Pulse width shortening combinations (PWSC) for ultra-dense WDM systems and calculation of PWSE

2022 ◽  
Vol 0 (0) ◽  
Author(s):  
Rahul Kumar ◽  
Amandeep Singh Sappal
Keyword(s):  
Wavelength Division Multiplexing ◽  
Pulse Width ◽  
Communication Systems ◽  
Phase Conjugation ◽  
Link Length ◽  
Electrical Transmission ◽  
Dense Wavelength Division Multiplexing ◽  
Wavelength Division ◽  
Dense Wdm ◽  
Optical Communication Systems

Abstract Optical communication systems introduced paradigm shift in the forte of data transmission at higher speeds and over longer distances where, on contrary electrical transmission systems failed due to higher amplitude degradation, interferences and lower bandwidths. However, pulse width increase (PWI) in the optical fiber limits the overall distance reach and also introduces more bit errors which needs to addressed. So far, pulse width shortening fibers (PFs) and fiber Bragg grating (FG) used individually in most of the reported studies, however pulse width shortening (PWS) took either high cost (in PFs) or lower PWS efficiency (PWSE) (in FG). Therefore, in this research manuscript, we made emphasis on the combined PWS effects of diverse techniques such as optical phase conjugation (OC), FG and PFs in ultra-dense wavelength division multiplexing (WDM) system. Total link length of 400 km has been covered in 128 channels ultra dense wavelength division multiplexing (UDWDM) system at 10 Gbps by incorporating diverse combined organized placements of FG, OC and PFs such as FG-PF, OC-PF and FG-PF-OC. Results revealed that economical and maximum PWSE arrangement for proposed system is FG-PF-OC.

Demonstration of Multi Pump Wide Gain Raman Amplifiers for Maximization of Repeaters Distance in Optical Communication Systems

2015 ◽  
Vol 4 (1) ◽  
pp. 38
Author(s):  
Ahmed Zaki Rashed
Keyword(s):  
Wavelength Division Multiplexing ◽  
Optical Communication ◽  
Communication Systems ◽  
Gain Coefficient ◽  
Gain Medium ◽  
Wavelength Division ◽  
Raman Amplifiers ◽  
Optical Communication Systems ◽  
Multiple Wavelengths ◽  
Channel Wavelength

<p>Fiber Raman amplifiers in ultra wide wavelength division multiplexing (UW-WDM) systems have recently received much more attention because of their greatly extended bandwidth and distributed amplification with the installed fiber as gain medium. It has been shown that the bandwidth of the amplifier can be further increased and gain spectrum can be tailored by using pumping with multiple wavelengths. Wide gain of the amplifier is considered where two sets of pumps N<sub>R</sub> {5,10} are investigated. The gain coefficient is cast under polynomial forms. The pumping wavelength l<sub>R</sub> is over the range 1.40 £ l<sub>R</sub>, mm £ 1.44 and the channel wavelength l<sub>s</sub> is over the range 1.45 £ l<sub>s</sub>, mm £ 1.65. Two multiplexing techniques are processed in long-haul transmission cables where number of channels is up to 10000 in ultra-wide wavelength division multiplexing (UW-WDM) with number of links up to 480. The problem is investigated over wide ranges of affecting sets of parameters.</p>

Design of an Optical OR Gate using Mach-Zehnder Interferometers

2018 ◽  
Vol 39 (2) ◽  
pp. 161-165
Author(s):  
Kuldeep Choudhary ◽  
Santosh Kumar
Keyword(s):  
Wavelength Division Multiplexing ◽  
Communication Systems ◽  
Optical Switching ◽  
Beam Propagation Method ◽  
Mathematical Expression ◽  
Wavelength Division ◽  
Switching Phenomenon ◽  
Optical Communication Systems ◽  
Detailed Derivation ◽  
Or Gate

AbstractThe optical switching phenomenon enhances the speed of optical communication systems. It is widely used in the wavelength division multiplexing (WDM). In this work, an optical OR gate is proposed using the Mach-Zehnder interferometer (MZI) structure. The detailed derivation of mathematical expression have been shown. The analysis is carried out by simulating the proposed device with MATLAB and Beam propagation method.

scholarly journals Performance Analysis of Planar Nanocavities-Based Wavelength Demultiplexer for Optical Communication Systems

2013 ◽  
Vol 11 (5) ◽  
pp. 2552-2585
Author(s):  
Rasha H. Mahdi ◽  
Raad Sami Fyath
Keyword(s):  
Wavelength Division Multiplexing ◽  
Optical Communication ◽  
Communication Systems ◽  
Single Channel ◽  
Selective Reflection ◽  
Wavelength Division ◽  
Channel One ◽  
Wavelength Demultiplexer ◽  
Integrated Optical ◽  
Optical Communication Systems

This paper presents the design and analysis of planar plasmonic wavelength demultiplexer for optical communication systems. The demultiplexer is based on silver-air-silver plasmonic waveguide supported by two nanocavities for each drop channel. One cavity is used as a resonant tunneling-based channel drop filter while the other is used to realize wavelength-selective reflection feedback in the bus waveguide.  For each channel, a parametric study is performed to characterize the performance of the two corresponding nanocavities when they are operating in isolated mode.  The results are then used as a basis to design a single-channel demultiplexer by introducing the coupling between the two nanocavities. Simulation results are reported for a three-channel demultiplexer (1550, 1300, and 850 nm) using Computer Simulation Technology (CST) software package. A drop efficiency as high as  is obtained for each drop channel in the designed demultiplexer. The simulated results can be used as a guideline to design ultra-compact wavelength-division multiplexing (WDM) systems in highly integrated optical circuits. 

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