Erica Sánchez

Universitat Politècnica de València

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J. Capmany

Universitat Politècnica de València

Daniel Pérez

iPronics Programmable Photonics (Spain)

Prometheus DasMahapatra

Universitat Politècnica de València

Ana M. Gutierrez

Universitat Politècnica de València

Aitor López Hernández

Universitat Politècnica de València

Diego Pérez‐Galacho

Universitat Politècnica de València

R.M. Edwards

Loughborough University

Andrés Macho

Universitat Politècnica de València

Juan Pêdro Solano Fernández

iPronics Programmable Photonics (Spain)

J. Benitez

iPronics Programmable Photonics (Spain)

Cooperative Institutions

iPronics Programmable Photonics (Spain)

Universitat Politècnica de València

Photonics (United States)

National and Kapodistrian University of Athens

Universidad Pedro de Valdivia

University of West Attica

University of the Aegean

Huawei Technologies (Canada)

Ipsen (Spain)

Instituto Politécnico Nacional

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CRISIS: A System for Risk Management

Systems (2012)

Erica Sánchez Alejandro Acquesta

In a situation of an unexpected catastrophe, uncertainty and demand for information are constant. In such a disaster scenario, the CRISIS system arises as a tool to contribute to previous coordination, procedure validation, exercise execution, a good and frequent communication among organizations, and weakness and threat assessment for an appropriate risk management. It offers a wide variety of tools for online communication, consultation and collaboration that, up to this day, includes cartography, tasks, resources, news, forums, instant messaging and chat. As a complement, mathematical models for training and emergency management are being researched and developed. For Argentinean society, it is a necessity to switch from the current handcrafted, bureaucratic emergency management method to a decision-making management model. Previous coordination, exercise execution, a fluid communication among institutions, and threats and weaknesses assessment are required for a proper risk management. With that goal in mind, it is important to reduce confusion, avoid the duplication of efforts to fulfill the same tasks, and have access to a complete vision of the situation, generated from the data of all the organizations taking part. The CRISIS system is a secure web application, accessible to every node in a network formed by the organizations which have complementary responsibilities during prevention and response. It offers a wide variety of tools for online communication, consultation and collaboration that, up to this day, includes cartography, tasks, media (organization and resources), news, forums, instant messaging and chat. As a complement, mathematical models for training and emergency management are being researched and developed. Currently, there are toxicological and epidemiological emergency models available. The present paper analyses, from the perspectives related to risk management for emergencies and disasters, the strengths and weaknesses of the CRISIS system to be used for prevention, response and recoveries in the case of a catastrophe.

Bureaucracy

Crisis Management

10.3390/systems1010003

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Citations (14)

Photonic Neuromorphic Accelerator for Convolutional Neural Networks based on an Integrated Reconfigurable Mesh

arXiv (Cornell University) (2024)

Aris Tsirigotis Gerge Sarantoglou Stavros Deligiannidis Erica Sánchez Ana Gutiérrez

In this work, we present and experimentally validate a passive photonic-integrated neuromorphic accelerator that uses a hardware-friendly optical spectrum slicing technique through a reconfigurable silicon photonic mesh. The proposed scheme acts as an analogue convolutional engine, enabling information preprocessing in the optical domain, dimensionality reduction and extraction of spatio-temporal features. Numerical results demonstrate that utilizing only 7 passive photonic nodes, critical modules of a digital convolutional neural network can be replaced. As a result, a 98.6% accuracy on the MNIST dataset was achieved, with a power consumption reduction of at least 26% compared to digital CNNs. Experimental results confirm these findings, achieving 97.7% accuracy with only 3 passive nodes.

Neuromorphic engineering

10.48550/arxiv.2405.06434

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Citations (1)

On achieving secure seamless mobility

Erica Sánchez R.M. Edwards

The emergence of new technologies brings alongside innovative characteristics and, therefore, different requirements to the ones already defined in established technologies. This was evident with the appearance of wireless networks and the introduction of the mobility concept. Existing systems were created to work in a fixed and sometimes portable environment and, although it is possible to apply them in a wireless mobile environment, it is foreseen that they will have an impact in the performance and functionality of the system, threatening the absolute usability of the advantages provided by this new technology. This document presents the results of the experiment to quantify the latency introduced by the IP security protocol and introduces the mobile secure communication channel (MSCC), a novel protocol that provides the services of registration request authentication, key exchange, integrity, data origin authentication, anti-replay protection and confidentiality for the established of a secure communication channel in a wireless mobile environment, therefore representing a first step towards the achievement of secure seamless mobility.

Wireless Application Protocol

Mutual authentication

10.1109/mwcn.2002.1045829

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Citations (0)

Dual-Drive Directional Couplers for Programmable Integrated Photonics

Daniel Pérez Ana M. Gutierrez Erica Sánchez Prometheus DasMahapatra J. Capmany

We propose and experimentally demonstrate the use of directional couplers with an independent phase actuator on each waveguide. We show the configurations that allow the setting of the splitting ratio and the phase in a silicon-nitride platform and their applications in programable photonic integrated circuits.

Waveguide

Integrated Optics

10.1109/phosst.2019.8794902

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Citations (3)

Optimisation of the establishment of secure communication channels in wireless mobile networks

Erica Sánchez R.M. Edwards

Existing systems were created to work in a fixed and sometimes portable environment and, although it is possible to applied them in a wireless mobile environment, it is foreseen that they will have an impact in the performance and functionality of the system, threatening the absolute usability of the advantages provided by this new technology. Of our interest is the Internet Protocol Security (IPSEC), used mainly to create secure communications through public network infrastructure, i.e. Internet, by associating security parameters with the node's network address. This document introduces Mobile Virtual Private Network (MVPN), a novel protocol that provides the services of registration request authentication, key exchange, integrity, data origin authentication, anti-replay protection and confidentiality for the establishment of Secure Communication Channels in a wireless mobile environment, therefore representing a first step towards the optimisation of IPSEC.

IPsec

10.1109/ipdps.2002.1016633

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Citations (4)

Modeling amplified arbitrary filtered Microwave Photonic links and systems

Erica Sánchez Daniel Pérez Prometheus DasMahapatra J. Capmany

We report preliminary results of an analytical model for amplified arbitrary filtered MWP systems. That provides the expressions of the main FOMs for intensity modulation direct detection. It contemplates the cases of power, intermediate and pre amplification. Model is applied to two specific cases, a long MWP link and a MWP reconfigurable filter implemented by means of a programmable waveguide mesh PIC.

Modulation (music)

Waveguide filter

Waveguide

10.23919/mwp48676.2020.9314401

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Citations (1)

Modeling amplified arbitrary filtered microwave photonic links and systems

Optics Express (2021)

Erica Sánchez Daniel Pérez Prometheus DasMahapatra J. Capmany

Microwave photonic (MWP) links and systems will have more losses as their complexities increase and there will be a need for incorporating optical amplification. Here, we report results of an analytical model developed for amplified arbitrary filtered MWP systems that provides the expressions of the main figures of merit for intensity modulation direct detection. It contemplates the cases of power, intermediate and pre amplification. The model is applied to a long MWP link and then it is evaluated in a MWP reconfigurable filter implemented by means of a programmable waveguide mesh photonic integrated circuit.

Modulation (music)

Figure of Merit

10.1364/oe.423613

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Citations (8)

Programmable True Time Delay Lines Using Integrated Waveguide Meshes

Journal of Lightwave Technology (2018)

Daniel Pérez Erica Sánchez J. Capmany

We analyze and explore the potential that waveguide-mesh-based architectures used in programmable photonic integrated circuits can be configured to enable true time optical delay lines, which can find applications in different microwave photonics functionalities, such as beamforming and optical filtering. We also propose and experimentally demonstrate an alternative standalone tunable basic unit (TBU) architecture where its internal coupling device is implemented by means of a dual-drive tunable directional coupler (DD-TDC) that performs independent amplitude beam splitting and phase shifting. Compared to the previous alternatives based on 3-dB balanced Mach-Zehnder interferometers, the DD-TDC reduces by more than two times the insertion losses of TBUs enabling the potential realization of larger meshes with a three-fold enhanced step-time resolution. Bandwidth and robustness analysis are also considered.

True time delay

Robustness

Beam propagation method

Waveguide

Optical engineering

10.1109/jlt.2018.2831008

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Citations (41)

Simulation of Highly Coupled Programmable Photonic Circuits

Journal of Lightwave Technology (2022)

Erica Sánchez Aitor López Hernández Daniel Pérez

Multipurpose programmable photonic processors have recently emerged as a solution to provide cost-effective and general-purpose functionality for a myriad of photonic applications. Inspired by programmable electronics, the design of these devices lies on generic photonic integrated hardware based on two-dimensional waveguide meshes comprised of tunable couplers and phase actuators. Extending these meshes allows the implementation of more complex structures and functionalities. However, there are design trade-offs arising from parasitic effects coming from fabrication and their dynamic operation. Since the time spent during the design cycle and validation of these complex systems usually involves a costly, risky and time-consuming processes, this work proposes and compares two simulation tools to predict the spectral response of any 2D integrated photonic mesh circuit composed of an arbitrary number of coupled cells. These methods reduce development costs, speed up the growth of new circuit designs, and are a fundamental tool for the development of programmable photonic libraries.

10.1109/jlt.2022.3194973

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Citations (10)

General purpose programmable photonic processor for advanced radiofrequency applications

Research Square (Research Square) (2023)

J. Capmany Daniel Pérez Ana Gutiérrez David Sánchez Aitor López Hernández

Abstract Programmable photonic circuits manipulate the flow of light on a chip by electrically controlling a set of tunable analog gates connected by optical waveguides 1,2 . Light is distributed and spatially rerouted to implement various linear functions by interfering signals along different paths. A general-purpose photonic processor can be built by integrating this flexible hardware in a technology stack comprising an electronic monitoring and controlling layer and a software layer for resource control and programming 3,4 . This processor can leverage the unique properties of photonics in terms of ultra-high bandwidth, high-speed operation, and low power consumption while operating in a complementary and synergistic way with electronic processors. These features are key in applications such as next-generation 5/6G wireless systems, autonomous driving, and aerospace, where a number of functionalities such as reconfigurable filtering, frequency conversion, arbitrary waveform generation, and beamforming are currently provided by microwave photonic subsystems 5 , which cannot be scaled down. Here we report the first general-purpose programmable processor with the remarkable capability to implement all the required basic functionalities of a microwave photonic system by suitable programming of its resources. The processor is fabricated in a silicon photonics platform and incorporates for the first time to our knowledge the full photonic/electronic and software stack. Our findings indicate that this processor can work in frequency ranges of up to 100 GHz featuring power consumption values in the order of a few watts. The possibility of implementing all the functionalities with a single chip opens the path to scale down the processor size to dimensions compatible with the requirements of next-generation millimeter-wave base stations and satellites 6,7 . We anticipate that this photonic processor will be useful in an unconstrained number of applications such as photonic computing 8 , advanced communications 9 , lidar 10, and microwave spectroscopy 11

10.21203/rs.3.rs-3403077/v1

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Citations (3)