240 km bidirectional fiber-pair link with multiple optical amplifiers. To demonstrate the compatibility with WDM systems, 38 WDM channels are transmitted together with the key distribution channel. The secret key is protected against eavesdropping and coherence detection attack by the wide-band property of the signal carrier and the fast-changing rate of the phase fluctuations.

Study the Performance of Various Optical Amplifiers for 80 Channels WDM System Using Attenuator

2018 ◽  
Vol 0 (0) ◽  
Author(s):  
◽  
Chakresh Kumar
Keyword(s):  
Wavelength Division Multiplexing ◽  
Semiconductor Optical Amplifier ◽  
Optical Amplifiers ◽  
Optical Amplifier ◽  
Data Rate ◽  
Q Factor ◽  
Eye Diagram ◽  
Wavelength Division ◽  
Transmission Distance ◽  
Erbium Doped

AbstractIn this paper we have study the performance of different optical amplifiers (Erbium doped amplifier (EDFA), RAMAN amplifier, and semiconductor optical amplifier (SOA)) for 80 channels wavelength division multiplexing (WDM) system with the data rate at 10 Gbps data rate for the transmission distance of 280 km After getting the results of these amplifiers the performance of these has to be compared The Q-factor values achieved better in EDFA as compared to SOA and RAMAN. While the BER getting good in SOA as compared with other amplifiers but in EDFA after 200 km it goes saturated, the Power achieved at the power estimator is getting better in EDFA optical amplifier while in other amplifier it achieved negative. At the end it is also study the Power with frequency in THz and the Eye Diagram of such amplifiers results.

scholarly journals Comparison of the Optical Amplifiers EDFA and SOA Based on the BER and Q-Factor in C-Band

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Tomáš Ivaniga ◽  
Petr Ivaniga
Keyword(s):  
Wavelength Division Multiplexing ◽  
Optical Communication ◽  
Communication System ◽  
Optical Amplifiers ◽  
Software Tool ◽  
Optical Amplifier ◽  
Communication Line ◽  
Optical Communication System ◽  
Wavelength Division ◽  
Fibre Amplifier

Currently it is not possible to create a fully optical communication system without a software tool which simulates an optical communication line in real conditions prior to its construction. The aim of this article is to establish a comparison between the EDFA (erbium doped fibre amplifier) and SOA (semiconductor optical amplifier) optical amplifiers in the WDM (wavelength division multiplexing) system. The system contains a four-channel WDM with speed of 10 Gbps and optical fibre with length of 80 km. Simulations are conducted in the programme environment “OptSim.” The quality of the optical communication system is evaluated by the BER (bit error rate) and Q-factor for individual wavelengths, namely, of 1558 nm and 1562 nm, which are within the C-band.

scholarly journals Performance Evaluation of Different Optical Amplifiers in Spectrum Sliced Free Space Optical Link

2019 ◽  
Vol 41 (1) ◽  
pp. 9-14 ◽  
Author(s):  
Aditi Thakur ◽  
Shaina Nagpal
Keyword(s):  
Wavelength Division Multiplexing ◽  
Free Space ◽  
High Speed ◽  
Optical Amplifiers ◽  
Fiber Amplifier ◽  
Optical Amplifier ◽  
Free Space Optical ◽  
Erbium Doped Fiber Amplifier ◽  
Wavelength Division ◽  
Space Optics

Abstract Free space optics (FSO) is well-competent and premier technology to cater the high speed services in different geographical areas such as hilly areas and inter building network. In this paper, we successfully demonstrated the spectrum sliced wavelength division multiplexed FSO system. In order to make system bandwidth efficient, frequency spacing of 75 GHz is taken among the wavelength division multiplexing (WDM) channels. Carrier spectrum broadening is achieved for spectrum slicing through the nonlinearity called self-phase modulation. Moreover, requirement of multiple laser sources is eliminated. However, in conventional WDM systems, n numbers of lasers are needed to generate n WDM channels. To strengthen the signal in this FSO system, three optical amplifiers are scrutinized such as erbium-doped fiber amplifier (EDFA), semiconductor optical amplifier (SOA) and Raman amplifier in terms of Q-factor and bit error rate (BER). Results revealed that EDFA is best amplifier in proposed SS-WDM-FSO system.

Influence of Conventional Optical Amplifiers for 64×10 Gbps WDM System

2018 ◽  
Vol 0 (0) ◽  
Author(s):  
Shubham Kheraliya ◽  
Chakresh Kumar ◽  
Ghanendra Kumar ◽  
Shiv Ram Meena
Keyword(s):  
Bit Error Rate ◽  
Error Rate ◽  
Semiconductor Optical Amplifier ◽  
Laser Power ◽  
Fiber Length ◽  
Optical Amplifiers ◽  
Optical Amplifier ◽  
Q Factor ◽  
Long Distance ◽  
Raman Amplifier

AbstractIn this work we have investigated semiconductor optical amplifier (SOA), erbium-doped fiber amplifier (EDFA) and RAMAN Amplifier separately under 64 channels WDM system at 10 Gbps data rate. A comparison is made based upon the values of Q- factor, bit error rate (BER), and power received for different values of laser (present at the transmitter) power. The eye diagram for the three optical amplifiers has also been analyzed. Also the performance factors (Q- factor, BER, and power received) are evaluated for different values of fiber length. In general it is observed that with respect to the power received for a particular laser power (at the transmitter) and up to a fiber length of about 120 km Semiconductor optical amplifier (SOA) gives the best result among all the three amplifiers. With respect to the quality (Q) – factor the RAMAN Amplifier gives slightly better result for a given laser power and for a short fiber length (up to a fiber length of 50 km). For long distance (fiber length greater than 160 km) the Q – factor for all the three optical amplifier saturates and become equal. In terms of Bit Error Rate, RAMAN amplifier is best as it gives minimum BER at a given laser power but up to the fiber length of 70 km EDFA provides minimum BER.

Performance Analysis of FBG WDM System using Different Optical Amplifiers

2018 ◽  
Vol 0 (0) ◽  
Author(s):  
Suraj Jain ◽  
Chakresh Kumar
Keyword(s):  
Wavelength Division Multiplexing ◽  
Optical Amplifiers ◽  
Fiber Amplifier ◽  
Optical Amplifier ◽  
Q Factor ◽  
Erbium Doped Fiber Amplifier ◽  
Wavelength Division ◽  
Raman Amplifier ◽  
Erbium Doped ◽  
Channel Wavelength

AbstractThis paper aims to analyze the performance of FBG 60 channel wavelength-division multiplexing system using different optical amplifiers namely RAMAN, erbium-doped fiber amplifier (EDFA) and semiconductor optical amplifier (SOA) separately at 10 Gbps data rate up to a fiber length of 280 km. Based upon the results, the performance of the three amplifiers has been compared on the basis of multiple performance parameters. It is seen that EDFA simulates good results in terms of bit error rate (BER) up to a fiber distance of approximately 80 km and Q factor up to a distance of approximately 90 km among all the three amplifiers. However, power received is least in EDFA. RAMAN amplifier provides a better Q factor after the fiber distance of approximately 90 km and a better BER after the fiber distance of approximately 80 km compared to the other three amplifiers. SOA shows better results in terms of power received up to a fiber distance of approximately 100 km. RAMAN amplifier provides better output power after a distance of 100 km. Eye diagrams and power spectrums of the network with different optical amplifiers has also been analyzed.

Quantum cryptography for secret key generation using frequency-division long-distance interferometry

1996 ◽  
Author(s):  
Boris A. Slutsky ◽  
Pang Chen Sun ◽  
Yuri T. Mazurenko ◽  
Ramesh R. Rao ◽  
Yeshaiahu Fainman
Keyword(s):  
Quantum Cryptography ◽  
Key Generation ◽  
Frequency Division ◽  
Secret Key ◽  
Long Distance ◽  
Secret Key Generation

scholarly journals CSI-based versus RSS-based Secret-Key Generation under Correlated Eavesdropping

2020 ◽  
pp. 1-1
Author(s):  
Francois Rottenberg ◽  
Trung-Hien Nguyen ◽  
Jean-Michel Dricot ◽  
Francois Horlin ◽  
Jerome Louveaux
Keyword(s):  
Key Generation ◽  
Secret Key ◽  
Secret Key Generation
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