Abstract In this work, we investigated a novel wavelength division multiplexing passive optical n... more Abstract In this work, we investigated a novel wavelength division multiplexing passive optical network (WDM-PON) configuration, based on cascaded reflective semiconductor optical amplifiers (RSOA) data erasure for combined self-seeding and wavelength reuse. Improved performance is achieved by enhanced erasure efficiency using a self-seeded double-RSOA cavity at the optical line terminal (OLT) and cascaded RSOAs at the optical network terminal (ONT). To carry out the study, our experimental results for our earlier combined topology layout operating at a symmetric transmission were used to validate the simulation framework for the proposed double-RSOA erasure configuration. Using our original single-cavity self-seeding WDM-PON architecture as a benchmark, downstream extinction ratio ( E R D ) margins of 6.5 dB and 9.0 dB are obtained, for generating self-seeded downstream signals and upstream remodulation, respectively. Also, bidirectional transmission of 1.25 Gb/s over links reach up to 45 km is achieved by the double-RSOA cavity, surpassing in 25 km our original combined topology. The results indicated that our proposition effectively addresses a fundamental trade-off for WDM-PONs based on the wavelength reuse and/or self-seeding techniques. Specifically, the double erasure procedure allows the use of relatively high levels of E R D , thereby providing improved bit error rate (BER) at the ONT, while assuring high-quality generation of the self-seeding carrier and loopback operation.
This paper presents an up/down converter double-balanced Gilbert cell mixer for frequencies of 43... more This paper presents an up/down converter double-balanced Gilbert cell mixer for frequencies of 433, 870 and 928 MHz in the ISM band (industrial, scientific and medical). This mixer was designed with the on-semiconductor (former AMIS) 0.7μm CMOS technology. The Gilbert cell topology was selected due to its good figure of merit (FOM), which takes into account parameters such as the conversion gain (CG), isolation between the input ports, linearity and the noise figure. This mixer provides frequency translation by means of a true multiplication on four quadrants. The simulations showed a total power consumption of 3mW from a power supply of 5V, a CG of 10.5dB, an input referred third-order input intercept point (IIP3) of 29.72dBm and an input referred 1-dB compression point (IP1dB) of 13.15dBm. This paper also presents a comparison for the three bands in order to confirm the scalability and suitability of the mixer implemented. The target application of this mixer is to provide communication to/from intra-corporal communication devices.
2021 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC), 2021
WDM-PON is currently being considered for the standardization of 50G-PON, particularly for the fr... more WDM-PON is currently being considered for the standardization of 50G-PON, particularly for the fronthaul deployment of 5G networks. However, to be a viable candidate for this demanding application WDM-PON configuration must offer reduced costs and be free of inventory problems. The solution is to employ colorless sources, where the same hardware can be used regardless of the wavelength. In this regard, this paper presents a WDM-PON topology employing tunable Vertical-Cavity Surface-Emitting Lasers (VCSELs) and a carrier reuse scheme based on Reflective Semiconductor Optical Amplifiers (RSOAs) as a 5G Analog Fronthaul configuration. Error Vector Magnitude (EVM) results are within the specifications imposed by 3GPP when operating at 3.5 GHz with 1.25 Gbps and 26 GHz with 10 Gbps.
ISSNIP Biosignals and Biorobotics Conference 2011, 2011
Page 1. Experimental Evidences for Visual Evoked Potentials with Stimuli Beyond the Conscious Per... more Page 1. Experimental Evidences for Visual Evoked Potentials with Stimuli Beyond the Conscious Perception Threshold Sérgio G. Ramos-Júnior 1, Daniel R. Celino 1, Fáuzi F. Rodor 1, Moisés RN Ribeiro 1, Sandra MT Müller ...
This paper presents a fully analytical model for the current-voltage (I–V) characteristics of Res... more This paper presents a fully analytical model for the current-voltage (I–V) characteristics of Resonant Tunneling Diodes. Based on Tsu-Esaki formalism, we consider the full electrical potential distribution in the structure, including the space charge regions at the emitter and collector layers. In addition, we account for the scattering suffered by carriers when tunneling through the double-barrier region, as a function of the applied bias voltage. These considerations improve the accuracy of the proposed model when compared with other approaches while keeping it physics based and fully analytical. Finally, the model is validated with experimental and numericaldata, demonstrating its feasibility for applications in circuit simulation environments.
2017 32nd Symposium on Microelectronics Technology and Devices (SBMicro), 2017
This paper presents an up/down converter double-balanced Gilbert cell mixer for frequencies of 43... more This paper presents an up/down converter double-balanced Gilbert cell mixer for frequencies of 433, 870 and 928 MHz in the ISM band (industrial, scientific and medical). This mixer was designed with the on-semiconductor (former AMIS) 0.7μm CMOS technology. The Gilbert cell topology was selected due to its good figure of merit (FOM), which takes into account parameters such as the conversion gain (CG), isolation between the input ports, linearity and the noise figure. This mixer provides frequency translation by means of a true multiplication on four quadrants. The simulations showed a total power consumption of 3mW from a power supply of 5V, a CG of 10.5dB, an input referred third-order input intercept point (IIP3) of 29.72dBm and an input referred 1-dB compression point (IP1dB) of 13.15dBm. This paper also presents a comparison for the three bands in order to confirm the scalability and suitability of the mixer implemented. The target application of this mixer is to provide communication to/from intra-corporal communication devices.
Abstract In this work, we investigated a novel wavelength division multiplexing passive optical n... more Abstract In this work, we investigated a novel wavelength division multiplexing passive optical network (WDM-PON) configuration, based on cascaded reflective semiconductor optical amplifiers (RSOA) data erasure for combined self-seeding and wavelength reuse. Improved performance is achieved by enhanced erasure efficiency using a self-seeded double-RSOA cavity at the optical line terminal (OLT) and cascaded RSOAs at the optical network terminal (ONT). To carry out the study, our experimental results for our earlier combined topology layout operating at a symmetric transmission were used to validate the simulation framework for the proposed double-RSOA erasure configuration. Using our original single-cavity self-seeding WDM-PON architecture as a benchmark, downstream extinction ratio ( E R D ) margins of 6.5 dB and 9.0 dB are obtained, for generating self-seeded downstream signals and upstream remodulation, respectively. Also, bidirectional transmission of 1.25 Gb/s over links reach up to 45 km is achieved by the double-RSOA cavity, surpassing in 25 km our original combined topology. The results indicated that our proposition effectively addresses a fundamental trade-off for WDM-PONs based on the wavelength reuse and/or self-seeding techniques. Specifically, the double erasure procedure allows the use of relatively high levels of E R D , thereby providing improved bit error rate (BER) at the ONT, while assuring high-quality generation of the self-seeding carrier and loopback operation.
This paper presents an up/down converter double-balanced Gilbert cell mixer for frequencies of 43... more This paper presents an up/down converter double-balanced Gilbert cell mixer for frequencies of 433, 870 and 928 MHz in the ISM band (industrial, scientific and medical). This mixer was designed with the on-semiconductor (former AMIS) 0.7μm CMOS technology. The Gilbert cell topology was selected due to its good figure of merit (FOM), which takes into account parameters such as the conversion gain (CG), isolation between the input ports, linearity and the noise figure. This mixer provides frequency translation by means of a true multiplication on four quadrants. The simulations showed a total power consumption of 3mW from a power supply of 5V, a CG of 10.5dB, an input referred third-order input intercept point (IIP3) of 29.72dBm and an input referred 1-dB compression point (IP1dB) of 13.15dBm. This paper also presents a comparison for the three bands in order to confirm the scalability and suitability of the mixer implemented. The target application of this mixer is to provide communication to/from intra-corporal communication devices.
2021 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC), 2021
WDM-PON is currently being considered for the standardization of 50G-PON, particularly for the fr... more WDM-PON is currently being considered for the standardization of 50G-PON, particularly for the fronthaul deployment of 5G networks. However, to be a viable candidate for this demanding application WDM-PON configuration must offer reduced costs and be free of inventory problems. The solution is to employ colorless sources, where the same hardware can be used regardless of the wavelength. In this regard, this paper presents a WDM-PON topology employing tunable Vertical-Cavity Surface-Emitting Lasers (VCSELs) and a carrier reuse scheme based on Reflective Semiconductor Optical Amplifiers (RSOAs) as a 5G Analog Fronthaul configuration. Error Vector Magnitude (EVM) results are within the specifications imposed by 3GPP when operating at 3.5 GHz with 1.25 Gbps and 26 GHz with 10 Gbps.
ISSNIP Biosignals and Biorobotics Conference 2011, 2011
Page 1. Experimental Evidences for Visual Evoked Potentials with Stimuli Beyond the Conscious Per... more Page 1. Experimental Evidences for Visual Evoked Potentials with Stimuli Beyond the Conscious Perception Threshold Sérgio G. Ramos-Júnior 1, Daniel R. Celino 1, Fáuzi F. Rodor 1, Moisés RN Ribeiro 1, Sandra MT Müller ...
This paper presents a fully analytical model for the current-voltage (I–V) characteristics of Res... more This paper presents a fully analytical model for the current-voltage (I–V) characteristics of Resonant Tunneling Diodes. Based on Tsu-Esaki formalism, we consider the full electrical potential distribution in the structure, including the space charge regions at the emitter and collector layers. In addition, we account for the scattering suffered by carriers when tunneling through the double-barrier region, as a function of the applied bias voltage. These considerations improve the accuracy of the proposed model when compared with other approaches while keeping it physics based and fully analytical. Finally, the model is validated with experimental and numericaldata, demonstrating its feasibility for applications in circuit simulation environments.
2017 32nd Symposium on Microelectronics Technology and Devices (SBMicro), 2017
This paper presents an up/down converter double-balanced Gilbert cell mixer for frequencies of 43... more This paper presents an up/down converter double-balanced Gilbert cell mixer for frequencies of 433, 870 and 928 MHz in the ISM band (industrial, scientific and medical). This mixer was designed with the on-semiconductor (former AMIS) 0.7μm CMOS technology. The Gilbert cell topology was selected due to its good figure of merit (FOM), which takes into account parameters such as the conversion gain (CG), isolation between the input ports, linearity and the noise figure. This mixer provides frequency translation by means of a true multiplication on four quadrants. The simulations showed a total power consumption of 3mW from a power supply of 5V, a CG of 10.5dB, an input referred third-order input intercept point (IIP3) of 29.72dBm and an input referred 1-dB compression point (IP1dB) of 13.15dBm. This paper also presents a comparison for the three bands in order to confirm the scalability and suitability of the mixer implemented. The target application of this mixer is to provide communication to/from intra-corporal communication devices.
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Papers by Daniel Celino