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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Internetworking architectures for optical network units in a wavelength division multiplexed passive optical network.

January 2007 (has links)
Zhao, Qiguang. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2007. / Includes bibliographical references (leaves 72-76). / Abstracts in English and Chinese. / Chapter Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Telecommunications network hierarchy --- p.2 / Chapter 1.2 --- PON architectures for access networks --- p.4 / Chapter 1.2.1 --- TDM-PON --- p.5 / Chapter 1.2.2 --- WDM-PON --- p.7 / Chapter 1.3 --- Motivation of this thesis --- p.8 / Chapter 1.4 --- Outline of this thesis --- p.11 / Chapter Chapter 2 --- Previous Internetworking Architectures for Optical Network Units in Passive Optical Networks --- p.12 / Chapter 2.1 --- Introduction --- p.13 / Chapter 2.2 --- Previous internetworking architectures with ONU-broadcast capability / Chapter 2.2.1 --- Virtual ring network construction --- p.14 / Chapter 2.2.2 --- Reflection mechanism employing a FBG --- p.15 / Chapter 2.2.3 --- Loop-back mechanism in TDM-PON --- p.16 / Chapter 2.3 --- Previous internetworking architectures with ONU-VPGs formation capability --- p.17 / Chapter 2.3.1 --- E-CDMA application --- p.17 / Chapter 2.3.2 --- SCM technique --- p.18 / Chapter 2.3.3 --- Reflective waveband grouping mechanism --- p.20 / Chapter 2.4 --- Previous protection scheme for internetworking architectures --- p.21 / Chapter 2.4.1 --- Local ring protection in TDM-PON --- p.21 / Chapter 2.5 --- Summary --- p.22 / Chapter Chapter 3 --- Novel Internetworking Architecture with ONU-Broadcast Capability in a WDM-PON --- p.24 / Chapter 3.1 --- Introduction --- p.25 / Chapter 3.2 --- Network topology and wavelength assignment --- p.26 / Chapter 3.3 --- Operation principle --- p.27 / Chapter 3.4 --- Experimental demonstration --- p.31 / Chapter 3.5 --- Power budget and scalability --- p.34 / Chapter 3.6 --- Summary --- p.36 / Chapter Chapter 4 --- Novel Internetworking Architectures with ONU- VPGs Formation Capability in a WDM-PON --- p.37 / Chapter 4.1 --- Introduction --- p.38 / Chapter 4.2 --- Novel architecture with ONU-VPGs formation based on RF tone technique --- p.39 / Chapter 4.2.1 --- Introduction --- p.39 / Chapter 4.2.2 --- Network topology and wavelength assignment --- p.40 / Chapter 4.2.3 --- Media access control protocol: CSMA/CA protocol --- p.42 / Chapter 4.2.4 --- Experimental demonstration --- p.43 / Chapter 4.2.5 --- Discussion --- p.47 / Chapter 4.2.6 --- Summary --- p.49 / Chapter 4.3 --- Novel architecture with ONU-VPGs formation in optical layer --- p.51 / Chapter 4.3.1 --- Introduction --- p.51 / Chapter 4.3.2 --- Network topology and wavelength assignment --- p.51 / Chapter 4.3.3 --- Operation principle --- p.54 / Chapter 4.3.4 --- Experimental demonstration --- p.56 / Chapter 4.3.5 --- Discussion --- p.58 / Chapter 4.3.6 --- Summary --- p.65 / Chapter 4.4 --- Comparisons --- p.66 / Chapter 4.5 --- Summary --- p.67 / Chapter Chapter 5 --- Summary and Future Works --- p.68 / Chapter 5.1 --- Summary of the thesis --- p.69 / Chapter 5.2 --- Future works --- p.70 / LIST OF PUBLICATIONS --- p.71 / BIBLIOGRAPHY --- p.72
2

A multicast overlay scheme for wavelength division multiplexed passive optical networks.

January 2009 (has links)
Zhang, Yin. / Thesis submitted in: December 2008. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2009. / Includes bibliographical references (leaves 56-60). / Abstracts in English and Chinese. / Chapter Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Telecommunications network hierarchy --- p.2 / Chapter 1.2 --- PON architectures for access networks --- p.4 / Chapter 1.2.1 --- TDM-PON --- p.5 / Chapter 1.2.2 --- WDM-PON --- p.7 / Chapter 1.3 --- Data delivery mode in WDM-PON --- p.8 / Chapter 1.3.1 --- Point-to-point --- p.8 / Chapter 1.3.2 --- Broadcast --- p.9 / Chapter 1.3.3 --- Multicast --- p.10 / Chapter 1.4 --- Motivation of this thesis --- p.10 / Chapter 1.5 --- Outline of this thesis --- p.13 / Chapter Chapter 2 --- Previous Multicast Architectures in WDM-PON --- p.14 / Chapter 2.1 --- Introduction --- p.15 / Chapter 2.2 --- Previous WDM-PON architectures with multicast capability --- p.15 / Chapter 2.2.1 --- Subcarrier multiplexing --- p.16 / Chapter 2.2.2 --- All-optical based multicast enabled architecture --- p.18 / Chapter 2.3 --- Summary --- p.21 / Chapter Chapter 3 --- A Multicast enabled WDM-PON Architecture Using ASK-DPSK Orthogonal Modulation --- p.23 / Chapter 3.1 --- Introduction --- p.24 / Chapter 3.2 --- System architecture --- p.25 / Chapter 3.3 --- Experimental Demonstration --- p.27 / Chapter 3.4 --- Discussion --- p.31 / Chapter 3.5 --- Summary --- p.36 / Chapter Chapter 4 --- A WG filtering and its suppression in quaternary ASK-DPSK based multicast enabled WDM-PON --- p.37 / Chapter 4.1 --- Introduction --- p.38 / Chapter 4.2 --- Principle of narrowband filtering --- p.38 / Chapter 4.3 --- Simulation model --- p.40 / Chapter 4.4 --- Simulation results and discussion --- p.42 / Chapter 4.4.1 --- Different extinction ratios --- p.43 / Chapter 4.4.2 --- Different AWG filter shape and bandwidth --- p.47 / Chapter 4.5 --- Summary --- p.50 / Chapter Chapter 5 --- Summary and Future Works --- p.51 / Chapter 5.1 --- Summary of the thesis --- p.52 / Chapter 5.2 --- Future works --- p.53 / List of Publications --- p.55 / BIBLIOGRAPHY --- p.56
3

Dynamic Resource Provisioning and Survivability Strategies in Optical Networks

Ahmed, Jawwad January 2013 (has links)
Optical networks based on Wavelength Division Multiplexing (WDM) technology show many clear benefits in terms of high capacity, flexibility and low power consumption. All these benefits make WDM networks the preferred choice for today’s and future transports solutions which are strongly driven by a plethora of emerging online services. In such a scenario, capability to provide high capacity during the service provisioning phase is of course very important, but it is not the only requirement that plays a central role. Traffic dynamicity is another essential aspect to consider because in many scenarios, e.g., in the case of real time multimedia services, the connections are expected to be provisioned and torn down quickly and relatively frequently. High traffic dynamicity may put a strain on the network control and management operations (i.e., the overhead due to control message exchange can grow rapidly) that coordinate any provisioning mechanisms. Furthermore, survivability, in the presence of new failure scenarios that goes beyond the single failure assumption, is still of the utmost importance to minimize the network disruptions and data losses. In other words, protection against any possible future failure scenario where multiple faults may struck simultaneously, asks for highly reliable provisioning solutions. The above consideration have a general validity i.e., can be equally applied to any network segment and not just limited to the core part. So, we also address the problem of service provisioning in the access paradigm. Long reach Passive Optical Networks (PONs) are gaining popularity due to their cost, reach, and bandwidth advantages in the access region. In PON, the design of an efficient bandwidth sharing mechanism between multiple subscribers in the upstream direction is crucial. In addition, Long Reach PONs (LR-PONs) introduces additional challenges in terms of packet delay and network throughput, due to their extended reach. It becomes apparent that effective solutions to the connection provisioning problem in both the core and access optical networks with respect to the considerations made above can ensure a truly optimal end-to-end connectivity while making an efficient usage of resources. The first part of this thesis focuses on a control and management framework specifically designed for concurrent resource optimization in WDM-based optical networks in a highly dynamic traffic scenario. The framework and the proposed provisioning strategies are specifically designed with the objective of: (i) allowing for a reduction of the blocking probability and the control overhead in a Path Computation Element (PCE)-based network architecture, (ii)  optimizing resource utilization for a traffic scenario that require services with diverse survivability requirements which are achieved by means of  dedicated and shared path-protection, and (iii) designing provisioning mechanism that guarantees high connection availability levels in Double Link Failures (DLF) scenarios. The presented results show that the proposed dynamic provisioning approach can significantly improve the network blocking performance while making an efficient use of primary/backup resources whenever protection is required by the provisioned services. Furthermore, the proposed DLF schemes show good performance in terms of minimizing disruption periods, and allowing for enhanced network robustness when specific services require high connection availability levels. In the second part of this thesis, we propose efficient resource provisioning strategies for LR-PON. The objective is to optimize the bandwidth allocation in LR-PONs, in particular to: (i) identify the performance limitations associated with traditional (short reach) TDM-PON based Dynamic Bandwidth Allocation (DBA) algorithms when employed in long reach scenarios, and (ii) devise efficient DBA algorithms that can mitigate the performance limitations imposed by an extended reach. Our proposed schemes show noticeable performance gains when compared with conventional DBA algorithms for short-reach PON as well as specifically devised approaches for long reach. / <p>QC 20130520</p>
4

Optimization of passive optical network planning for fiber-to-the-home applications / Samuel Pieter van Loggerenberg

Van Loggerenberg, Samuel Pieter January 2013 (has links)
Passive optical networks (PONs) are point-to-multipoint networks where a single Central Office (CO) is connected to a number of downstream Optical Network Units (ONUs) via a single optical fiber by splitting the optical signal with passive splitters. Due to technology advances and increasing bandwidth requirements, these networks have moved to last mile deployment, also known as fiber-to-the-home (FTTH). The planning of these PONs are traditionally done by hand, but automated methods can be used to decrease deployment costs and planning time. Even though a number of methods have been proposed to address this problem through the solving of integer linear programming (ILP) models, they suffer from limited availability, inaccuracies and limited scalability due to the problem complexity. This dissertation focusses on improving the accuracy of these models as well as improving scalability to a point where large-scale problems can be solved feasibly. To address this, a basic model is implemented to capture the network structure and verified accordingly. Results show this model can be solved quickly, but has large discrepancies with real-world plans. Refinements in the form of fiber duct sharing, network constraints, multiple splitter types and economies of scale among others are then incorporated into a refined model and solved. Analysis of the experimental results indicates improved accuracy and lower deployment costs, at the expense of increasing computation effort considerably. Heuristic techniques are then examined to improve computational performance, including an elementary heuristic (ELEM), the Branch Contracting Algorithm (BCA) and problem decomposition. It is demonstrated that through the use of k-means clustering, the refined model can be solved in a fraction of the time while keeping deployment costs comparably low. / Thesis (MIng (Computer and Electronic Engineering))--North-West University, Potchefstroom Campus, 2013
5

Optimization of passive optical network planning for fiber-to-the-home applications / Samuel Pieter van Loggerenberg

Van Loggerenberg, Samuel Pieter January 2013 (has links)
Passive optical networks (PONs) are point-to-multipoint networks where a single Central Office (CO) is connected to a number of downstream Optical Network Units (ONUs) via a single optical fiber by splitting the optical signal with passive splitters. Due to technology advances and increasing bandwidth requirements, these networks have moved to last mile deployment, also known as fiber-to-the-home (FTTH). The planning of these PONs are traditionally done by hand, but automated methods can be used to decrease deployment costs and planning time. Even though a number of methods have been proposed to address this problem through the solving of integer linear programming (ILP) models, they suffer from limited availability, inaccuracies and limited scalability due to the problem complexity. This dissertation focusses on improving the accuracy of these models as well as improving scalability to a point where large-scale problems can be solved feasibly. To address this, a basic model is implemented to capture the network structure and verified accordingly. Results show this model can be solved quickly, but has large discrepancies with real-world plans. Refinements in the form of fiber duct sharing, network constraints, multiple splitter types and economies of scale among others are then incorporated into a refined model and solved. Analysis of the experimental results indicates improved accuracy and lower deployment costs, at the expense of increasing computation effort considerably. Heuristic techniques are then examined to improve computational performance, including an elementary heuristic (ELEM), the Branch Contracting Algorithm (BCA) and problem decomposition. It is demonstrated that through the use of k-means clustering, the refined model can be solved in a fraction of the time while keeping deployment costs comparably low. / Thesis (MIng (Computer and Electronic Engineering))--North-West University, Potchefstroom Campus, 2013
6

Estudo e simulação da modulação OFDM aplicada em redes ópticas de nova geração = Review and simulation of OFDM modulation applied in next generation optical network / Review and simulation of OFDM modulation applied in next generation optical network

Hoshino, Felipe Koji Godinho, 1989- 22 August 2018 (has links)
Orientador: Rangel Arthur / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Tecnologia / Made available in DSpace on 2018-08-22T06:36:42Z (GMT). No. of bitstreams: 1 Hoshino_FelipeKojiGodinho_M.pdf: 3730881 bytes, checksum: d6cd57d6d8286fe95b3166c35de77d73 (MD5) Previous issue date: 2013 / Resumo: O aumento exponencial no tráfego mundial de dados tem imposto inúmeros desafios para os sistemas de telecomunicações. Há um compromisso entre o interesse das operadoras de telecomunicações, de aumentar a receita líquida, e dos clientes, de aumentar a taxa de transmissão de dados. Com isso, diversas soluções têm sido discutidas no âmbito das comunicações ópticas. Uma das propostas estudadas é a aplicação mais intensa do processamento digital de sinais. Dessa forma, neste trabalho foi estudado e simulado o uso da modulação OFDM (Orthogonal Frequency Division Multiplexing) nas redes ópticas de nova geração. Também foi simulado um modem OFDM em linguagem VHDL (Very High Speed Integrated Circuit Hardware Description Language) sendo esta uma etapa do projeto de novos equipamentos. Como prova de conceito, analisou-se o desempenho de redes ópticas por meio do software OptiSystem. De maneira geral, os resultados obtidos foram satisfatórios para demonstrar a viabilidade da modulação OFDM em redes ópticas de nova geração / Abstract: The exponential increase in global data traffic has imposed many challenges for telecommunication systems. There is a trade-off between the interest of telecom operators to increase the net revenue and the customers to increase the transmission data rate. Several solutions have been discussed in optical communications field. One approach is the more intense application of the digital signal processing. Thus, in this work is presented a review and simulations of OFDM modulation (Orthogonal Frequency Division Multiplexing) in the next generation networks. It was also simulated a OFDM modem in VHDL (Very High Speed Integrated Circuit Hardware Description Language) which for a new equipment design. The performance of optical networks has been examinated with OptiSystem software as o proof of concept. In general, the results obtained were satisfactory to show the feasibility of OFDM modulation in the next generation networks / Mestrado / Tecnologia e Inovação / Mestre em Tecnologia
7

Analysis of the performance of Hybrid TWDM Passive OpticalNetworks (NG-PON2)

Khan, Rameez Ahmed January 2021 (has links)
In this study, a review of research literature has been carried out to investigate Hybrid Time and wavelength Division Multiplexing techniques with respect to reach, split ratio, and speed of the network. This was done to overcome challenges presented by Passive Optical Networks, such as the reach and the high split ratio. A comparison of different methods clarifies that Hybrid PassiveOptical Networks have a high power-budget that ensure efficient signal transmission. The Optisys software has been used to analyze the performance of the different techniques.
8

Novel techniques for Rayleigh noise suppression and multicast transmission in wavelength division multiplexed passive optical networks. / CUHK electronic theses & dissertations collection

January 2011 (has links)
Centralized light source (CLS) at the central office is an attractive solution for low-cost implementation of WDM-PON, as it eliminates the need of wavelength-specific transmitters and wavelength management at the optical network units (ONU). CLS can be realized by either a carrier-distributed scheme or a remodulation scheme. In both schemes, however, the upstream signal is susceptible to the interferometric crosstalk induced by the beating between the upstream signal and the back-reflected light due to the intrinsic Rayleigh Backscattering (RB), both of which are of the same wavelength. We propose and demonstrate a simple and novel scheme to suppress the RB noise in the carrier-distributed WDM-PON. Differential phase-shift keying (DPSK) is used as the upstream modulation format and the destructive port of the delay-interferometer (DI) is employed to demodulate the upstream DPSK signal. As the spectrum of RB towards the OLT is narrow due to the very narrow spectrum of the distributed carrier, the RB noise can be considerably rejected by the notch filter-like destructive port of the DI at the OLT, which is used simultaneously to demodulate the upstream DPSK signal. The scheme can also be extended to the application in the remodulation-based WDM-PON, as long as the downstream signal has a narrow spectrum (i.e. via reducing downstream modulation depth). A unique feature of the DPSK signal with reduced modulation depth (RMD-DPSK) is that it can be demodulated by DI's destructive port without extinction ratio (ER) degradation, whereas the demodulated signal from DI's destructive port has a very low ER and can be used as the source for upstream remodulation. We also proposed a novel offset-Manchester coding to suppress Rayleigh noise in electrical domain via a postdetection high-pass filter. / Foreseeing the rapidly growing demand for multimedia services and the trend of service convergence, the penetration of optical fiber in access network is an ultimate solution to break the last-mile bottleneck imposed by the 100-year-old copper network. One of the most promising solutions to realize optical access is the passive optical network (PON), in which the network infrastructure is shared by many subscribers and has no active elements between the central office and the customer. Thus a PON requires neither electrical power nor active management, leading to effective reduction in operational expenses. Time-division-multiplexed passive optical networks (TDM-PONs) such as Ethernet PON (EPON) and Gigabit PON (GPON) are being widely deployed in current fiber-based access networks for providing broadband access, offering triple-play services including video, data and voice. In the near future, wavelength-division-multiplexed passive optical network (WDM-PON) can be the enabler of the next-generation optical broadband access that requires large dedicated and symmetric bandwidth, data privacy, and upgrade flexibility. TDM-PONs also can benefit from WDM technologies for capacity upgrade. / With more diverse multimedia and data services available for broadband access, the access network has to be flexible enough to cope with various data or video delivery such as broadcast/multicast services, in addition to the point-to-point traffic. Multicast is more attractive, compared to broadcast, as it allows selective control of the connection for each subscriber individually. Multicast can be easily realized in TDM-PONs as it employs power-splitting at the remote node (RN). However, it is more challenging in WDM-PONs, due to the dedicated connection between the optical line terminal (OLT) and each ONU. Many studies have been carried out to solve this problem. The prior schemes either need relatively complicated multicast control and/or cannot support future proof 10-Gb/s symmetric point-to-point (PtP) transmission. We proposed a novel multicast control scheme for a WDM-PON with 10-Gb/s symmetric bit rate. The multicast data encoded in DPSK format is superimposed onto all PtP channels modulated in inverse return-to-zero format. With an athermal Dr being used at the ONU to demodulate the DPSK signal, the multicast data can be effectively disabled by slight detuning the laser wavelength at OLT, which has negligible effect on the PtP data. The proposed scheme differs from all the previous schemes in that, the multicast control is realized via the inherent wavelength management of WDM systems, rather than via any other additional adjustment such as ER, synchronization, and polarization. v / Xu, Jing. / Adviser: Lian-Kuan Chen. / Source: Dissertation Abstracts International, Volume: 73-06, Section: B, page: . / Thesis (Ph.D.)--Chinese University of Hong Kong, 2011. / Includes bibliographical references. / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Electronic reproduction. [Ann Arbor, MI] : ProQuest Information and Learning, [201-] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Abstract also in Chinese.
9

Photonic devices and subsystems for future WDM PON and radio over fiber technologies. / CUHK electronic theses & dissertations collection

January 2010 (has links)
Besides colorless ONUs, we investigate potentially low cost, high speed vertical-cavity-surface-emitting lasers (VCSELs) for use in future access networks. VCSELs are attractive because they may meet the stringent size, power dissipation and cost constraints of access network components. We carry out experiments to demonstrate that up to 20 Gb/s direct modulation of long wavelength VCSEL is possible and evaluate their performance as high-speed transceivers. / In order to reduce the complexity and costs of ONU transceiver, we propose a scheme based on a nonreciprocal optical modulator and a linear loop mirror for receiving downstream and sending upstream data We show that the nonreciprocity of traveling wave electrodes can selectively impress signal modulation onto the reflected upstream signals only. Monolithic integrated transceivers may thus remodulate downstream signals for upstream data transmission without needing integrated optical circulators. The proposed ONU is thus compatible with monolithic integration. / In this thesis, we describe our research on photonic devices and subsystems for future access networks. Since optical network units (ONUs) are the most cost-sensitive parts, we first investigate the use of advanced modulation format in colorless ONU structure. We implement a scheme which uses dark return-to-zero (DRZ) for downstream transmission and remodulation of it using a differential-phase-shift-keying (DPSK) for upstream both at 10 Gb/s. We also experimentally demonstrate silicon microring based optical frequency discriminators for use in demodulating DPSK and differential-quadrature-phase-shift-keying (DQPSK) signals. We show that the scheme is robust to variations in bit-rates in contrast with conventional Mach-Zehnder delay interferometer scheme. / Internet traffic has undergone tremendous growth in the past decades and has already penetrated into the daily lives of the general population. Demand for new high bandwidth services is beginning to drive the deployment of optical fiber-based access networks to solve the so-called last mile bottleneck around the world. Passive optical networks (PON) are attractive because there are no active components in the transmission line, thus reducing operational and deployment costs. Time-division-multiplexing (TDM) used in currently deployed PON, in which the bandwidth is shared among the users by time domain multiplexing, does not fully utilize the bandwidth potential of optical fibers and will not be able to satisfy the bandwidth demand in access networks in the near future. Among the advanced multiplexing techniques, wavelength-division-multiplexing (WDM) PON is a good candidate technology for providing sustained bit-rates beyond 10 Gb/s in access networks. However, reduction of costs in WDM PON remains a key challenge for their practical deployment. / Wired and wireless hybrid optical access networks are also investigated. Radio-over-fiber is one low-cost approach to deliver broadband wireless services, in which radio signals at the carrier frequency are delivered over optical networks from a central office to remote antenna base stations. Generation of high frequency carrier and radio frequency fading are the main research challenges. We propose and demonstrate frequency upconversion based on frequency doubling and quadrupling. Novel wired and wireless hybrid subsystems that mitigate millimeter-wave signal distortion are also demonstrated. / Xu, Lin. / Adviser: H. K. Tsang. / Source: Dissertation Abstracts International, Volume: 72-04, Section: B, page: . / Thesis (Ph.D.)--Chinese University of Hong Kong, 2010. / Includes bibliographical references. / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Electronic reproduction. Ann Arbor, MI : ProQuest Information and Learning Company, [200-] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Abstract also in Chinese.
10

Characterization and design of multifunction photonic devices for next-generation fiber-to-the-home optical network units

Schrenk, Bernhard 28 April 2011 (has links)
El estudio e investigación en el campo de las redes ópticas de acceso han sido fomentadas en años recientes debido a la continua migración de Servicios multimedia que son ofrecidos a través de Internet. Aunque los dispositivos utilizados para implementar Fiber-to-the-Home (fibra a casa), que reemplazan las soluciones tradicionales basadas en cable de cobre, están basadas aún en micro-óptica, se puede prever una evolución hacia integración fotónica. Todavía queda la pregunta acerca de los diseños necesarios para este paso importante de integración, que debe ser optimizado en términos del desempeño de transmisión, eficiencia energética y costo con el fin de lograr todos los requerimientos de las redes fotónicas de siguiente generación. Como elemento más crítico en las redes de acceso ópticas es el equipo en los clientes, este trabajo se centra en éste. Los temes cubiertos abarcan una gama amplia e incluyen: el reciclado de longitudes de onda para transmisión de datos en full-dúplex a través de una sola frecuencia óptica; la generación de formatos de modulación avanzados con moduladores semiconductores de bajo costo y factor pequeño de integración; soporte de amplificación óptica a través de técnicas de sembrado y el soporte de funcionalidades de capes superiores en la capa física. Después de la prueba principal de las técnicas propuestas, se resaltan los beneficios, impedimentos y caminos de reemplazo hacia sistemas fotónicos multifuncionales a través de casos de estudio. Por su parte, los diseños más representativos se profundizan más sobre todo por su posibilidad de ser integrados fotónicamente. / Optical access technology has experienced a boost in the last years, thanks to the continuously migrating multimedia services that are offered over the internet. Though the devices used for deploying Fiber-to-the-Home instead of traditional copper-based solutions are still based on micro-optics, an evolution towards photonic integration can be foreseen. What remains is the question about the exact designs for this important step of integration, which should be optimized in terms of transmission performance, energy efficiency and cost to address all requirements of next-generation photonic networks. As the most critical element in optical access, the customer premises equipment is in primary focus of this discussion. The covered topics span over a wide range and include wavelength recycling for full-duplex data transmission on a single optical frequency, the generation of advanced modulation formats with low-cost semiconductor modulators with small form factor, support for optical amplification by means of seeding techniques and the support of higher layer functionality at the physical layer. Next to the principal proof of the proposed techniques, the benefits, impediments and upgrade paths towards multifunctional photonic systems are highlighted in different case studies, while the most representative designs are further discussed in their capability of being photonically integrated.

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