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Papers by Miguel A Muriel

Journal of Lightwave Technology, 2017

The longitudinal offset technique permits to improve the accuracy of the coupling coefficients of... more The longitudinal offset technique permits to improve the accuracy of the coupling coefficients of integrated directional couplers and provides designs that can be easily implemented with current fabrication tolerances. In this work, we address the additional degree of freedom offered by this technology in order to tailor the differential group delay in coupled-resonator optical filters. We present the characterization of several devices exploiting this feature and we discuss their potential applications.

Optics Express, 2008

We propose and analyze several simple all-pass spectrallyperiodic optical structures, in terms of... more We propose and analyze several simple all-pass spectrallyperiodic optical structures, in terms of accuracy and robustness, for the implementation of repetition rate multipliers of periodic pulse train with uniform output train envelope, finding optimum solutions for multiplication factors of 3, 4, 6, and 12.

This paper presents some ideas about a new neural network architecture that can be compared to a ... more This paper presents some ideas about a new neural network architecture that can be compared to a Taylor analysis when dealing with patterns. Such architecture is based on lineal activation functions with an axo-axonic architecture. A biological axo-axonic connection between two neurons is defined as the weight in a connection in given by the output of another third neuron. This idea can be implemented in the so called Enhanced Neural Networks in which two Multilayer Perceptrons are used; the first one will output the weights that the second MLP uses to computed the desired output. This kind of neural network has universal approximation properties even with lineal activation functions. There exists a clear difference between cooperative and competitive strategies. The former ones are based on the swarm colonies, in which all individuals share its knowledge about the goal in order to pass such information to other individuals to get optimum solution. The latter ones are based on genet...

arXiv: Optics, 2006

In this letter we present a new technique for pulse shaping. The desired pulse is shaped by two a... more In this letter we present a new technique for pulse shaping. The desired pulse is shaped by two apodized chirped fiber Bragg gratings which dispersions are adjusted to be cancelled. This technique exploits the well-known property of linearly-chirped gratings, in which the apodization (amplitude) grating profile maps its spectral response. This technique presents inherent advantages of chirped fiber Bragg gratings and direct design in frequency domain.

Abstract: This paper presents some ideas about a new neural network architecture that can be comp... more Abstract: This paper presents some ideas about a new neural network architecture that can be compared to a Taylor analysis when dealing with patterns. Such architecture is based on lineal activation functions with an axo-axonic architecture. A biological axo-axonic connection between two neurons is defined as the weight in a connection in given by the output of another third neuron. This idea can be implemented in the so called Enhanced Neural Networks in which two Multilayer Perceptrons are used; the first one will output the weights that the second MLP uses to computed the desired output. This kind of neural network has universal approximation properties even with lineal activation functions. There exists a clear difference between cooperative and competitive strategies. The former ones are based on the swarm colonies, in which all individuals share its knowledge about the goal in order to pass such information to other individuals to get optimum solution. The latter ones are base...

2015 European Conference on Optical Communication (ECOC), 2015

In this work, a scheme that relies on phase-to-intensity (PM-IM) conversion for high order UWB pu... more In this work, a scheme that relies on phase-to-intensity (PM-IM) conversion for high order UWB pulses generation is proposed and demonstrated by using a customized optical filter. The obtained triplet pulse reveals high efficiency and proper fitting for FCC standards.

Programmable Retiming of an Optical Clock Signal Using the Temporal Talbot Effect

IEEE Photonics Technology Letters

IEEE Photonics Technology Letters, 2016

A flexible pulse shaping photonic structure that is capable of generating train pulses that hold ... more A flexible pulse shaping photonic structure that is capable of generating train pulses that hold pulse widths of approximately 16-ps and a Gaussian profile at a repetition rate of 20 GHz is proposed and experimentally demonstrated. The key component is a monolithically integrated reflective SOA-EAM device that operates within the 1.55 u,m frequency band. The generated pulses have low chirp, which is experimentally measured using a novel linear pulse characterization technique. The pulses have the potential to be used as seed pulses for optical ultra-wide band photonic communications systems.

Estudio de las deflexiones transversales electro y magnetoópticas en cristales líquidos

Microstrip Chirped Delay Lines based on Photonic Band-Gap Structures

32nd European Microwave Conference, 2002, 2002

Microstrip Chirped Delay Lines based on Photonic Band-Gap Structures

32nd European Microwave Conference, 2002, 2002

Instabilities in hybrid optical bistable devices with nonlinear feedback

Conference on Lasers and Electro-Optics

Real-time optical spectrum analyzer

Conference on Lasers and Electro-Optics

Single and double amplified recirculatin delay lines as fibre-optic filters

Optical Code Division Multiple Access coder/decoder pairs based on temporal optical pulse shaping with fiber Bragg Gratings and electrooptic modulators

2010 12th International Conference on Transparent Optical Networks, 2010

Introduction to the special issue

Fiber and Integrated Optics

Nuevos materiales para nuevas tecnologías electrónicas

Cálculo de las características de transmisión de una fibra de índice gradual mediante el empleo de su matriz ABCD

Reorientación inducida ópticamente en una estructura cilíndrica hemeotrópica de cristal líquido

Digital light beam deflector with liquid cristal (1980)

Journal of Lightwave Technology, 2017

The longitudinal offset technique permits to improve the accuracy of the coupling coefficients of... more The longitudinal offset technique permits to improve the accuracy of the coupling coefficients of integrated directional couplers and provides designs that can be easily implemented with current fabrication tolerances. In this work, we address the additional degree of freedom offered by this technology in order to tailor the differential group delay in coupled-resonator optical filters. We present the characterization of several devices exploiting this feature and we discuss their potential applications.

Optics Express, 2008

We propose and analyze several simple all-pass spectrallyperiodic optical structures, in terms of... more We propose and analyze several simple all-pass spectrallyperiodic optical structures, in terms of accuracy and robustness, for the implementation of repetition rate multipliers of periodic pulse train with uniform output train envelope, finding optimum solutions for multiplication factors of 3, 4, 6, and 12.

This paper presents some ideas about a new neural network architecture that can be compared to a ... more This paper presents some ideas about a new neural network architecture that can be compared to a Taylor analysis when dealing with patterns. Such architecture is based on lineal activation functions with an axo-axonic architecture. A biological axo-axonic connection between two neurons is defined as the weight in a connection in given by the output of another third neuron. This idea can be implemented in the so called Enhanced Neural Networks in which two Multilayer Perceptrons are used; the first one will output the weights that the second MLP uses to computed the desired output. This kind of neural network has universal approximation properties even with lineal activation functions. There exists a clear difference between cooperative and competitive strategies. The former ones are based on the swarm colonies, in which all individuals share its knowledge about the goal in order to pass such information to other individuals to get optimum solution. The latter ones are based on genet...

arXiv: Optics, 2006

In this letter we present a new technique for pulse shaping. The desired pulse is shaped by two a... more In this letter we present a new technique for pulse shaping. The desired pulse is shaped by two apodized chirped fiber Bragg gratings which dispersions are adjusted to be cancelled. This technique exploits the well-known property of linearly-chirped gratings, in which the apodization (amplitude) grating profile maps its spectral response. This technique presents inherent advantages of chirped fiber Bragg gratings and direct design in frequency domain.

Abstract: This paper presents some ideas about a new neural network architecture that can be comp... more Abstract: This paper presents some ideas about a new neural network architecture that can be compared to a Taylor analysis when dealing with patterns. Such architecture is based on lineal activation functions with an axo-axonic architecture. A biological axo-axonic connection between two neurons is defined as the weight in a connection in given by the output of another third neuron. This idea can be implemented in the so called Enhanced Neural Networks in which two Multilayer Perceptrons are used; the first one will output the weights that the second MLP uses to computed the desired output. This kind of neural network has universal approximation properties even with lineal activation functions. There exists a clear difference between cooperative and competitive strategies. The former ones are based on the swarm colonies, in which all individuals share its knowledge about the goal in order to pass such information to other individuals to get optimum solution. The latter ones are base...

2015 European Conference on Optical Communication (ECOC), 2015

In this work, a scheme that relies on phase-to-intensity (PM-IM) conversion for high order UWB pu... more In this work, a scheme that relies on phase-to-intensity (PM-IM) conversion for high order UWB pulses generation is proposed and demonstrated by using a customized optical filter. The obtained triplet pulse reveals high efficiency and proper fitting for FCC standards.

Programmable Retiming of an Optical Clock Signal Using the Temporal Talbot Effect

IEEE Photonics Technology Letters

IEEE Photonics Technology Letters, 2016

A flexible pulse shaping photonic structure that is capable of generating train pulses that hold ... more A flexible pulse shaping photonic structure that is capable of generating train pulses that hold pulse widths of approximately 16-ps and a Gaussian profile at a repetition rate of 20 GHz is proposed and experimentally demonstrated. The key component is a monolithically integrated reflective SOA-EAM device that operates within the 1.55 u,m frequency band. The generated pulses have low chirp, which is experimentally measured using a novel linear pulse characterization technique. The pulses have the potential to be used as seed pulses for optical ultra-wide band photonic communications systems.

Estudio de las deflexiones transversales electro y magnetoópticas en cristales líquidos

Microstrip Chirped Delay Lines based on Photonic Band-Gap Structures

32nd European Microwave Conference, 2002, 2002

Microstrip Chirped Delay Lines based on Photonic Band-Gap Structures

32nd European Microwave Conference, 2002, 2002

Instabilities in hybrid optical bistable devices with nonlinear feedback

Conference on Lasers and Electro-Optics

Real-time optical spectrum analyzer

Conference on Lasers and Electro-Optics

Single and double amplified recirculatin delay lines as fibre-optic filters

Optical Code Division Multiple Access coder/decoder pairs based on temporal optical pulse shaping with fiber Bragg Gratings and electrooptic modulators

2010 12th International Conference on Transparent Optical Networks, 2010

Introduction to the special issue

Fiber and Integrated Optics

Nuevos materiales para nuevas tecnologías electrónicas

Cálculo de las características de transmisión de una fibra de índice gradual mediante el empleo de su matriz ABCD

Reorientación inducida ópticamente en una estructura cilíndrica hemeotrópica de cristal líquido

Digital light beam deflector with liquid cristal (1980)