Showing papers by "Victor Polo published in 2012"
TL;DR: In this article, the authors propose and experimentally demonstrate a flexible wavelength division multiplexing/time division multiple access network architecture for converged metro-access environment, which is achieved with remote amplification in the signal distribution nodes along the metro ring and in the power splitters of the local access tree.
Abstract: We propose and experimentally demonstrate a flexible wavelength division multiplexing/time division multiplexing network architecture for converged metro-access environment. Entire passiveness in the fiber plant is achieved with remote amplification in the signal distribution nodes along the metro ring and in the power splitters of the local access tree. We assist a traditional remote pumping scheme with a distributed pump provided by the optical network units and demonstrate that loss budgets beyond 30 dB can be supported. Data transmission of up to 10 Gb/s is evaluated in different deployment scenarios, reaching from a 78 km long reach rural to a dense 1:128 split/λ urban configuration with field installed fibers, including also worst case resilience configurations.
31 citations
TL;DR: A simple method for wavelength control of economical random non-preselected independent ONU source, by OLT monitoring and thermal tuning, is presented and dimensioned and reduces the spectral overlap probability and increases the cost-effectiveness of an OFDMA-PON.
Abstract: A simple and low cost method for wavelength control of economical random non-preselected independent ONU sources is shown to increase the number of users in an OFDMA-PON The method is based on OLT monitoring and thermal tuning control; it has been validated through Monte-Carlo simulations and a probabilistic model The minimum optical spectral gap between the ONUs wavelengths that guarantees a tolerable amount of optical beat interference has been determined through an experiment
24 citations
TL;DR: An enhanced homodyne coherent system for ultra-dense WDM-PON is demonstrated, using conventional DFB, coupler instead of 90° hybrid and digital signal processing, achieving improved sensitivity and phase noise tolerance.
Abstract: A homodyne coherent receiver for ultra-dense WDM-PON with off the shelf components is presented. It consists of a conventional DFB, phase switched clock signal, an optical coupler instead of a 90° hybrid, balanced photodetectors and digital signal processing. The phase swing for a DBPSK signal was optimized and the performance was experimentally evaluated in terms of the sensitivity for several laser linewidths. The acceptable frequency offset and clock time delay was also assessed. The results exhibit a sensitivity of -48 dBm at a BER of 10(-3) and indicate a high tolerance to phase noise.
23 citations
16 Sep 2012
TL;DR: In this paper, an enhanced homodyne coherent system for ultra-dense WDM-PON is demonstrated, using conventional DFB, coupler instead of 90° hybrid and digital signal processing, achieving improved sensitivity and phase noise tolerance.
Abstract: An enhanced homodyne coherent system for ultra-dense WDM-PON is demonstrated, using conventional DFB, coupler instead of 90° hybrid and digital signal processing, achieving improved sensitivity and phase noise tolerance.
16 citations
01 Jan 2012
TL;DR: Design and materials for active infrared waveguides based on hybrid/organic materials and experimental implementation of efficient multicast processes towards carrier ethernet networks and all optical multicast.
Abstract: Design and materials for active infrared waveguides based on hybrid/organic materials " Experimental implementation of efficient multicast processes: towards carrier ethernet networks and all optical multicast " ,
6 citations
16 Sep 2012
TL;DR: In this article, a simple technique is presented to improve the sensitivity of cost-effective IMDD-OFDM systems by transmitting the signal absolute value and adding a label with the sample signs.
Abstract: A simple technique is presented to improve the sensitivity of cost-effective IMDD-OFDM systems by transmitting the signal absolute value and adding a label with the sample signs. Results indicate that a boost of about 3dB is achieved.
3 citations
02 Jul 2012
TL;DR: In this article, a TDM-PON deployment based on reflective ONUs is presented in order to optimize number of users for efficient exploitation due to wavelength reuse, the study is focused on the power budget and DS-ER/US-oSRR critical relation.
Abstract: The network dimensioning for a TDM-PON deployment based on reflective ONUs is presented in order to optimize number of users for efficient exploitation. Due to wavelength reuse, the study is focused on the power budget and DS-ER/US-oSRR critical relation. These and other parameters are analyzed theoretical and experimentally and optimal design values are presented. A TDM-PON for 32 users/20km is possible at BER = 5E-4 reference level.
2 citations
04 Mar 2012
TL;DR: Digital Nyquist-WDM is experimentally demonstrated using RSOA-based colorless ONUs, providing a 6-fold enhancement of transmission capacity through 25km fiber, and showing digital Nyquist -WDM as promising candidate for cost-effective flexible bandwidth allocation in PONs.
Abstract: Digital Nyquist-WDM is experimentally demonstrated using RSOA-based colorless ONUs, providing a 6-fold enhancement of transmission capacity through 25km fiber, and showing digital Nyquist-WDM as promising candidate for cost-effective flexible bandwidth allocation in PONs.
2 citations
02 Jul 2012
TL;DR: In this paper, a simple and low cost method for wavelength control based on centralized OLT monitoring and feedback of economical random non-preselected independent ONU sources is presented, which reduces the spectral overlap probability and increasing the number of users and cost-effectiveness of a PON.
Abstract: A simple and low cost method for wavelength control based on centralized OLT monitoring and feedback of economical random non-preselected independent ONU sources is presented. The technique was dimensioned and experimentally tested in an OFDMA-PON with 1 Gb/s ONUs and 30 km of fibre along with the minimum optical spectral gap between consecutive ONU wavelengths. Results indicate that this method reduces the spectral overlap probability and increasing the number of users and cost-effectiveness of a PON
2 citations
07 Nov 2012
TL;DR: In this article, a statistical OFDM-PON was experimentally tested with flexible bandwidth allocation for proper detection of ONUs with differential link loss, and sign-labels were also added to boost the system sensitivity by 3dB.
Abstract: A statistical OFDM-PON was experimentally tested with flexible bandwidth allocation for proper detection of ONUs with differential link loss. Sign-labels were also added to boost the system sensitivity by 3dB.
20 Jun 2012
TL;DR: In this article, an OFDM-PON with a simple centralized wavelength control of low-cost non-preselected independent ONU sources is presented, dimensioned, and tested experimentally.
Abstract: An OFDM-PON with a simple centralized wavelength control of low-cost non-preselected independent ONU sources is presented, dimensioned, and tested experimentally. The rejection-ratio is reduced to less than 1% increasing the cost-effectiveness of the access network.