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An optical access network with LTE, optical data, and CATV signals is experimentally studied. Rx sensitivities of −27.5 dBm, −26 dBm, and −24 dBm were obtained at bitrates of 1.25 Gb/s, 2.5 Gb/s, and 10 Gb/s at BER=10−4; whereas Rx optical power of −27 dBm is needed at an EVM of 28.2% for LTE. The minimum spectral separation is also measured showing the effect of the high power CATV on the other two signals.

En este artículo se analiza el impacto del ancho de línea en el desempeño de una red de acceso óptica en la que se emplea el formato de modulación DPSK. Se demostró, mediante simulaciones, el efecto del ancho de línea sobre la BER (Bit Error Rate). Se analizó el desempeño para diferentes velocidades de transmisión y valores de dispersión en la fibra óptica. DPSK es un formato simple y de menor costo comparado con el uso de detección coherente, DPSK. Se encontró que puede emplearse un mayor ancho de línea al incrementar la tasa de bits, lo que significa un menor costo de implementación. Se propone a DPSK como el siguiente paso en la actualización de la red de acceso actual que emplea modulación en intensidad. // over the performance of an optical link in an optical access network that employs the DPSK modulation format. We use simulations to measure the BER when the linewidth of the optical transmitter changes. We analyze the link performance with different data bit rates and different dispersion values of the optical fiber. DPSK is a cheaper and simpler solution compared with coherent detection. We found that is required a higher linewidth when the bit rate increases. This implies a lower cost of implementation of the access network. In this case, DPSK could be the next stage to upgrade the intensity modulation format used in the access networks.

QPSK modulation format with electronic compensation is an alternative to increase the capacity and reach in the next generation passive optical networks (NG-PON), in response to demanding services and applications. We perform simulations to compare the performance of two electronic compensation techniques Constant Modulus Algorithm (CMA) and Backpropagation, in a NG-PON with QPSK modulation and coherent detection for the compensation of the chromatic dispersion. We use CMA in the access network to increase the data bit rate up to 40 Gb/s and the reach up to 33.5 km, reducing the computational requirements compared with Backpropagation. Resumen El formato de modulación QPSK junto a la compensación electrónica es una alternativa para incrementar la capacidad y alcance en las redes ópticas pasiva de próxima generación (NG-PON), en respuesta a la demanda de servicios y aplicaciones. En este documento se presenta la comparación mediante simulaciones del desempeño de dos técnicas de compensación electrónica: el Algoritmo de Módulo Constante (CMA) y el algoritmo Backpropagation en una red NG-PON con modulación QPSK y detección coherente para la compensación de la dispersión cromática de la fibra óptica. Se analiza el uso del algoritmo CMA en la red de acceso con el fin de incrementar la velocidad de transmisión hasta 40 Gb/s y el alcance hasta 33.5 km, reduciendo la complejidad computacional en comparación con el algoritmo Backpropagation.

When you have to choose what type of modulation is selected for an optical system, you must also decide the type of receptor to use and the cost benefit of its use. This paper presents the evaluation of two formats (BPSK and DPSK) with coherent detector and coherent differential detector for each format respectively, in order to determine which of the two types of receptor and modulation has better performance in PON access networks has 10Gbps.

With the increasing amount of information that is demanding by fixed and mobile users through the multiservice networks, the deployment of the optical segment in the access network is a critical issue, with impact in the cost and performance of the overall network. While TDM-Passive optical network (PON) is standardized, hybrid WDM/TDM-PON is now clearly seen as the next generation trend in the multiservice access. In this work we propose a dimensioning scheme for the deployment of multiservice hybrid WDM/TDM-PONs, using a heuristic method.

The increasing demand of fixed and mobile applications, and considering that smart grid imposes new requirements to the access networks, in this paper we present an optical access architecture to support home multiservice including smart grid applications. We propose a migration path based in a WDM passive optical network (PON) architecture for the next 10 years. Moreover, we compare the performance of each stage in terms of data bit rate requirements, bit error rate (BER) and jitter.

In this paper we present performance results of a Gigabit-Passive Optical Network (G-PON) for different alternatives of implementation with data bit rates of 1.25, 2.5 and 10 Gbps in the downlink. The presented results allow to determine the kind of transmitter and receiver to use affecting the implementation cost of the access network.