Efficient Routing Strategies of N × N RM-OXC Using C Band Based on T-FBG and OC

2018 ◽  
Vol 0 (0) ◽  
Author(s):  
Manpreet Singh ◽  
Aruna Rani ◽  
Sanjeev Dewra
Keyword(s):  
Wavelength Division Multiplexing ◽  
Cross Talk ◽  
Signal To Noise Ratio ◽  
Optical Amplifier ◽  
Optical Signal ◽  
Channel Spacing ◽  
Fiber Nonlinearities ◽  
Wavelength Division ◽  
Optical Circulator ◽  
Cross Connect

AbstractA novel architecture of N×N reconfigurable multiwavelength optical cross-connect based on tunable fiber Bragg grating (FBG) and optical circulator is proposed. The effect of cross talk in dense wavelength division multiplexing system with 0.8-nm channel spacing at 9×10 Gbps is also evaluated. Optical signal to noise ratio achieved is 40.95 dB at input transmission power of −10 dBm with acceptable bit error rate, i.e. 1.16×10−10at −30 dB FBG cross talk in the presence of fiber nonlinearities. It is found that signal is transmitted to a distance of 50 km without optical amplifier.

A Novel Architecture of N × N Bidirectional Reconfigurable Multiwavelength Optical Cross Connect

2020 ◽  
Vol 41 (2) ◽  
pp. 133-138
Author(s):  
Manpreet Singh
Keyword(s):  
Wavelength Division Multiplexing ◽  
High Speed ◽  
Signal To Noise Ratio ◽  
Optical Amplifier ◽  
Optical Signal ◽  
Fiber Nonlinearities ◽  
Wavelength Division ◽  
Optical Cross Connect ◽  
Optical Circulator ◽  
Cross Connect

AbstractA novel architecture of N×N bidirectional-reconfigurable multiwavelength optical cross connect (B-RMOXC) based on tunable Fiber Bragg grating and optical circulator is proposed. B-RMOXC network is one of crucial network element for wavelength routing in dense wavelength division multiplexing system. This paper presents a high speed, power compensated bidirectional optical cross connect and verified the performance of bidirectionality with 0.8-nm channel spacing having bit rate of 10 Gbps at different transmission distances. Optical signal-to-noise ratio of 36.62 dB and 35.55 dB is achieved with acceptable Quality factor of 6.26 and 6.99 respectively for upstream and downstream at 60 km having input transmission power of −12 dBm. It is found that the data can be communicated bidirectionally to a distance of 60 km in the presence of fiber nonlinearities without optical amplifier.

Investigation and optimization of EYDFA + Raman + EYDFA hybrid optical amplifier for SD-WDM systems in C+L band

2021 ◽  
pp. 2150006
Author(s):  
Anurupa Lubana ◽  
Sanmukh Kaur
Keyword(s):  
Wavelength Division Multiplexing ◽  
Signal To Noise Ratio ◽  
Fiber Amplifier ◽  
Optical Amplifier ◽  
Optical Signal ◽  
Channel Spacing ◽  
Channel System ◽  
Wavelength Division ◽  
Gain Variation ◽  
Hybrid Optical Amplifier

In this paper, we present a novel erbium–ytterbium doped fiber amplifier (EYDFA) + Raman + EYDFA hybrid optical amplifier (HOA) for a super-dense wavelength division multiplexing (SD-WDM) system application. The performance of the 100-channel system has been investigated for an overall data rate and channel spacing of 100[Formula: see text]Gb/s and 0.4[Formula: see text]nm, respectively, over a wavelength span of 1550–1589.9[Formula: see text]nm. HOA has been optimized for Raman length, EYDFA lengths, pump powers and Er[Formula: see text] concentrations to achieve high average gain and low gain variation ratio of 40.41[Formula: see text]dB and 0.40[Formula: see text]respectively. The optimized configuration of the proposed HOA has been compared with EYDFA + Raman and Raman + EYDFA HOA configurations. The achieved high and flat gain with an acceptable output optical signal to noise ratio (OSNR) in case of EYDFA + Raman + EYDFA HOA; makes it an optimum choice for SD-WDM systems.

Effect of Crosstalk in Super Dense Wavelength Division Multiplexing System using Hybrid Optical Amplifier

2019 ◽  
Vol 40 (4) ◽  
pp. 347-351
Author(s):  
Chakresh Kumar ◽  
Rakesh Goyal
Keyword(s):  
Wavelength Division Multiplexing ◽  
Optical Communication ◽  
Power Level ◽  
Optical Amplifier ◽  
Optical Signal ◽  
Dense Wavelength Division Multiplexing ◽  
Channel Spacing ◽  
Wavelength Division ◽  
Fiber Nonlinearity ◽  
Hybrid Optical Amplifier

Abstract Analysis of proposed 400×10 Gbps super dense wavelength division multiplexing (SD-WDM) system has been evaluated in term of crosstalk and optical signal to crosstalk ratio (OSCR). Amplification is carried out using RAMAN-EDFA hybrid optical amplifier (HOA) for the transmission of 300 km. The pump power of 550 mW at 1520 nm and 580 mW at 1530 nm are set to RAMAN and EDFA optical amplifier respectively. Further, the power level of 0 dBm with channel spacing of 100 GHz has shown the remarkable outcome of controlling the fiber nonlinearity to maintain the best rating optical communication for long haul distance.

Efficient Routing of Star–Ring Hybrid Topology with Optical Add and Drop Multiplexer in DWDM System

2016 ◽  
Vol 37 (4) ◽  
Author(s):  
Anju Bala ◽  
Sanjeev Dewra
Keyword(s):  
Wavelength Division Multiplexing ◽  
Signal To Noise Ratio ◽  
Optical Signal ◽  
Wavelength Routing ◽  
Ring Network ◽  
Channel Spacing ◽  
Wavelength Division ◽  
Hybrid Topology ◽  
Dwdm System ◽  
Add And Drop Multiplexer

AbstractThis paper investigates the performance of star–ring hybrid topology networks with optical add and drop multiplexer (OADM) in dense wavelength division multiplexing (DWDM) system with 0.8 nm channel spacing at different bit rates (5, 10 and 15 Gbps) in terms of bit error rate (BER), quality factor and optical signal-to-noise ratio (OSNR). OADM has the capability to add and drop the new channels and provides the wavelength routing between star and ring topologies. It is observed that the hybrid topology supports 128 users on upper and lower ends with 150 km distance between the nodes of ring network without dispersion compensating fiber.

Performance enhancement of Raman + EYDFA HOA for UD-WDM system applications

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Anurupa Lubana ◽  
Sanmukh Kaur ◽  
Yugnanda Malhotra
Keyword(s):  
Wavelength Division Multiplexing ◽  
Performance Enhancement ◽  
Optical Amplifier ◽  
Q Factor ◽  
Channel Spacing ◽  
Average Gain ◽  
Wavelength Division ◽  
System Parameters ◽  
Gain Variation ◽  
Hybrid Optical Amplifier

AbstractIn this work, we study and analyze the performance of Raman + Erbium-Ytterbium codoped fiber hybrid optical amplifier (HOA) for an ultradense wavelength division multiplexing (UD-WDM) system having 100 channels. The system has been investigated considering initial values of channel spacing and data rate of 0.1 nm (12.5 GHz) and 100 GB/s, respectively. Initially, the two important WDM system parameters—wavelength and channel spacing—have been selected and then optimization of the proposed HOA has been performed in terms of EYDFA length, pump power and Er+ concentration to achieve higher values of average gain, Q-factor and lower gain variation ratio. The optimized configuration of the HOA results in the achievement of higher value of average gain, Q-factor and gain variation ratio of 47 dB, 14 and 0.14, respectively, which confirms its viability for UD-WDM system applications.

Impact of Different Modulation Data Formats on DWDM System Using SOA With Narrow-Channel Spacing

2019 ◽  
Vol 40 (4) ◽  
pp. 435-439
Author(s):  
Aruna Rani ◽  
Manpreet Singh
Keyword(s):  
Wavelength Division Multiplexing ◽  
Optical Power ◽  
Narrow Channel ◽  
Optical Amplifier ◽  
Input Power ◽  
Channel Spacing ◽  
Wavelength Division ◽  
Data Formats ◽  
Transmission Length ◽  
Eye Closure

Abstract In this paper, the transmission performance of 64×10 Gbps wavelength division multiplexing system using semiconductor optical amplifier (SOA) with 0.4nm channel spacing has been demonstrated with different modulation data formats. The suitability of various data formats like nonreturn to zero rectangular (NRZ-rectangular), nonreturn to zero raised cosine, return to zero raised cosine, return to zero rectangular, return to zero supergaussian and return to zero soliton for an optical transmission link at ‒40dBm signal input power is evaluated. The results have been carried out by evaluating the value of quality factor, bit error rate (BER), eye closure and received optical power. It is found that using NRZ-rectangular data format, the signal can travel up to a transmission length of 260 km with acceptable BER (1.10e-09) and Q-factor (15.0 dB), respectively.

Impairments Computation for Routing Purposes in a Transparent-Access Optical Network Based on Optical CDMA and WDM

2016 ◽  
Vol 37 (2) ◽  
Author(s):  
Ahmed Musa
Keyword(s):  
Wavelength Division Multiplexing ◽  
Wavelength Conversion ◽  
Signal To Noise Ratio ◽  
Optical Network ◽  
Routing Algorithm ◽  
Optical Signal ◽  
Network Routing ◽  
Optical Cdma ◽  
Fiber Types ◽  
Wavelength Division

AbstractOptical access networks are becoming more widespread and the use of multiple services might require a transparent optical network (TON). Multiplexing and privacy could benefit from the combination of wavelength division multiplexing (WDM) and optical coding (OC) and wavelength conversion in optical switches. The routing process needs to be cognizant of different resource types and characteristics such as fiber types, fiber linear impairments such as attenuation, dispersion, etc. as well as fiber nonlinear impairments such as four-wave mixing, cross-phase modulation, etc. Other types of impairments, generated by optical nodes or photonic switches, also affect the signal quality (Q) or the optical signal to noise ratio (OSNR), which is related to the bit error rate (BER). Therefore, both link and switch impairments must be addressed and somehow incorporated into the routing algorithm. However, it is not practical to fully integrate all photonic-specific attributes in the routing process. In this study, new routing parameters and constraints are defined that reflect the distinct characteristics of photonic networking. These constraints are applied to the design phase of TON and expressed as a cost or metric form that will be used in the network routing algorithm.

scholarly journals Design of Novel Fiber Optical Flexible Routing System

2019 ◽  
Vol 9 (22) ◽  
pp. 4763
Author(s):  
Po-Tsung Wu ◽  
Tsair-Chun Liang
Keyword(s):  
Wavelength Division Multiplexing ◽  
Optical Network ◽  
Optical Signal ◽  
Arrayed Waveguide Gratings ◽  
Wavelength Division ◽  
Network Applications ◽  
Fiber Optic Network ◽  
Cross Connect ◽  
Arrayed Waveguide ◽  
Optic Network

In this paper, we propose a new versatile routing device that utilizes arrayed waveguide gratings (AWGs), optical switches, and optical circulators to implement reconfigurable optical add/drop multiplexers (ROADMs), optical interleavers, and optical cross-connect (OXC). With the development of dense wavelength division multiplexing (DWDM) technology, ROADM and OXC technologies have also been put into practical use. Thus, the optical signal can be routed directly in the optical network according to its wavelength without the need for optical-electrical-optical (OEO) conversion. Although different optical network units (ONUs) have different bandwidth requirements, the use of optical interleavers has successfully solved the connection problem between old and new systems. According to the numerical experiments of static characteristics, the proposed routing device can effectively implement three different functionalities, thereby providing greater flexibility for fiber optic network applications.

scholarly journals A Pulse Shaping Based Optical Transmission System of 128QAM for DWDM with N × 904 Gbps

2019 ◽  
Vol 9 (5) ◽  
pp. 988 ◽  
Author(s):  
Guang Li ◽  
Jianqing Li
Keyword(s):  
Wavelength Division Multiplexing ◽  
Optical Transmission ◽  
Signal To Noise Ratio ◽  
Optical Filter ◽  
Optical Signal ◽  
Transmission System ◽  
Signal To Noise ◽  
Dense Wavelength Division Multiplexing ◽  
Wavelength Division ◽  
Noise Ratio

In this paper, we propose an optical transmission system of 128 quadrature amplitude modulation for dense wavelength division multiplexing. In such a system, Gaussian optical filtering is used to get an appropriate photonic carrier. Theoretical analysis and simulation computation show that the modulated multi-carrier photonic signals with the wavelength spacing of 0.7 nm can transmit for over 80 km with the standard single mode fiber. Using digital signal processing algorithms to compensate the transmission impairments, the transmission rate of the single-carrier photonic signal can reach up to 904 Gbps and the spectral efficiency of the transmission can reach up to 10.33 bps/Hz. When this technology is applied to a dense wavelength division multiplexing system with N channels, the huge message capacity of N × 904 Gbps can be realized. Furthermore, we find that the bit error rate and the error vector magnitude are similarly influenced by the optical signal-to-noise ratio and the bandwidth of the Gaussian optical filter. The influence presents mostly a synchronization trend with the change of the optical signal-to-noise ratio and the bandwidth of Gaussian optical filter.

Cost Efficient 4 × 2.5 Gb/s Transparent WDM Ring Network using DML and MetroCor Fiber for Long Reach Applications

2019 ◽  
Vol 40 (1) ◽  
pp. 67-73 ◽  
Author(s):  
Anu Sheetal ◽  
Harjit Singh
Keyword(s):  
Wavelength Division Multiplexing ◽  
Signal To Noise Ratio ◽  
Cost Effective ◽  
Optical Signal ◽  
Network Node ◽  
Q Factor ◽  
Ring Network ◽  
Power Requirement ◽  
Wavelength Division ◽  
Cost Efficient

Abstract In this paper, we analyze the performance of the 4 × 2.5 Gb/s wavelength division multiplexing (WDM) transparent metro ring network comprising of one network node and eight access nodes. Here, the power requirement of 360 km ring network has been evaluated using the optical signal to noise ratio (OSNR), Q-factor, inter-symbol interference (ISI) and power penalty. The metro network utilized the cost-effective directly modulated laser (DML) and a negative dispersion fiber called MetroCor in order to give enhanced performance in terms of Q-factor. The power requirement of the network is optimized for the signals over SMF-28 and MetroCor fibers. Also, the comparison is drawn between uncompensated and compensated (with -post and -symmetrical) SMF-28 fibers in the metro environment. The excellent value of Q-factor is obtained at all the nodes. Also, the results show higher OSNR values in the metro environment. Although, smaller power penalties are detected for nodes closer to the network node, but distant nodes require higher power for better transmission.

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