Pub Date : 2014-06-04DOI: 10.1109/COLCOMCON.2014.6860429
R. Hincapié, L. B. Agudelo, Cristina Gómez, Alexander Galvis Quintero, Robert Miller
In this paper we propose a spectrum broker scheme that uses a distributed algorithm for control and resource allocation in a small cell heterogeneous network. We analyze the performance of the distributed algorithm proposed in terms of capacity. The influence of network parameters as the number of users, the size of the small cells and the number of small cells, on the performance of the algorithm is analyzed in order to determine the conditions where the implementation of a distributed spectrum broker is feasible. We probe that a distributed spectrum broker is feasible of real implementation and its performance is close to the ideal and traditional centralized decision algorithms.
{"title":"Capacity analysis for distributed spectrum brokers in heterogeneous networks","authors":"R. Hincapié, L. B. Agudelo, Cristina Gómez, Alexander Galvis Quintero, Robert Miller","doi":"10.1109/COLCOMCON.2014.6860429","DOIUrl":"https://doi.org/10.1109/COLCOMCON.2014.6860429","url":null,"abstract":"In this paper we propose a spectrum broker scheme that uses a distributed algorithm for control and resource allocation in a small cell heterogeneous network. We analyze the performance of the distributed algorithm proposed in terms of capacity. The influence of network parameters as the number of users, the size of the small cells and the number of small cells, on the performance of the algorithm is analyzed in order to determine the conditions where the implementation of a distributed spectrum broker is feasible. We probe that a distributed spectrum broker is feasible of real implementation and its performance is close to the ideal and traditional centralized decision algorithms.","PeriodicalId":346697,"journal":{"name":"2014 IEEE Colombian Conference on Communications and Computing (COLCOM)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123672634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-06-04DOI: 10.1109/COLCOMCON.2014.6860407
Saitel Daniela Agudelo Sanabria, Vladimir Ricardo Pineda Bonilla, Juan Miguel David Becerra Tobar
Impedance characterization is one of the most important measurements required for the correct design, construction and performance of couplers, modems and many others common devices in the communications area. It is also important for the correct estimation and calculation of the incidence of certain factors in the development of research about power lines. Previous research about power line communications (PLC) have shown that the line behavior changes according to the frequency, wiring practice, topology and loads plugged in, among other factors. The variable behavior of the low voltage power line makes it a harsh environment when it is used as a channel for communication applications. Characterization is an important issue because the knowledge of the conditions that regulate the performance of the line is a useful tool to provide solutions and get significant improvements. This paper presents a general test methodology suitable to measure the line impedance for a wide frequency spectrum. The proposed method can be applied to different deployed power networks. The results obtained for a specific line are shown as an example of its application in a real-life environment.
{"title":"Test methodology for impedance characterization of a low voltage power line channel for broadband communication applications","authors":"Saitel Daniela Agudelo Sanabria, Vladimir Ricardo Pineda Bonilla, Juan Miguel David Becerra Tobar","doi":"10.1109/COLCOMCON.2014.6860407","DOIUrl":"https://doi.org/10.1109/COLCOMCON.2014.6860407","url":null,"abstract":"Impedance characterization is one of the most important measurements required for the correct design, construction and performance of couplers, modems and many others common devices in the communications area. It is also important for the correct estimation and calculation of the incidence of certain factors in the development of research about power lines. Previous research about power line communications (PLC) have shown that the line behavior changes according to the frequency, wiring practice, topology and loads plugged in, among other factors. The variable behavior of the low voltage power line makes it a harsh environment when it is used as a channel for communication applications. Characterization is an important issue because the knowledge of the conditions that regulate the performance of the line is a useful tool to provide solutions and get significant improvements. This paper presents a general test methodology suitable to measure the line impedance for a wide frequency spectrum. The proposed method can be applied to different deployed power networks. The results obtained for a specific line are shown as an example of its application in a real-life environment.","PeriodicalId":346697,"journal":{"name":"2014 IEEE Colombian Conference on Communications and Computing (COLCOM)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122623086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-06-04DOI: 10.1109/COLCOMCON.2014.6860403
Ligia Rodrigues Prete, C. M. Schweitzer, A. Shinoda, Rogerio Leao Santos de Oliveira
Computer networks have evolved due to new trends in the society's needs since their emergence as a way of providing remote access and sharing of computational resources. The architecture inflexibility of the computer networks presents a challenge for researchers, since their experiments can hardly be evaluated in real networks. Thus, in general, tests of new technologies are conducted on network simulators, which imply in a streamline of the reality. The paradigm of Software Defined Networks (SDN) and OpenFlow architecture, offer a way for the implementation of a programmable network architecture, able to be implemented gradually in production networks, which offers the possibility of separating the control mechanisms of the many traffic flows served, so that a scientific experiment can be performed in a real network (adapted for SDN) without interfering with its operation. This paper contextualizes the existing problems in current computer networks, and presents the SDN network as one of the main proposals for the viability of the Internet of the Future. In this context, it is discussed the OpenFlow architecture, which allows the creation of applications for Software Defined Networks. Finally it is presented the network simulator SDN, the Mininet, which implements the OpenFlow interface in a network simulation scenario containing a controller POX with two components, one OpenFlow switch and three nodes. The main objective was to evaluate the communication and bandwidth between nodes.
{"title":"Simulation in an SDN network scenario using the POX Controller","authors":"Ligia Rodrigues Prete, C. M. Schweitzer, A. Shinoda, Rogerio Leao Santos de Oliveira","doi":"10.1109/COLCOMCON.2014.6860403","DOIUrl":"https://doi.org/10.1109/COLCOMCON.2014.6860403","url":null,"abstract":"Computer networks have evolved due to new trends in the society's needs since their emergence as a way of providing remote access and sharing of computational resources. The architecture inflexibility of the computer networks presents a challenge for researchers, since their experiments can hardly be evaluated in real networks. Thus, in general, tests of new technologies are conducted on network simulators, which imply in a streamline of the reality. The paradigm of Software Defined Networks (SDN) and OpenFlow architecture, offer a way for the implementation of a programmable network architecture, able to be implemented gradually in production networks, which offers the possibility of separating the control mechanisms of the many traffic flows served, so that a scientific experiment can be performed in a real network (adapted for SDN) without interfering with its operation. This paper contextualizes the existing problems in current computer networks, and presents the SDN network as one of the main proposals for the viability of the Internet of the Future. In this context, it is discussed the OpenFlow architecture, which allows the creation of applications for Software Defined Networks. Finally it is presented the network simulator SDN, the Mininet, which implements the OpenFlow interface in a network simulation scenario containing a controller POX with two components, one OpenFlow switch and three nodes. The main objective was to evaluate the communication and bandwidth between nodes.","PeriodicalId":346697,"journal":{"name":"2014 IEEE Colombian Conference on Communications and Computing (COLCOM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129305739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-06-04DOI: 10.1109/COLCOMCON.2014.6860397
Jaime Jarrin, P. Bernal, R. Lara-Cueva
This work presents a performance analysis among different propagation models to estimate path loss on the wireless channel for communication systems in conformance with IEEE 802.16-2009 WirelessMAN Fixed OFDM. We developed and implemented a simulator using Matlab®, this simulator considers the channel losses and reflects their effects on the physical layer. The system implementation considers different types of modulations and coding rates defined in the standard. The program allows obtaining results about path loss, transmitting power as a function of BER, and transmitting power as a function of Eb/No. The channel considers losses produced by the wireless medium with shadowing, and an AWGN channel described by a standard deviation obtained from the Eb/No produced by the transmit power. We compared Yon Soo Cho, SUI and Free Space models at 3.5 GHz to obtain the bit error probability. We determined Yon Soo Cho model shows better results for rural areas than SUI model.
本文提出了不同传播模型之间的性能分析，以估计符合IEEE 802.16-2009无线城域网固定OFDM通信系统的无线信道上的路径损耗。我们使用Matlab®开发并实现了一个模拟器，该模拟器考虑了信道损耗并反映了它们对物理层的影响。系统实现考虑了标准中定义的不同类型的调制和编码速率。该程序允许获得关于路径损耗、发射功率作为BER的函数以及发射功率作为Eb/No的函数的结果。信道考虑有阴影的无线介质产生的损耗，以及由发射功率产生的Eb/No得到的标准偏差描述的AWGN信道。我们比较了Yon Soo Cho、SUI和Free Space模型在3.5 GHz下的误码概率。我们确定Yon Soo Cho模型在农村地区比SUI模型表现出更好的结果。
{"title":"Analysis of propagation model in conformance with IEEE 802.16-2009-based fixed wireless networks","authors":"Jaime Jarrin, P. Bernal, R. Lara-Cueva","doi":"10.1109/COLCOMCON.2014.6860397","DOIUrl":"https://doi.org/10.1109/COLCOMCON.2014.6860397","url":null,"abstract":"This work presents a performance analysis among different propagation models to estimate path loss on the wireless channel for communication systems in conformance with IEEE 802.16-2009 WirelessMAN Fixed OFDM. We developed and implemented a simulator using Matlab®, this simulator considers the channel losses and reflects their effects on the physical layer. The system implementation considers different types of modulations and coding rates defined in the standard. The program allows obtaining results about path loss, transmitting power as a function of BER, and transmitting power as a function of Eb/No. The channel considers losses produced by the wireless medium with shadowing, and an AWGN channel described by a standard deviation obtained from the Eb/No produced by the transmit power. We compared Yon Soo Cho, SUI and Free Space models at 3.5 GHz to obtain the bit error probability. We determined Yon Soo Cho model shows better results for rural areas than SUI model.","PeriodicalId":346697,"journal":{"name":"2014 IEEE Colombian Conference on Communications and Computing (COLCOM)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126901984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-06-04DOI: 10.1109/COLCOMCON.2014.6860398
O. Orozco, Gonzalo Llano Ramírez
With the growth in the number of vehicles moving through the streets, high vehicular flow has become a mobility and public health problem for governmental institutions and people since time of travel, gasoline consumption, and greenhouse gas [GHG] emissions have suffered an important increase. Hereby, policies and actions are required to reduce the impact of this increase. In this context, we have developed an application for the simulation of Vehicular Ad hoc Networks [VANET] using two software applications: SUMO and OMNeT++. The application we developed optimizes fuel usage and reduces GHG emissions; showing that vehicles following a preset speed (previously studied), gasoline consumption and GHG emissions present a considerable decrease compared to vehicles not running at that speed.
{"title":"OSA: A VANET application focused in energy efficiency","authors":"O. Orozco, Gonzalo Llano Ramírez","doi":"10.1109/COLCOMCON.2014.6860398","DOIUrl":"https://doi.org/10.1109/COLCOMCON.2014.6860398","url":null,"abstract":"With the growth in the number of vehicles moving through the streets, high vehicular flow has become a mobility and public health problem for governmental institutions and people since time of travel, gasoline consumption, and greenhouse gas [GHG] emissions have suffered an important increase. Hereby, policies and actions are required to reduce the impact of this increase. In this context, we have developed an application for the simulation of Vehicular Ad hoc Networks [VANET] using two software applications: SUMO and OMNeT++. The application we developed optimizes fuel usage and reduces GHG emissions; showing that vehicles following a preset speed (previously studied), gasoline consumption and GHG emissions present a considerable decrease compared to vehicles not running at that speed.","PeriodicalId":346697,"journal":{"name":"2014 IEEE Colombian Conference on Communications and Computing (COLCOM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129074971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-06-04DOI: 10.1109/COLCOMCON.2014.6860416
M. Navarro, Yimei Li, Yao Liang
Energy efficiency is a critical factor in wireless sensor networks (WSNs). Understanding how energy is being consumed by sensor nodes allows researchers and practitioners to more effectively evaluate and optimize the development of real-world WSN applications. In WSN deployments for environmental monitoring, the external environment affects the performance of the application, influencing the energy consumed by sensor nodes. In this work, we present the energy consumption profile for an environmental monitoring WSN application deployed in an outdoor testbed. Our results reveal that significant differences exist in energy consumption between nodes with attached external sensors and ones without them, as well as the effect of network dynamics on the energy profile.
{"title":"Energy profile for environmental monitoring wireless sensor networks","authors":"M. Navarro, Yimei Li, Yao Liang","doi":"10.1109/COLCOMCON.2014.6860416","DOIUrl":"https://doi.org/10.1109/COLCOMCON.2014.6860416","url":null,"abstract":"Energy efficiency is a critical factor in wireless sensor networks (WSNs). Understanding how energy is being consumed by sensor nodes allows researchers and practitioners to more effectively evaluate and optimize the development of real-world WSN applications. In WSN deployments for environmental monitoring, the external environment affects the performance of the application, influencing the energy consumed by sensor nodes. In this work, we present the energy consumption profile for an environmental monitoring WSN application deployed in an outdoor testbed. Our results reveal that significant differences exist in energy consumption between nodes with attached external sensors and ones without them, as well as the effect of network dynamics on the energy profile.","PeriodicalId":346697,"journal":{"name":"2014 IEEE Colombian Conference on Communications and Computing (COLCOM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129020431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-06-04DOI: 10.1109/COLCOMCON.2014.6860432
G. Pedraza-Garcia, H. Astudillo, D. Correal
Architectural tactics are decisions to efficiently solve quality attributes in software architecture. Security is a complex quality property due to its strong dependence on the application domain. However, the selection of security tactics in the definition of software architecture is guided informally and depends on the experience of the architect. This study presents a methodological approach to address and specify the quality attribute of security in architecture design applying security tactics. The approach is illustrated with a case study about a Tsunami Early Warning System.
{"title":"A methodological approach to apply security tactics in software architecture design","authors":"G. Pedraza-Garcia, H. Astudillo, D. Correal","doi":"10.1109/COLCOMCON.2014.6860432","DOIUrl":"https://doi.org/10.1109/COLCOMCON.2014.6860432","url":null,"abstract":"Architectural tactics are decisions to efficiently solve quality attributes in software architecture. Security is a complex quality property due to its strong dependence on the application domain. However, the selection of security tactics in the definition of software architecture is guided informally and depends on the experience of the architect. This study presents a methodological approach to address and specify the quality attribute of security in architecture design applying security tactics. The approach is illustrated with a case study about a Tsunami Early Warning System.","PeriodicalId":346697,"journal":{"name":"2014 IEEE Colombian Conference on Communications and Computing (COLCOM)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131818372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-06-04DOI: 10.1109/COLCOMCON.2014.6860415
L. F. Lagunes-Aranda, Luis E. Carrion-Rivera, G. Zamora-Mejía, Ruben A. Gonzalez-Benitez, A. G. Martinez-Lopez, J. Martínez-Castillo
Theft and exchange of newborns have rise its numbers becoming this topic a big issue that must be face up by hospitals. Closed Circuit Television (CCTV) surveillance is one of the most used solutions. However, CCTV needs human operator and a highly implementation cost. Ultra High Frequency Radio IDentification (UHF RFID) brings an easy and cheap solution to this problematic because of automatic real time control and monitoring of passive elements called tags. This work presents the design of two UHF RFID meander line antennas for newborn hospital monitoring applications. The first antenna is implemented on printed circuit board (PCB) obtaining a read range of 8.25m, a read range improvement of 2.25m is observed compared with commercially available passive systems. The second antenna is fabricated on Rogers Duroid 5880 flexible substrate allowing adhesion to any surface shape, a read range of 6m is obtained. Comercially available system used as reference is composed by a reader CSL 461 and passive tag Confidex Carrier. In order to illustrate this improvement, a monitoring system layout prototype is proposed.
{"title":"Improvement in read range of an UHF RFID newborn hospital monitoring system using meander line antennas","authors":"L. F. Lagunes-Aranda, Luis E. Carrion-Rivera, G. Zamora-Mejía, Ruben A. Gonzalez-Benitez, A. G. Martinez-Lopez, J. Martínez-Castillo","doi":"10.1109/COLCOMCON.2014.6860415","DOIUrl":"https://doi.org/10.1109/COLCOMCON.2014.6860415","url":null,"abstract":"Theft and exchange of newborns have rise its numbers becoming this topic a big issue that must be face up by hospitals. Closed Circuit Television (CCTV) surveillance is one of the most used solutions. However, CCTV needs human operator and a highly implementation cost. Ultra High Frequency Radio IDentification (UHF RFID) brings an easy and cheap solution to this problematic because of automatic real time control and monitoring of passive elements called tags. This work presents the design of two UHF RFID meander line antennas for newborn hospital monitoring applications. The first antenna is implemented on printed circuit board (PCB) obtaining a read range of 8.25m, a read range improvement of 2.25m is observed compared with commercially available passive systems. The second antenna is fabricated on Rogers Duroid 5880 flexible substrate allowing adhesion to any surface shape, a read range of 6m is obtained. Comercially available system used as reference is composed by a reader CSL 461 and passive tag Confidex Carrier. In order to illustrate this improvement, a monitoring system layout prototype is proposed.","PeriodicalId":346697,"journal":{"name":"2014 IEEE Colombian Conference on Communications and Computing (COLCOM)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132844376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-06-04DOI: 10.1109/COLCOMCON.2014.6860424
Jesse Padilla Agudelo, H. C. Castro Barrera
This paper describes an approach for a congestion charge system architecture based on a model of Internet of Things. This proposal is made in order to address the problems caused by the growth of traffic congestion on road infrastructure that supports a city. The vision of the architecture is the divided in two components: the vehicular detection component and the processing and analysis component. The first of these is related to the network of distributed and autonomous hardware used to monitor and detect vehicles that enter to a cost congestion area. The second component is responsible for the logical operations business of the system. The document shows advantages of the model of Internet of Things for a Congestion Charges System and other associated challenges.
{"title":"Approach for a Congestion Charges System supported on Internet of Things","authors":"Jesse Padilla Agudelo, H. C. Castro Barrera","doi":"10.1109/COLCOMCON.2014.6860424","DOIUrl":"https://doi.org/10.1109/COLCOMCON.2014.6860424","url":null,"abstract":"This paper describes an approach for a congestion charge system architecture based on a model of Internet of Things. This proposal is made in order to address the problems caused by the growth of traffic congestion on road infrastructure that supports a city. The vision of the architecture is the divided in two components: the vehicular detection component and the processing and analysis component. The first of these is related to the network of distributed and autonomous hardware used to monitor and detect vehicles that enter to a cost congestion area. The second component is responsible for the logical operations business of the system. The document shows advantages of the model of Internet of Things for a Congestion Charges System and other associated challenges.","PeriodicalId":346697,"journal":{"name":"2014 IEEE Colombian Conference on Communications and Computing (COLCOM)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122074773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-06-04DOI: 10.1109/COLCOMCON.2014.6860409
Jesus E. Madronero, A. Cárdenas, J. Botía
The performance of ultra-short pulse propagation through single-mode fiber (SMF) is degraded due to linear and nonlinear phenomena like fiber loss, group velocity dispersion (GVD), and self-phase modulation (SPM). Since diffraction phenomena and transmittance functions of the optical devices affect the magnitude and phase of a propagated ultra-short pulse, it is necessary to build-up an approach in order to optimize such limitations. In the paper, a simulation of Gaussian pulse propagation through SMF and 2-f line spatial configuration is presented. The effects of GVD and SPM are generated by split-step Fourier method (SSFM) to solve the nonlinear Schrodinger equation (NLSE). For the spatial configuration, Fresnel's approximation and the transmittance functions for optical elements such as gratings and lens are considered. To manipulate and recover spectral phases of the ultra-short pulse, an approach applied over a liquid crystal spatial light modulator (LC-SLM) as a phase modulator and spectral filter is proposed. The preliminary results show that the ultra-short pulse propagation in SMF is affected in presence of GVD and SPM just at the same time. In the second simulation, the interaction for a propagated ultra-short pulse through a 2f-line spatial configuration is described. The input spectral phases were manipulated by a LC-SLM at the Fourier's plane, obtaining a flat phase. In the third simulation, the spectral components from a pulse were filtered by fixed masks, implemented on the LC-SLM as a low-pass and band-pass filter, respectively.
{"title":"Methodology of LC-SLM for filtering and phase spectral recovering of GVD and SPM in the ultra-short pulse propagation through single-mode fiber","authors":"Jesus E. Madronero, A. Cárdenas, J. Botía","doi":"10.1109/COLCOMCON.2014.6860409","DOIUrl":"https://doi.org/10.1109/COLCOMCON.2014.6860409","url":null,"abstract":"The performance of ultra-short pulse propagation through single-mode fiber (SMF) is degraded due to linear and nonlinear phenomena like fiber loss, group velocity dispersion (GVD), and self-phase modulation (SPM). Since diffraction phenomena and transmittance functions of the optical devices affect the magnitude and phase of a propagated ultra-short pulse, it is necessary to build-up an approach in order to optimize such limitations. In the paper, a simulation of Gaussian pulse propagation through SMF and 2-f line spatial configuration is presented. The effects of GVD and SPM are generated by split-step Fourier method (SSFM) to solve the nonlinear Schrodinger equation (NLSE). For the spatial configuration, Fresnel's approximation and the transmittance functions for optical elements such as gratings and lens are considered. To manipulate and recover spectral phases of the ultra-short pulse, an approach applied over a liquid crystal spatial light modulator (LC-SLM) as a phase modulator and spectral filter is proposed. The preliminary results show that the ultra-short pulse propagation in SMF is affected in presence of GVD and SPM just at the same time. In the second simulation, the interaction for a propagated ultra-short pulse through a 2f-line spatial configuration is described. The input spectral phases were manipulated by a LC-SLM at the Fourier's plane, obtaining a flat phase. In the third simulation, the spectral components from a pulse were filtered by fixed masks, implemented on the LC-SLM as a low-pass and band-pass filter, respectively.","PeriodicalId":346697,"journal":{"name":"2014 IEEE Colombian Conference on Communications and Computing (COLCOM)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129710397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：