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Papers by joana chang

Research paper thumbnail of System aspects of the FDMA PON conceived within the FABULOUS European project

2014 16th International Conference on Transparent Optical Networks (ICTON), 2014

We experimentally demonstrate a FDMA-PON system targeting 20 Gbps per wavelength in the upstream,... more We experimentally demonstrate a FDMA-PON system targeting 20 Gbps per wavelength in the upstream, using a real-time FPGA-based transmitter and low-speed baseband DSP, and 39 Gbps in the downstream using a new resources allocation algorithm with 11.5GHz electrical bandwidth, in the framework of the EU research project FABULOUS.

Research paper thumbnail of Overview of the FABULOUS EU Project: final system performance assessment with discrete components

Journal of Lightwave Technology, 2016

In this paper we present the most comprehensive system demonstrator realized so far inside the FA... more In this paper we present the most comprehensive system demonstrator realized so far inside the FABULOUS project, an EU 7 th Framework Program European research project. The architecture proposed in FABULOUS is based on frequency division multiplexed PON and uses a self-coherent and reflective approach in the upstream. The demonstration presented in this paper uses discrete optoelectronics components. We will show system experiments realized with 5 active Optical Network Units, together with the emulation of other 27 ONUs ASE noise, demonstrating that such network is capable of an upstream transmission of 32 Gbps over 40 Km of dark fiber and an attenuation of 31 dB, in compliancy with ODN class N2 of the latest PON standards. In addition, we will demonstrate, thanks to the flexibility of frequency multiplexing, that the network can adapt its performances to the link conditions, achieving higher aggregate bit rates or higher losses depending on the link quality that every user in the network experiences. To conclude, we will investigate on the feasibility of the required Digital Signal Processing onto FPGA or ASIC platforms.

Research paper thumbnail of Presentation given at ICTON 2015

Research paper thumbnail of Presentation given at ICC 2015

Research paper thumbnail of Self-coherent reflective FDMA-PON for next generation access and LAN architectures

2015 IEEE International Conference on Communications (ICC), 2015

ABSTRACT In this paper we will give an insight to the FABULOUS European Project, pertaining to th... more ABSTRACT In this paper we will give an insight to the FABULOUS European Project, pertaining to the 7th Framework Program, showing a self-coherent passive optical network that employs Frequency Division Multiplexing and is compatible with legacy infrastructures and NG-PON2 power budget specifications, while exceeding them in terms of bit-rate. FABULOUS also envisions an innovative Optical Network Unit, based on a reflective Mach-Zehnder modulator, that is suitable for full integration in silicon-photonics, for realizing low-cost customer premises equipment, indispensable for a massive deployment of the solution. The novelty of this work compared to previous papers in the same areas is in focusing on different possible applications having different physical layer requirements, including the recent trend that propose high-capacity PON as an alternative solution for next-generation Local Area Network.

Research paper thumbnail of TWDM-PON-compatible 10 Gbps burst-mode coherent reflective ONU achieving 31 dB ODN loss using DFB lasers

2014 The European Conference on Optical Communication (ECOC), 2014

We present a self-coherent reflective PON demonstrator, TWDM-PON compatible, running at 10 Gbps u... more We present a self-coherent reflective PON demonstrator, TWDM-PON compatible, running at 10 Gbps upstream bit rate per ONU using commercial DFB lasers, achieving 31 dB ODN loss at BER=10-3 over splitter-based PON in TWDM-like burst mode operation.

Research paper thumbnail of Upstream transmission in a reflective FDMA-PON: Results from the EU project FABULOUS

2014 European Conference on Networks and Communications (EuCNC), 2014

In this paper, we present a new FDMA-PON (Frequency Division Multiple Access-Passive Optical Netw... more In this paper, we present a new FDMA-PON (Frequency Division Multiple Access-Passive Optical Network) architecture proposed by the FP7 EU STREP project titled "FABULOUS". The paper is focused on the upstream transmission, based on an innovative reflective optical network unit (R-ONU). A detailed theoretical analysis is first presented and used to optimize the system parameters, then we show the experimental results, demonstrating a 16 Gbps upstream bit rate per wavelength.

Research paper thumbnail of Downstream transmission dimensioning in FDMA-PON architectures: Results from the EU project “FABULOUS&#x201D

2014 Fotonica AEIT Italian Conference on Photonics Technologies, 2014

In this paper we present the FDMA-PON (Frequency Division Multiple Access-Passive Optical Network... more In this paper we present the FDMA-PON (Frequency Division Multiple Access-Passive Optical Network) architecture proposed by the FP7 EU STREP project titled "FABULOUS", focusing on downstream transmission. We experimentally demonstrate that the proposed architecture allows to reach 16 Gbps aggregated capacity per downstream wavelength over an optical distribution network with 30dB loss, still using direct-detection receivers and requiring relatively low speed digital signal processing at the ONU side.

Research paper thumbnail of Reflective FDMA-PON with 32 Gbps upstream capacity per wavelength and more than 32 dB ODN loss

2014 The European Conference on Optical Communication (ECOC), 2014

Research paper thumbnail of Real-time transmission experiments for the FDMA-PON conceived within FABULOUS european project

2015 17th International Conference on Transparent Optical Networks (ICTON), 2015

Research paper thumbnail of Optimization of Reflective FDMA-PON Architecture to Achieve 32 Gb/s Per Upstream Wavelength Over 31 dB ODN Loss

Journal of Lightwave Technology, 2015

In the framework of the EU-funded research project "FABULOUS" we experimentally demonstrate an in... more In the framework of the EU-funded research project "FABULOUS" we experimentally demonstrate an innovative FDMA-PON architecture whose upstream transmission is based on a reflective Mach-Zehnder modulator. By a careful optimization of electrical spectrum allocation, semiconductor optical amplifier biasing point and modulation index, we upgrade previous results over similar architectures, significantly increasing the achievable optical distribution network loss. We demonstrate an overall upstream capacity of 32 Gbps per wavelength over 37 km of installed fiber and 31 dB loss.

Research paper thumbnail of 20 Gbps upstream FDMA-PON real-time and low-speed DSP demonstrator

ABSTRACT We experimentally demonstrate a FDMA-PON system targeting 20 Gbps per wavelength in the ... more ABSTRACT We experimentally demonstrate a FDMA-PON system targeting 20 Gbps per wavelength in the upstream, using a real-time FPGA-based transmitter and low-speed baseband DSP, in the framework of the EU research project FABULOUS.

Research paper thumbnail of Toward 20 Gbps upstream FDMA-PON real-time and low-speed DSP demonstrator

Optical Fiber Communication Conference, 2014

We experimentally demonstrate a FDMA-PON system targeting 20 Gbps per wavelength in the upstream,... more We experimentally demonstrate a FDMA-PON system targeting 20 Gbps per wavelength in the upstream, using a real-time FPGA-based transmitter and low-speed baseband DSP, in the framework of the EU research project FABULOUS.

Research paper thumbnail of Single-Wavelength Downstream FDMA-PON at 32 Gbps and 34 dB ODN Loss

IEEE Photonics Technology Letters, 2015

We propose a PON solution to reach 32 Gbps over a traditional high loss downstream splitter-based... more We propose a PON solution to reach 32 Gbps over a traditional high loss downstream splitter-based optical distribution network (ODN) without using multiple wavelengths at the OLT side nor massive digital signal processing at the ONU side. The achieved 32 Gbps capacity is not too far from the 40 Gbps given by a 4-wavelengths TWDM-PON but completely avoids the handling of multiple wavelengths thanks to a higher electrical spectral efficiency and some system optimization.

Research paper thumbnail of Demonstration of upstream WDM+FDMA PON and real time implementation on an FPGA platform

We present a final demonstration of upstream FDMA-PON transmission on the EU project FABULOUS arc... more We present a final demonstration of upstream FDMA-PON transmission on the EU project FABULOUS architecture. We show WDM capability over four wavelengths, each carrying 32 Gbps at 31 dB ODN loss, and DSP real time implementation on a commercial FPGA.

Research paper thumbnail of System aspects of the FDMA PON conceived within the FABULOUS European project

2014 16th International Conference on Transparent Optical Networks (ICTON), 2014

We experimentally demonstrate a FDMA-PON system targeting 20 Gbps per wavelength in the upstream,... more We experimentally demonstrate a FDMA-PON system targeting 20 Gbps per wavelength in the upstream, using a real-time FPGA-based transmitter and low-speed baseband DSP, and 39 Gbps in the downstream using a new resources allocation algorithm with 11.5GHz electrical bandwidth, in the framework of the EU research project FABULOUS.

Research paper thumbnail of Overview of the FABULOUS EU Project: final system performance assessment with discrete components

Journal of Lightwave Technology, 2016

In this paper we present the most comprehensive system demonstrator realized so far inside the FA... more In this paper we present the most comprehensive system demonstrator realized so far inside the FABULOUS project, an EU 7 th Framework Program European research project. The architecture proposed in FABULOUS is based on frequency division multiplexed PON and uses a self-coherent and reflective approach in the upstream. The demonstration presented in this paper uses discrete optoelectronics components. We will show system experiments realized with 5 active Optical Network Units, together with the emulation of other 27 ONUs ASE noise, demonstrating that such network is capable of an upstream transmission of 32 Gbps over 40 Km of dark fiber and an attenuation of 31 dB, in compliancy with ODN class N2 of the latest PON standards. In addition, we will demonstrate, thanks to the flexibility of frequency multiplexing, that the network can adapt its performances to the link conditions, achieving higher aggregate bit rates or higher losses depending on the link quality that every user in the network experiences. To conclude, we will investigate on the feasibility of the required Digital Signal Processing onto FPGA or ASIC platforms.

Research paper thumbnail of Presentation given at ICTON 2015

Research paper thumbnail of Presentation given at ICC 2015

Research paper thumbnail of Self-coherent reflective FDMA-PON for next generation access and LAN architectures

2015 IEEE International Conference on Communications (ICC), 2015

ABSTRACT In this paper we will give an insight to the FABULOUS European Project, pertaining to th... more ABSTRACT In this paper we will give an insight to the FABULOUS European Project, pertaining to the 7th Framework Program, showing a self-coherent passive optical network that employs Frequency Division Multiplexing and is compatible with legacy infrastructures and NG-PON2 power budget specifications, while exceeding them in terms of bit-rate. FABULOUS also envisions an innovative Optical Network Unit, based on a reflective Mach-Zehnder modulator, that is suitable for full integration in silicon-photonics, for realizing low-cost customer premises equipment, indispensable for a massive deployment of the solution. The novelty of this work compared to previous papers in the same areas is in focusing on different possible applications having different physical layer requirements, including the recent trend that propose high-capacity PON as an alternative solution for next-generation Local Area Network.

Research paper thumbnail of TWDM-PON-compatible 10 Gbps burst-mode coherent reflective ONU achieving 31 dB ODN loss using DFB lasers

2014 The European Conference on Optical Communication (ECOC), 2014

We present a self-coherent reflective PON demonstrator, TWDM-PON compatible, running at 10 Gbps u... more We present a self-coherent reflective PON demonstrator, TWDM-PON compatible, running at 10 Gbps upstream bit rate per ONU using commercial DFB lasers, achieving 31 dB ODN loss at BER=10-3 over splitter-based PON in TWDM-like burst mode operation.

Research paper thumbnail of Upstream transmission in a reflective FDMA-PON: Results from the EU project FABULOUS

2014 European Conference on Networks and Communications (EuCNC), 2014

In this paper, we present a new FDMA-PON (Frequency Division Multiple Access-Passive Optical Netw... more In this paper, we present a new FDMA-PON (Frequency Division Multiple Access-Passive Optical Network) architecture proposed by the FP7 EU STREP project titled "FABULOUS". The paper is focused on the upstream transmission, based on an innovative reflective optical network unit (R-ONU). A detailed theoretical analysis is first presented and used to optimize the system parameters, then we show the experimental results, demonstrating a 16 Gbps upstream bit rate per wavelength.

Research paper thumbnail of Downstream transmission dimensioning in FDMA-PON architectures: Results from the EU project “FABULOUS&#x201D

2014 Fotonica AEIT Italian Conference on Photonics Technologies, 2014

In this paper we present the FDMA-PON (Frequency Division Multiple Access-Passive Optical Network... more In this paper we present the FDMA-PON (Frequency Division Multiple Access-Passive Optical Network) architecture proposed by the FP7 EU STREP project titled "FABULOUS", focusing on downstream transmission. We experimentally demonstrate that the proposed architecture allows to reach 16 Gbps aggregated capacity per downstream wavelength over an optical distribution network with 30dB loss, still using direct-detection receivers and requiring relatively low speed digital signal processing at the ONU side.

Research paper thumbnail of Reflective FDMA-PON with 32 Gbps upstream capacity per wavelength and more than 32 dB ODN loss

2014 The European Conference on Optical Communication (ECOC), 2014

Research paper thumbnail of Real-time transmission experiments for the FDMA-PON conceived within FABULOUS european project

2015 17th International Conference on Transparent Optical Networks (ICTON), 2015

Research paper thumbnail of Optimization of Reflective FDMA-PON Architecture to Achieve 32 Gb/s Per Upstream Wavelength Over 31 dB ODN Loss

Journal of Lightwave Technology, 2015

In the framework of the EU-funded research project "FABULOUS" we experimentally demonstrate an in... more In the framework of the EU-funded research project "FABULOUS" we experimentally demonstrate an innovative FDMA-PON architecture whose upstream transmission is based on a reflective Mach-Zehnder modulator. By a careful optimization of electrical spectrum allocation, semiconductor optical amplifier biasing point and modulation index, we upgrade previous results over similar architectures, significantly increasing the achievable optical distribution network loss. We demonstrate an overall upstream capacity of 32 Gbps per wavelength over 37 km of installed fiber and 31 dB loss.

Research paper thumbnail of 20 Gbps upstream FDMA-PON real-time and low-speed DSP demonstrator

ABSTRACT We experimentally demonstrate a FDMA-PON system targeting 20 Gbps per wavelength in the ... more ABSTRACT We experimentally demonstrate a FDMA-PON system targeting 20 Gbps per wavelength in the upstream, using a real-time FPGA-based transmitter and low-speed baseband DSP, in the framework of the EU research project FABULOUS.

Research paper thumbnail of Toward 20 Gbps upstream FDMA-PON real-time and low-speed DSP demonstrator

Optical Fiber Communication Conference, 2014

We experimentally demonstrate a FDMA-PON system targeting 20 Gbps per wavelength in the upstream,... more We experimentally demonstrate a FDMA-PON system targeting 20 Gbps per wavelength in the upstream, using a real-time FPGA-based transmitter and low-speed baseband DSP, in the framework of the EU research project FABULOUS.

Research paper thumbnail of Single-Wavelength Downstream FDMA-PON at 32 Gbps and 34 dB ODN Loss

IEEE Photonics Technology Letters, 2015

We propose a PON solution to reach 32 Gbps over a traditional high loss downstream splitter-based... more We propose a PON solution to reach 32 Gbps over a traditional high loss downstream splitter-based optical distribution network (ODN) without using multiple wavelengths at the OLT side nor massive digital signal processing at the ONU side. The achieved 32 Gbps capacity is not too far from the 40 Gbps given by a 4-wavelengths TWDM-PON but completely avoids the handling of multiple wavelengths thanks to a higher electrical spectral efficiency and some system optimization.

Research paper thumbnail of Demonstration of upstream WDM+FDMA PON and real time implementation on an FPGA platform

We present a final demonstration of upstream FDMA-PON transmission on the EU project FABULOUS arc... more We present a final demonstration of upstream FDMA-PON transmission on the EU project FABULOUS architecture. We show WDM capability over four wavelengths, each carrying 32 Gbps at 31 dB ODN loss, and DSP real time implementation on a commercial FPGA.