Search results for: Francesco Prudenzano

Items from 1 to 20 out of 21 results

article

Mid-infrared guided photoluminescence from integrated Pr3+-doped selenide ridge waveguides

Loïc Bodiou, Florent Starecki, Jonathan Lemaitre, Virginie Nazabal, more

Optical Materials > 2018 > 75 > C > 109-115

Praseodymium-doped selenide thin films are deposited by radio frequency magnetron sputtering on thermally oxidized silicon wafers and undoped selenide layers. Ridge waveguides are then processed using photolithography and dry etching techniques. Under optical pumping at 1.55 μm, broadband guided mid-infrared photoluminescence is recorded for the first time for wavelengths above 4 μm from rare earth-doped...

chapter

Optical microresonators for biomedicine applications

Dario Laneve, Mario Christian Falconi, Giuseppe Palma, Antonio Crudele, more

2017 19th International Conference on Transparent Optical Networks (ICTON) > 1 - 5

2017 19th International Conference on Transparent Optical Networks (ICTON)

The paper, after a brief review on optical microresonators for biomedicine, illustrates a set-up based on a praseodymium doped microdisk. It is more deeply described and a few design details are reported. This compact amplifier is based on chalcogenide Pr³⁺-doped microdisk coupled to two ridge waveguides. The gain close to G = 7.9 dB is simulated for an input signal power of −30 dBm at the wavelength...

article

Dysprosium-Doped Chalcogenide Master Oscillator Power Amplifier (MOPA) for Mid-IR Emission

Mario Christian Falconi, Giuseppe Palma, Florent Starecki, Virginie Nazabal, more

Journal of Lightwave Technology > 2017 > 35 > 2 > 265 - 273

The paper describes the design of a medium infrared fiber laser based on a dysprosium-doped chalcogenide glass

$\text{Dy}^{3+}: \text{Ga}_{5}\text{Ge}_{20}\text{Sb}_{10}\text{S}_{65}$

. To obtain a high efficiency, the fiber laser is followed by an optical amplifier. The optimized optical source exploits a master oscillator power amplifier (MOPA) configuration. The MOPA pump and signal wavelengths...

article

Design of an Efficient Pumping Scheme for Mid-IR Dy³⁺:Ga₅Ge₂₀Sb₁₀S₆₅ PCF Fiber Laser

Mario Christian Falconi, Giuseppe Palma, Florent Starecki, Virginie Nazabal, more

IEEE Photonics Technology Letters > 2016 > 28 > 18 > 1984 - 1987

This letter illustrates the design of a novel medium infrared (Mid-IR) laser based on a photonic crystal fiber made of dysprosium-doped chalcogenide glass, Dy³⁺:Ga₅Ge₂₀Sb₁₀S₆₅. In order to perform a realistic investigation, the simulation is performed by taking into account the spectroscopic parameters measured on the rare earth-doped glass sample. The simulated results show that an optical beam emission...

article

Compact double‐layer substrate integrated waveguide magic Tee for X‐band applications

Giuseppe Venanzoni, Davide Mencarelli, Antonio Morini, Marco Farina, more

Microwave and Optical Technology Letters > 58 > 4 > 932 - 936

A substrate integrated waveguide Magic Tee with very compact size and operating over a wide band is proposed. The circuit is made of two stacked substrates connected by cutting a small aperture between them. This solution presents slightly higher complexity compared to a single substrate magic Tee but it avoids the radiation losses because the circuit is completely closed. A simple and effective procedure...

article

Modeling of Radiation Effects in Silicon Photonic Devices

Francesco De Leonardis, Benedetto Troia, Carlo Edoardo Campanella, Francesco Prudenzano, more

IEEE Transactions on Nuclear Science > 2015 > 62 > 5-2 > 2155 - 2168

The influence of high energy radiations on the performance of silicon-on-insulator photonic devices, such as straight waveguides, ring resonators and Raman lasers based on resonant microcavities, has been investigated theoretically in the near infrared. The modeling is based on a generalized full-vectorial wave equation system which also includes deep defect rate equations. Simulation results are...

article

Compact substrate integrated waveguide six‐port directional coupler for X‐band applications

Giuseppe Venanzoni, Davide Mencarelli, Antonio Morini, Marco Farina, more

Microwave and Optical Technology Letters > 57 > 11 > 2589 - 2592

A substrate integrated waveguide six‐port directional coupler is designed and characterized. The circuit exploits a very compact size and good reflection and transmission characteristics, as it exhibits both return loss and isolation higher than 15 dB over a 13% bandwidth. The device is made by connecting all ports to a single junction which mixes all signals. Some prototypes have been built and experimental...

chapter

Glass-ceramics for photonics: Laser material processing

Clara Goyes, Efrain Solarte, Sreeramulu Valligatla, Andrea Chiappini, more

2015 17th International Conference on Transparent Optical Networks (ICTON) > 1 - 4

2015 17th International Conference on Transparent Optical Networks (ICTON)

Transparent glass-ceramics, activated by luminescent species, present an important class of photonic materials because their specific optical, spectroscopic and structural properties. Several top-down and bottom-up techniques have been developed for transparent glass ceramic fabrication. Among them, laser material processing plays an important role and many significant results have been obtained in...

chapter

Glass-ceramics for photonics: Advances and perspectives

Anna Lukowiak, Iustyna Vasilchenko, Simone Normani, Andrea Chiappini, more

2014 16th International Conference on Transparent Optical Networks (ICTON) > 1 - 4

2014 16th International Conference on Transparent Optical Networks (ICTON)

Glass-ceramics are nanocomposite materials which offer specific characteristics of capital importance in photonics. This kind of two-phase materials is constituted by nanocrystals embedded in a glass matrix and the respective composition and volume fractions of crystalline and amorphous phase determine the properties of the glass-ceramic. Among these properties transparency is crucial, in particular...

article

Single‐layer standalone wideband substrate‐integrated waveguide directional coupler

Giuseppe Venanzoni, Davide Mencarelli, Antonio Morini, Marco Farina, more

Microwave and Optical Technology Letters > 56 > 5 > 1141 - 1144

The design and characterization of a single‐layer wideband substrate integrated waveguide 3‐dB standalone directional coupler are described. The device exhibits a bandwidth of 2 GHz, ranging from 10.7 to 12.7 GHz, and both return loss and isolation better than 15 dB. The coupler has been built using a TACONIC RF‐35 A2 substrate. A very good agreement between simulations and experimental results is...

article

Optimization of the Design of High Power $\hbox{Er}^{3+}/\hbox{Yb}^{3+}$ -Codoped Fiber Amplifiers for Space Missions by Means of Particle Swarm Approach

Luciano Mescia, Sylvain Girard, Pietro Bia, Thierry Robin, more

IEEE Journal of Selected Topics in Quantum Electronics > 2014 > 20 > 5 > 1 - 8

In this paper, the optimization of the design of rare earth–doped cladding-pumped fiber amplifiers is investigated to improve their performance with respect to the constraints associated with space missions. This work is carried out by means of a computer code based on particle swarm optimization (PSO) and rate equation model. We consider a fiber that is radiation tolerant at the space dose levels,...

chapter

SIW cavity-backed patch antenna for Ku band applications

Onofrio Losito, Luciano Mescia, Davide Mencarelli, Giuseppe Venanzoni, more

2013 7th European Conference on Antennas and Propagation (EuCAP) > 3095 - 3098

2013 7th European Conference on Antennas and Propagation (EuCAP)

A broadband cavity-backed microstrip patch antenna in Ku Band is designed. In particular, in order to increase the operating bandwidth a modified rectangular patch having truncated corners and two cuts in the lateral sides has been conceived. The substrate integrated waveguide (SIW) technology is chosen to realize the cavity below the patch allowing low-cost implementation, fast prototyping, and precise...

chapter

X-Band SIW cavity-backed patch antenna for radar applications

Onofrio Losito, Luciano Mescia, Michele A. Chiapperino, Tiziana Castellano, more

2013 European Microwave Conference > 199 - 202

2013 European Microwave Conference (EuMC)

A Substrate Integrated Waveguide (SIW) cavity-backed microstrip patch antenna for radar applications operating in X Band is designed. In order to increase the bandwidth, the SIW technology is used to build a circular cavity which surrounds a modified rectangular patch. The modified patch has truncated corners and two cuts in the lateral sides. Accurate electromagnetic investigation has been performed...

chapter

Design of rare earth doped multicore fiber lasers and amplifiers

Michele Surico, Annalisa Di Tommaso, Pietro Bia, Luciano Mescia, more

2012 14th International Conference on Transparent Optical Networks (ICTON) > 1 - 5

2012 14th International Conference on Transparent Optical Networks (ICTON)

A home-made computer code has been implemented to design high power ytterbium doped fiber lasers by following different techniques. The goal is to maximize the effective mode area by maintaining a good beam quality. As a preliminary simulation result, a novel aperiodic fiber lattice, very promising in order to construct high power and single mode lasers, has been identified. The laser obtained by...

article

Design of optical antenna for solar energy collection

Michele Gallo, Luciano Mescia, Onofrio Losito, Michele Bozzetti, more

Energy > 2012 > 39 > 1 > 27-32

In this paper, an antenna array is designed in order to transform the thermal energy, provided by the Sun and re-emitted from the Earth, in electricity. The proposed antenna array is constituted by four square spirals of gold printed on a low cost dielectric substrate. A microstrip line, embedded into the substrate, is used to feed the array and to collect the thermal radiation. The dispersive behavior...

article

Refinement and design of rare earth doped photonic crystal fibre amplifier using an ANN approach

Luciano Mescia, Girolamo Fornarelli, Donato Magarielli, Francesco Prudenzano, more

Optics and Laser Technology > 2011 > 43 > 7 > 1096-1103

A number of numerical and analytical methods with different complexity can be exploited to analyse fibre amplifiers. Conventional approaches make the refinement and design of the devices extremely time consuming, especially when several design parameters have to be simultaneously optimised to obtain the desired performance in terms of gain and noise figure.In order to tackle this issue, a method based...

article

Long-period gratings for the optimization of cladding-pumped microstructured optical fiber laser

Luciano Mescia, Tommaso Palmisano, Michele Surico, Francesco Prudenzano

Optical Materials > 2010 > 33 > 2 > 236-240

The design of a laser constituted by an ytterbium doped, double-cladding microstructured optical fiber (DCMOF) with an optimized optical coupler inscribed in the doped core region is illustrated. The coupler is constituted by a long-period grating (LPG) which increases the pump power transfer from the inner cladding modes towards the fundamental core mode. A home-made numerical code solving the coupled-mode...

article

Theoretical study of cascade laser in erbium-doped chalcogenide glass fibers

Francesco Prudenzano, Luciano Mescia, Luca Allegretti, Virginie Moizan, more

Optical Materials > 2010 > 33 > 2 > 241-245

A theoretical investigation of an innovative cascade laser source is performed. The main goal of the work is the design of a continuous-wave (CW) photonic crystal fiber (PCF) laser, based on an erbium-doped chalcogenide glass. Due to the comparable lifetimes of the ⁴ I _13/2 , ⁴ I _11/2 and ⁴ I _9/2 erbium energy levels, the simultaneous emissions at the...

article

An Optical Thermometer Exploiting Periodically Poled Lithium Niobate for Monitoring the Pantographs of High-Speed Trains

Tommaso Del Rosso, Giancarlo Margheri, Stefano Sottini, Silvana Trigari, more

IEEE Sensors Journal > 2007 > 7 > 3 > 417 - 425

Optical thermometers have been widely investigated. Here, the temperature behavior of second harmonic generation (SHG) in periodically poled lithium niobate (PPLN) substrates is analyzed; indeed, the QPM tuning in PPLN devices and the obtained SHG efficiency depend on the crystal thermal expansion and dispersion, particularly in the case of guided propagation. Therefore, such devices are suitable...

article

Optimization and Characterization of Rare-Earth-Doped Photonic-Crystal-Fiber Amplifier Using Genetic Algorithm

Francesco Prudenzano, Luciano Mescia, Antonella D'Orazio, Marco De Sario, more

Journal of Lightwave Technology > 2007 > 25 > 8 > 2135 - 2142

<para> A genetic-algorithm (GA) procedure has been <emphasis emphasistype="boldital">ad hoc</emphasis> implemented to obtain a tool for both design and characterization of rare-earth-doped optical amplifiers and lasers. In particular, the routines performing the selection, crossover, mutation, and elitism operations have been written with the aim to investigate the optimal...

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INFONA - science communication portal

Search results for: Francesco Prudenzano

Mid-infrared guided photoluminescence from integrated Pr3+-doped selenide ridge waveguides

Optical microresonators for biomedicine applications

Dysprosium-Doped Chalcogenide Master Oscillator Power Amplifier (MOPA) for Mid-IR Emission

Design of an Efficient Pumping Scheme for Mid-IR Dy³⁺:Ga₅Ge₂₀Sb₁₀S₆₅ PCF Fiber Laser

Compact double‐layer substrate integrated waveguide magic Tee for X‐band applications

Modeling of Radiation Effects in Silicon Photonic Devices

Compact substrate integrated waveguide six‐port directional coupler for X‐band applications

Glass-ceramics for photonics: Laser material processing

Glass-ceramics for photonics: Advances and perspectives

Single‐layer standalone wideband substrate‐integrated waveguide directional coupler

Optimization of the Design of High Power $\hbox{Er}^{3+}/\hbox{Yb}^{3+}$ -Codoped Fiber Amplifiers for Space Missions by Means of Particle Swarm Approach

SIW cavity-backed patch antenna for Ku band applications

X-Band SIW cavity-backed patch antenna for radar applications

Design of rare earth doped multicore fiber lasers and amplifiers

Design of optical antenna for solar energy collection

Refinement and design of rare earth doped photonic crystal fibre amplifier using an ANN approach

Long-period gratings for the optimization of cladding-pumped microstructured optical fiber laser

Theoretical study of cascade laser in erbium-doped chalcogenide glass fibers

An Optical Thermometer Exploiting Periodically Poled Lithium Niobate for Monitoring the Pantographs of High-Speed Trains

Optimization and Characterization of Rare-Earth-Doped Photonic-Crystal-Fiber Amplifier Using Genetic Algorithm

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