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Papers by Giancarlo Faria
Anais do XXVI Simpósio Brasileiro de Telecomunicações
Microwave and Optical Technology Letters
AIP Conference Proceedings, 2009
Almost all Quantum Key Distribution experiments in optical fibers performed so far have used the ... more Almost all Quantum Key Distribution experiments in optical fibers performed so far have used the so called “dark fibers,” which are exclusively used as the quantum channel. As quantum communications make its way towards commercial applications, there is a clear advantage in using fibers with simultaneous classical signals, via wavelength multiplexing, for that purpose. We show what is the noise
2007 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference, 2007
ABSTRACT
The 17th Annual Meeting of the IEEELasers and Electro-Optics Society, 2004. LEOS 2004., 2004
OTDR in the S-, C- and L-bands shows that amplified Rayleigh scattering echoes are more important... more OTDR in the S-, C- and L-bands shows that amplified Rayleigh scattering echoes are more important than double Rayleigh scattering for return losses above -60 dB in forward pumping configurations. Gain depletion can give rise to 2 dB OTDR errors at high gain.
2009 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC), 2009
Optical Measurement Systems for Industrial Inspection VII, 2011
Polarization modes dispersion (PMD) is one of the major factors that impose restrictions in the s... more Polarization modes dispersion (PMD) is one of the major factors that impose restrictions in the speed of optical communication links and some efforts must be done in order to properly quantify this effect. In this way we develop studies on the behavior of such a phenomenon, critical when light is transmitted through long optical fibers. The focus in this paper
Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 2010
We experimentally demonstrate a two-way stable transmission of polarization encoded qubits over 2... more We experimentally demonstrate a two-way stable transmission of polarization encoded qubits over 23 km of spooled dispersion-shifted fiber with active polarization control in both directions, while simultaneously exchanging classical data. Two classical reference channels (one containing a telecom 10 Gb/s data stream), wavelength-multiplexed with the quantum signal, are used as feedback. The feasibility of quantum communication is demonstrated in the two opposite directions over 6 hours of continuous operation, as well as a classical error rate better than 1.0 x 10-9 .
Optical Fiber Communication Conference/National Fiber Optic Engineers Conference 2013, 2013
ABSTRACT We present a new method for fault location in passive optical networks by employing a tu... more ABSTRACT We present a new method for fault location in passive optical networks by employing a tunable OTDR and wavelength-selective isolators in the remote node. A proof-of-principle experiment is performed, demonstrating the feasibility of the technique.
2012 IV International Congress on Ultra Modern Telecommunications and Control Systems, 2012
2008 International Topical Meeting on Microwave Photonics jointly held with the 2008 Asia-Pacific Microwave Photonics Conference, 2008
In order to achieve a reliable ROF system with centralized wavelength operation, it is essential ... more In order to achieve a reliable ROF system with centralized wavelength operation, it is essential to provide enough power for remote antenna unit without the need of copper wires or any kind of batteries. Moreover, to ensure a high quality full-duplex communication when heterodyne generation is employed to obtain the microwave signal, a carefully choice of the laser sources is
ABSTRACT We present a new method for fault location in passive optical networks by employing a tu... more ABSTRACT We present a new method for fault location in passive optical networks by employing a tunable OTDR and wavelength-selective isolators in the remote node. A proof-of-principle experiment is performed, demonstrating the feasibility of the technique.
2009 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC), 2009
IEE Proceedings - Optoelectronics, 2006
ABSTRACT Factory measurements of polarisation mode dispersion (PMD) on optical ground wire cabled... more ABSTRACT Factory measurements of polarisation mode dispersion (PMD) on optical ground wire cabled fibres are compared with field measurements of the installed span links. Analysis of the expected PMD values calculated from the factory measurements and the as-built reports reveal a systematic overestimation of the PMD in installed links, mitigated by correction of the limited sensitivity of commercial equipments. Unexpectedly high PMD values are observed, indicating that important changes on the PMD characteristics of the fibres may occur during cable installation
Optical Measurement Systems for Industrial Inspection VII, 2011
Optical Measurement Systems for Industrial Inspection VII, 2011
Polarization modes dispersion (PMD) is one of the major factors that impose restrictions in the s... more Polarization modes dispersion (PMD) is one of the major factors that impose restrictions in the speed of optical communication links and some efforts must be done in order to properly quantify this effect. In this way we develop studies on the behavior of such a phenomenon, critical when light is transmitted through long optical fibers. The focus in this paper is to discuss the different behavior of PMD over different wavelengths ranges. Results indicate that PMD value varies, depending on the spectral region covered by the optical source. Measurements were performed using the interferometric method on three different types of optical fiber with three broadband optical sources covering the infrared spectral bands O, S, C and L. The evaluation of mean PMD is also discussed in the metrology concepts.
Anais do XXVI Simpósio Brasileiro de Telecomunicações
Microwave and Optical Technology Letters
AIP Conference Proceedings, 2009
Almost all Quantum Key Distribution experiments in optical fibers performed so far have used the ... more Almost all Quantum Key Distribution experiments in optical fibers performed so far have used the so called “dark fibers,” which are exclusively used as the quantum channel. As quantum communications make its way towards commercial applications, there is a clear advantage in using fibers with simultaneous classical signals, via wavelength multiplexing, for that purpose. We show what is the noise
2007 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference, 2007
ABSTRACT
The 17th Annual Meeting of the IEEELasers and Electro-Optics Society, 2004. LEOS 2004., 2004
OTDR in the S-, C- and L-bands shows that amplified Rayleigh scattering echoes are more important... more OTDR in the S-, C- and L-bands shows that amplified Rayleigh scattering echoes are more important than double Rayleigh scattering for return losses above -60 dB in forward pumping configurations. Gain depletion can give rise to 2 dB OTDR errors at high gain.
2009 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC), 2009
Optical Measurement Systems for Industrial Inspection VII, 2011
Polarization modes dispersion (PMD) is one of the major factors that impose restrictions in the s... more Polarization modes dispersion (PMD) is one of the major factors that impose restrictions in the speed of optical communication links and some efforts must be done in order to properly quantify this effect. In this way we develop studies on the behavior of such a phenomenon, critical when light is transmitted through long optical fibers. The focus in this paper
Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 2010
We experimentally demonstrate a two-way stable transmission of polarization encoded qubits over 2... more We experimentally demonstrate a two-way stable transmission of polarization encoded qubits over 23 km of spooled dispersion-shifted fiber with active polarization control in both directions, while simultaneously exchanging classical data. Two classical reference channels (one containing a telecom 10 Gb/s data stream), wavelength-multiplexed with the quantum signal, are used as feedback. The feasibility of quantum communication is demonstrated in the two opposite directions over 6 hours of continuous operation, as well as a classical error rate better than 1.0 x 10-9 .
Optical Fiber Communication Conference/National Fiber Optic Engineers Conference 2013, 2013
ABSTRACT We present a new method for fault location in passive optical networks by employing a tu... more ABSTRACT We present a new method for fault location in passive optical networks by employing a tunable OTDR and wavelength-selective isolators in the remote node. A proof-of-principle experiment is performed, demonstrating the feasibility of the technique.
2012 IV International Congress on Ultra Modern Telecommunications and Control Systems, 2012
2008 International Topical Meeting on Microwave Photonics jointly held with the 2008 Asia-Pacific Microwave Photonics Conference, 2008
In order to achieve a reliable ROF system with centralized wavelength operation, it is essential ... more In order to achieve a reliable ROF system with centralized wavelength operation, it is essential to provide enough power for remote antenna unit without the need of copper wires or any kind of batteries. Moreover, to ensure a high quality full-duplex communication when heterodyne generation is employed to obtain the microwave signal, a carefully choice of the laser sources is
ABSTRACT We present a new method for fault location in passive optical networks by employing a tu... more ABSTRACT We present a new method for fault location in passive optical networks by employing a tunable OTDR and wavelength-selective isolators in the remote node. A proof-of-principle experiment is performed, demonstrating the feasibility of the technique.
2009 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC), 2009
IEE Proceedings - Optoelectronics, 2006
ABSTRACT Factory measurements of polarisation mode dispersion (PMD) on optical ground wire cabled... more ABSTRACT Factory measurements of polarisation mode dispersion (PMD) on optical ground wire cabled fibres are compared with field measurements of the installed span links. Analysis of the expected PMD values calculated from the factory measurements and the as-built reports reveal a systematic overestimation of the PMD in installed links, mitigated by correction of the limited sensitivity of commercial equipments. Unexpectedly high PMD values are observed, indicating that important changes on the PMD characteristics of the fibres may occur during cable installation
Optical Measurement Systems for Industrial Inspection VII, 2011
Optical Measurement Systems for Industrial Inspection VII, 2011
Polarization modes dispersion (PMD) is one of the major factors that impose restrictions in the s... more Polarization modes dispersion (PMD) is one of the major factors that impose restrictions in the speed of optical communication links and some efforts must be done in order to properly quantify this effect. In this way we develop studies on the behavior of such a phenomenon, critical when light is transmitted through long optical fibers. The focus in this paper is to discuss the different behavior of PMD over different wavelengths ranges. Results indicate that PMD value varies, depending on the spectral region covered by the optical source. Measurements were performed using the interferometric method on three different types of optical fiber with three broadband optical sources covering the infrared spectral bands O, S, C and L. The evaluation of mean PMD is also discussed in the metrology concepts.