scholarly journals Signal Processing Algorithms for Down-Stream Traffic in Next Generation 10 Gbit/s Fixed-Grid Passive Optical Networks

2014 ◽  
Vol 2014 ◽  
pp. 1-4
Author(s):  
Rameez Asif ◽  
Rabeea Basir ◽  
Ramshah Ahmad
Keyword(s):  
Signal Processing ◽  
Optical Networks ◽  
Phase Conjugation ◽  
Passive Optical Network ◽  
Next Generation ◽  
Fixed Grid ◽  
Signal Processing Algorithms ◽  
Processing Algorithms ◽  
5 Ghz ◽  
The Impact

We have analyzed the impact of digital and optical signal processing algorithms, that is, Volterra equalization (VE), digital backpropagation (BP), and optical phase conjugation with nonlinearity module (OPC-NM), in next generation 10 Gbit/s (also referred to as XG) DP-QPSK long haul WDM (fixed-grid) passive optical network (PON) without midspan repeaters over 120 km standard single mode fiber (SMF) link for downstream signals. Due to the compensation of optical Kerr effects, the sensitivity penalty is improved by 2 dB by implementing BP algorithm, 1.5 dB by VE algorithm, and 2.69 dB by OPC-NM. Moreover, with the implementation of NL equalization technique, we are able to get the transmission distance of 126.6 km SMF for the 1 : 1024 split ratio at 5 GHz channel spacing in the nonlinear region.

scholarly journals Design and Simulation of Physical Layer Security for Next Generation Intelligent Optical Networks

2021 ◽  
Author(s):  
valarmathi marudhai ◽  
Shanthi Prince ◽  
Shayna Kumari
Keyword(s):  
Optical Networks ◽  
Shot Noise ◽  
Transmission Loss ◽  
Optical Network ◽  
Binary Sequence ◽  
Optical Amplifier ◽  
Next Generation ◽  
Wavelength Converter ◽  
Link Length ◽  
Intelligent Optical Networks

Abstract With the latest technological advancements and attractive features of next generation intelligent optical networks such as high bandwidth, low power consumption, and low transmission loss, etc., they have been considered as most viable solution to satisfy promptly growing bandwidth demands. However, main optical network components bring forth a set of security challenges and reliability issues, accompanied by new vulnerabilities within the network. This paper proposes a new design for an optical encryption and decryption method for enhancing optical network security using p-i-n photodiode which generates Pseudo Random Binary Sequence (PRBS) as a shot noise fluctuations and wavelength converter based design using Semiconductor Optical Amplifier (SOA) based XOR gate which utilizes Cross-Phase Modulation (XPM). The system performance based on Bit Error Rate (BER) and Q factor are analyzed at different data rates for different link lengths up to 100 km using OptiSystem. It is observed that error free transmission with a BER of 10-12 is achieved a data rate of 10Gbps for a link length of only 30 Km for the system with PIN photodiode’s shot noise being used for PRBS sequence generation. However, wavelength conversion based system enables transmission of signal at 10Gbps signal up to a link length of 90Km.

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