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29 articles for “WDM”
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Performance of NRZ and Manchester DPSK Downstream and Upstream OOK for WDM-PON
Abstract: AbstractA novel data re-modulation scheme with downstream. Differential phase shift keying (DPSK) signals and on-off keying (OOK) upstream signal modulation format is proposed for wavelength-division multiplexing (WDM) – passive optical networks (PON) in the letter. A simulation on 5-Gb/s downstream optical DPSK signal and 5 Gb/s upstream optical OOK signal. 5Gb/S on DPSK OOK all are successfully demonstrated over 20-km single mode fiber without chromatic dispersion compensation.Keywords: Differential phase-shift keying …
Published in Trends in Opto-electro & Optical Communication · Vol. 7, Issue 1, 2017 · pp. 6–9 Read article
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A NUMERICAL SIMULATION OF OPTICAL RECEIVER PERFORMANCE OF WDM SIGNALS IN A PON
Abstract: This work presents MATLAB 7.9 model of wavelength division multiplexed (WDM) communication system for evaluating the performance of optical receiver simulation of WDM-PON (passive optical network). This paper attempts to focus on eliminating the channel internal noise due to number of users at different noise power levels, iterations, values of BER (bit error rate) and error count within time elapsed in seconds. Optical communication systems have good speed, accuracy and …
Published in Recent Trends in Electronics Communication Systems · Vol. 1, Issue 1, 2014 · pp. 21–24 Read article
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WDM Transmission for Free Space Optics under Different Atmospheric Conditions
Abstract: AbstractThis paper presents the design and simulation of a 32-channel WDM transmission system for free space optics (FSO) taking different atmospheric effects (rain, fog and scintillation) into account. The commercial software, namely, OptiSystem is used for the design of WDM-FSO where the system performances are evaluated in terms of bit error rate (BER) and eye diagrams. Weather data of Khulna, a district in the south-western part of Bangladesh, is used …
Published in Trends in Opto-electro & Optical Communication · Vol. 4, Issue 1, 2014 · pp. 7–12 Read article
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Performance Analysis of 160 Channel WDM System with EDFA Amplifier
Abstract: AbstractErbium Doped Fiber Amplifier (EDFA) amplifiers are popularly used in wavelength division multiplexing (WDM) system to compensate attenuation and dispersion. The performance of EDFA depends on various parameters such as, EDFA length, Er+3 doping concentration, active fiber length, pump power, pumping wavelength etc. This paper analyzed the performance of EDFA with counter pumping and co-pumping varying the EDFA length, pump power and Er+3 doping concentration and optimized the values for …
Published in Trends in Opto-electro & Optical Communication · Vol. 7, Issue 3, 2017 · pp. 25–34 Read article
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Investigations with WDM Network using Optical Cross Connects
Abstract: AbstractOptical cross-connects are key part of the wavelength division multiplexed based optical communication networks. Accordingly, this paper is focused on the performance evaluation for the optical cross-connects. Here, WDM system for the non-return to zero with 100 GHz channel to channel spaced network has been designed. The optical link’s performance has been numerically simulated and successfully explored for the numerous key design parameters at 20 Gbps data rate. Investigations inferred …
Published in Trends in Opto-electro & Optical Communication · Vol. 7, Issue 3, 2017 · pp. 1–6 Read article
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Comparison of Advance Data Modulation Formats in 4×10 Gbps WDM Optical Communication System using YDFA-EDFA and Raman-EDFA Hybrid Amplifiers
Abstract: In this paper, comparison of various advance data modulation formats in 4×10 Gbps wavelength division multiplexing (WDM) optical communication system using various hybrid optical amplifiers (YDFA-EDFA and Raman-EDFA) has been carried out. The advance modulation formats under study include non-return-to-zero (NRZ), return-to-zero (RZ), carrier-suppressed return-to-zero (CSRZ), Duobinary return-to-zero (DRZ) and modified Duobinary return-to-zero (MDRZ). The WDM hybrid system has been analyzed over 100 km fiber for 10 Gbps system. It …
Published in Current Trends in Information Technology · Vol. 10, Issue 1, 2020 · pp. 23–29 Read article
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Characterizing L-Band EDFA for WDM Optical Communication using Implicit Analytical Model
Abstract: ABSTRACT In this paper, some of the significant design parameters of L-band EDFA such as choice of optimum pump wavelength, optimum erbium-doped fiber (EDF) length, and optimum pump power have been characterized by solving implicit analytical signal gain equation using simulation as derived for C-band EDFA by F. F. Rühl. After determining optimum pump wavelength, optimum pump power and optimum EDF length, performance of L-band signal amplification has been shown …
Published in Trends in Opto-electro & Optical Communication · Vol. 2, Issue 3, 2012 · pp. 8–16 Read article
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Effect of Crosstalk of a Proposed Optical Cross-Connect Topology in OXC Switched WDM Networks
Abstract: ABSTRACTThis paper presents an optical wavelength division multiplexed cross-connect topology, which is modified form of the existing optical cross-connect (OXC) topologies. An analytical approach is developed for the proposed topology to explore the effect of crosstalk induced in multichannel WDM networks due to OXC. Factors that affect the magnitude of crosstalk in the OXC are investigated and different parameters are optimized to reduce the total OXC-induced crosstalk. The crosstalk performance …
Published in Trends in Opto-electro & Optical Communication · Vol. 1, Issue 1-3, 2011 · pp. 8–15 Read article
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Design of Plasmonic Based Splitters for WDM Applications
Abstract: AbstractPlasmonics has special property of metallic nanostructures to allow manipulation and routing of light at nanoscale. In this paper, 1×2 and 1×4 splitters are designed using metal-insulator-metal (MIM) plasmonic waveguides. These proposed splitter designs could be used to conquer various filtering devices for high assimilation in surface plasmon polaritons based metallic surfaces. The results are verified using finite difference time domain (FDTD).Keywords: Plasmonics waveguides, surface plasmons, finite difference time domain …
Published in Trends in Opto-electro & Optical Communication · Vol. 6, Issue 1, 2016 · pp. 14–19 Read article
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Design Optimization of C-Band 4-Channel WDM Optical Communication System using EDFA
Abstract: AbstractIn this work, the design and experimental characterization of high performance C band Erbium Doped Fiber Amplifier (EDFA) booster which is pumped at 980 nm are presented. The system is simulated using Optisystem software to achieve gain flatness of EDF through optimized fiber length and pumping wavelength. The performance of the system is more efficient at the pumping wavelength of 980 nm than that of 1480 nm for a wide …
Published in Trends in Opto-electro & Optical Communication · Vol. 4, Issue 2, 2014 · pp. 1–8 Read article
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A Resource Efficient Fast Recovery Strategy for Survivable WDM Networks
Abstract: ABSTRACT In WDM networks when failure occurs, huge amount of data is lost in a fraction of second. Therefore, the failed connection request must be re-routed through backup route as soon as possible. For achieving fast connection recovery, the primary lightpath is either link or segmented protected. However, the strategies result in inefficient utilization of resources. In this paper, we present a resource efficient parallel signaling-shared path protection (PS-SPP) based …
Published in Trends in Opto-electro & Optical Communication · Vol. 2, Issue 1, 2012 · pp. 1–17 Read article
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Performance evaluation of a hybrid dispersion compensation technique (DCF + FBG) for the deployment of WDM optical systems
Abstract: A 4-channel WDM optical communication system is configured and a hybrid dispersion compensation technique which realizes the transmission of signals over a 120 km single mode optical fiber is proposed in the present article. The hybrid scheme which is put forward in this paper involves the combination of (post + pre) DCF module and a FBG module. The proposed layout is simulated using the Optisystem 15.0 software and the simulation …
Published in Journal of Advances in Shell Programming · Vol. 5, Issue 1, 2018 · pp. 9–13 Read article
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Performance Investigation of Hybrid Raman- EDFA amplifier in WDM network
Abstract: A composite layout of Erbium-Doped-Fiber amplifier(EDFA) and Raman amplifier is put forward to retrieve a better performance in terms of gain, noise figure and flat gain. It is based on the optimal configuration of parameters of a singly based Raman amplifier and EDFA. The leading parameter for both the amplification has been analysed with respect to its input signal, power, pump power and their fiber length although the best erbium …
Published in Journal of Advances in Shell Programming · Vol. 5, Issue 1, 2018 · pp. 20–25 Read article
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Wavelength Division Multiplexing in Optical Networks Using Radio Over Fiber
Abstract: AbstractThis paper contains a detailed study about WDM (wavelength division multiplexing) optical networks. The bandwidth, speed and loss of signals in communication have a reason to worry in communication systems; WDM makes the possible solution to resurrect the systems of communications with the help of this technology. The issue emerges when the interest for transfer speed in a fiber optic system surpasses the present limit, without requiring any extra fiber, …
Published in Journal of Communication Engineering & Systems · Vol. 9, Issue 3, 2019 · pp. 12–15 Read article
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Performance Comparison of FBG as Dispersion Compensator with Different Apodization in an Optical Fiber Link
Abstract: AbstractNowadays, optical communication is a popular technique to transmit the data. In daily life, we share our useful data by using optical network but dispersion is the main performance limiting factor. However, the compensation of dispersion by dispersion compensating fiber (DCF) and fiber Bragg grating (FBG) can boost the system significantly. This proposed work investigates and analyzes the performance of optical transmission system at 1550 nm using FBG as dispersion …
Published in Trends in Opto-electro & Optical Communication · Vol. 8, Issue 2, 2018 · pp. 6–12 Read article
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Performance Comparison of FBG as Dispersion Compensator with Different Frequency Chirp in an Optical Fiber Link
Abstract: AbstractRecent day’s optical communication is a most popular technique for transmission of data. We share most of our data through optical network, but the main huddle in performance is dispersion. However, the compensation of dispersion by Dispersion Compensating Fiber (DCF) and Fiber Bragg Grating (FBG) can boost significantly the system. Our proposed work investigates and analyzes the performance of optical transmission system at 1550 nm using FBG as dispersion compensator. …
Published in Trends in Opto-electro & Optical Communication · Vol. 8, Issue 3, 2018 · pp. 1–7 Read article
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How Optical Communication Powers the Digital World and Lights the Way
Abstract: Optical communication has become the backbone of modern digital infrastructure, allowing huge volumes of data to be sent quickly and reliably around the world. This technology is far better than standard electrical communication systems because it uses light to carry information over optical fibres. Its bandwidth is larger, signal loss is reduced, and it is resistant to electromagnetic interference. This article talks about the basic ideas behind optical communication, such …
Published in Trends in Opto-electro & Optical Communication · Vol. 16, Issue 1, 2026 · pp. 15–21 Read article
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Machine Learning Based Optimization of Optical Fiber Parameters for Minimizing Dispersion and Attenuation
Abstract: Optical fibers provide high-bandwidth and low-loss transmission for modern communication networks; however, attenuation and chromatic dispersion remain two important physical limitations affecting transmission distance, pulse integrity, and system capacity. Conventional optical-fiber design generally relies on analytical calculations and repeated numerical simulations to determine suitable geometric and material parameters. Such approaches become computationally demanding when several fiber parameters are simultaneously optimized. This paper presents a machine-learning-based methodology for predicting and optimizing …
Published in Trends in Opto-electro & Optical Communication · Vol. 16, Issue 2, 2026 · pp. 18–28 Read article
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Simulation of Wavelength Division Multiplexing Based Fiber Optic Link by Using Different Types of Dispersion Compensating Fiber
Abstract: Wavelength division multiplexing (WDM) multiplies various optical signals on a single optical fiber by using different wavelengths of laser light at the transmitter end and demultiplex them into multiple opticalsignal at the receiver end. We want to improve overall system performance and reduced as much as possible the transmission performance influenced by the dispersion, several dispersion compensation technologies are involved. In this paper, we have studied the WDM based fiber …
Published in Trends in Opto-electro & Optical Communication · Vol. 11, Issue 4, 2021 · pp. 19–24 Read article
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Chromatic Dispersion Compensation in Optical Fiber Communication System using FBG and EDFA
Abstract: AbstractNowadays optical communication is a most significant technique to transmit the data. In daily life we share our useful data by using optical network but dispersion is the main factor towards limiting the performance of optical system. However, the compensation of dispersion by Dispersion Compensating Fiber (DCF) and Fiber Bragg Grating (FBG) can boost significantly the system. This proposed work investigates and analyze the chromatic dispersion compensation in optical fiber …
Published in Journal of Semiconductor Devices and Circuits · Vol. 6, Issue 3, 2019 · pp. 1–7 Read article