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Listar por palabra clave "Optical signal processing"

Mostrando ítems 1-15 de 15

Colloidal Quantum Dots-PMMA Waveguides as Integrable Microwave Photonic Phase Shifters

Ricchiuti, Amelia L.; Suárez Álvarez, Isaac; Barrera Vilar, David; Rodríguez Cantó, Pedro Javier; Fernandez-Pousa, Carlos R.; Abargues, Rafael; Sales Maicas, Salvador; Martinez-Pastor, Juan; Capmany Francoy, José (Institute of Electrical and Electronics Engineers (IEEE), 2014-02-15)

A novel scheme for the control of microwave signals carried at optical wavelengths by use of PbS colloidal quantum dots embedded in PMMA waveguides is presented. When these structures are pumped at wavelengths where PbS ...
Continuous Broadband MWP True-Time Delay with PbS-PMMA and -SU8 waveguides

Perez, Joaquin; Suárez Álvarez, Isaac; Hervás-Peralta, Javier; Ricchiuti, Amelia Lavinia; Martinez-Pastor, Juan P.; Sales Maicas, Salvador (Institute of Electrical and Electronics Engineers (IEEE), 2016-08-01)

[EN] A new microwave true-time delay (TTD) photonic unit based on the dispersion of PbS colloidal quantum dots (QDs) in a Polymethyl methacrylate (PMMA) and the SU8 photoresist is presented. With this aim, the PbS-PMMA and ...
Dispersion-Diversity Multicore Fiber Signal Processing

García-Cortijo, Sergi; Ureña-Gisbert, Mario; Gasulla Mestre, Ivana (American Chemical Society, 2022-08-17)

[EN] Beyond playing a primary role in high-capacity communication networks, multicore optical fibers can bring many advantages to optical and microwave signal processing, as not only space but also chromatic dispersion are ...
Experimental Demonstration of Extended 5G Digital Fronthaul Over a Partially-Disaggregated WDM/SDM Network

Fabrega, Josep M.; Múñoz, Raúl; Nadal, Laia; Manso, Carlos; Svaluto Moreolo, Michela; Vilalta, Ricard; Martínez, Ricardo; Vílchez, Francisco Javier; Pérez-Galacho, Diego; Sales Maicas, Salvador; Grivas, Evangelos; Turkiewicz, Jaroslaw P.; Rommel, Simon; Tafur Monroy, Idelfonso (Institute of Electrical and Electronics Engineers, 2021-09)

[EN] We experimentally demonstrate a 5G digital fronthaul network that relies on multi-adaptive bandwidth/bitrate variable transceivers (BVTs) and an autonomic software-defined networking (SDN) control system for ...
Integrated Microwave Photonics Coherent Processor for Massive-MIMO Systems in Wireless Communications

Martínez-Carrasco Romero, Pablo; Rausell-Campo, Jose Roberto; Pérez-Galacho, Diego; Li, Xu; Qing, Ting; Pérez-López, Daniel; Wang, Tiangxiang (Institute of Electrical and Electronics Engineers, 2023-11)

[EN] Massive-MIMO systems can achieve high capacities and data rates by increasing the number of operational antennas in the base station. As more antenna elements are introduced, the complexity of the signal processing ...
Performance Comparison of OFDM-UWB Radio Signals Distribution in Long-Reach PONs Using Mach-Zehnder and Linearized Modulators

Alves, Tiago; Morant, Maria; Cartaxo, Adolfo; Llorente, Roberto (Institute of Electrical and Electronics Engineers (IEEE), 2011-06)

[EN] The performance of orthogonal frequency division multiplexing ultra wideband (UWB) radio signals distribution in long-reach passive optical networks (LR-PONs) using conventional chirp-less Mach Zehnder (MZ) and ...
Periodic time-domain modulation for the electrically tunable control of optical pulse train envelope and repetition rate multiplication

Tainta, Santiago; Erro Betran, Mª Jose; Amaya Ocampo, Waldimar Alexander; Garde. María José; Sales Maicas, Salvador; Muriel Fernandez, Miguel Angel (Institute of Electrical and Electronics Engineers (IEEE), 2012-01)

An electrically tunable system for the control of optical pulse sequences is proposed and demonstrated. It is based on the use of an electrooptic modulator for periodic phase modulation followed by a dispersive device to ...
Photonic Technique for the Measurement of Frequency and Power of Multiple Microwave Signals

Vidal Rodriguez, Borja; Mengual Chulia, Teresa; Martí Sendra, Javier (Institute of Electrical and Electronics Engineers, 2010-11)

[EN] An optical approach to simultaneously measure the frequency and power of several microwave signals is presented and demonstrated. The system is based on the processing of an inter-ferogram generated by integrating the ...
Reconfigurable Activation Functions in Integrated Optical Neural Networks

Rausell-Campo, Jose Roberto; Pérez-López, Daniel (Institute of Electrical and Electronics Engineers, 2022-07)

[EN] The implementation of nonlinear activation functions is one of the key challenges that optical neural networks face. To the date, different approaches have been proposed, including switching to digital implementations, ...
Single bandpass photonic microwave filter based on a notch ring resonator

Palací López, Jesús; Villanueva Ibáñez, Guillermo Eduardo; Galán Conejos, José Vicente; Martí Sendra, Javier; Vidal Rodriguez, Borja (Institute of Electrical and Electronics Engineers (IEEE), 2010-09-01)

[EN] A novel tunable single bandpass photonic microwave filter is proposed. It is based on optically filtering one of the sidebands of a phase-modulated optical carrier by means of the notch response of a silicon-on-insulator ...
Terahertz Radiation Shaping Based on Third-Order Dispersion and Self-Phase Modulation in Standard Single-Mode Optical Fiber

Palací López, Jesús; Vidal Rodriguez, Borja (Springer Verlag (Germany), 2012-06)

Third-order dispersion and self-phase modulation in standard single-mode fibers are employed in a fiber-based THz time domain spectroscopy system for radiation shaping. Ultra-short optical pulses are converted into trains ...
Tunable Optical Delay Line based on Single-Sideband Suppressed-Carrier Modulation

Palací López, Jesús; Vidal Rodriguez, Borja (Institute of Electrical and Electronics Engineers (IEEE), 2013-01-01)

A technique to electrically control the time shift of ultrashort optical pulses without the generation of replicas is demonstrated on the basis of frequency-to-time conversion and single-sideband suppressed-carrier modulation ...
Tunable photonic microwave filter with single bandpass based on a phase-shifted Fiber Bragg Grating

Palací López, Jesús; Pérez Millán, Pedro; Villanueva Ibáñez, Guillermo Eduardo; Cruz, José L.; Andrés, Miguel V.; Martí Sendra, Javier; Vidal Rodriguez, Borja (Institute of Electrical and Electronics Engineers (IEEE), 2010-10-01)

A novel tunable photonic microwave single bandpass filter based on the optical resonance originated by a local phase shift introduced in the periodic structure of a fiber Bragg grating is proposed. Dynamic control of the ...
Tunable True-Time Delay Operation in A Dispersion-Engineered Few-Mode Fiber

Nazemosadat-Arsanjani, Seyedeh Bentolhoda; Gasulla Mestre, Ivana (IEEE, 2020-11-26)

[EN] We present a simple few-mode fiber design as a promising platform to implement tunable sampled true-time delay lines for radiofrequency signal processing. To the best of our knowledge, this is the first few-mode fiber ...
Wide-Band Nulling System for Antenna Array based on a Photonic Microwave Filter and Optical Delay Lines

Mengual Chulia, Teresa; Vidal Rodriguez, Borja; Martí Sendra, Javier (Elsevier, 2009-10-01)

[EN] A nulling system for phased array antennas with broad bandwidth and reduced complexity is presented. The system is based on combining the output of an optical beamforming network with an optical transversal filter ...