Papers by Massimo Artiglia
Frontiers in Optics + Laser Science APS/DLS, 2019
Here we present a daylight QKD system using silicon photonics. The system exhibits continuous day... more Here we present a daylight QKD system using silicon photonics. The system exhibits continuous daytime operation, outperforms comparable systems by two orders of magnitude, and represents a promising resource for future satellite missions.
2014 The European Conference on Optical Communication (ECOC), 2014
Optical Fiber Technology, 1996
A novel experimental technique for the measurement of the nonlinear refractive index coefficient,... more A novel experimental technique for the measurement of the nonlinear refractive index coefficient,n 2 , based on the detection of self-phase modulation phase shift by means of an all-fiber Sagnac interferometer, is proposed. Measurements performed on ...
Journal of Lightwave Technology, 1989
M. ARTIGLIA, G. COPPA, P. DI VITA, M. POTENZA, AND A. SHARMA (Invited Puper) ... Abstract-The rol... more M. ARTIGLIA, G. COPPA, P. DI VITA, M. POTENZA, AND A. SHARMA (Invited Puper) ... Abstract-The role of the mode field diameter in the characterization of single-mode fibers is examined. The most relevant definitions of this parameter are reviewed and a ...
LEOS 1993 Summer Topical Meeting Digest on Optical Microwave Interactions/Visible Semiconductor Lasers/Impact of Fiber Nonlinearities on Lightwave Systems/Hybrid Optoelectronic Integration and Packaging/Gigabit Networks
ABSTRACT
2D Materials, 2021
Photodetectors based on nano-structured superconducting thin films are currently some of the most... more Photodetectors based on nano-structured superconducting thin films are currently some of the most sensitive quantum sensors and are key enabling technologies in such broad areas as quantum information, quantum computation and radio-astronomy. However, their broader use is held back by the low operation temperatures which require expensive cryostats. Here, we demonstrate a high-T c superconducting photodetector, which shows orders of magnitude improved performance characteristics of any superconducting detector operated above 77 K, with a responsivity of 9.61 × 104 V W−1, theoretically achievable noise equivalent power of 15.9 fW Hz1/2 and nanosecond relaxation times. At 15 K the detector reaches an ultra-high performance of 2.33 × 107 V W−1 and 55.2 aW Hz1/2. It is based on van der Waals heterostructures of the high temperature superconductor Bi2Sr2CaCu2O8+δ , which are shaped into nano-wires with ultra-small form factor using focused helium ion beam irradiation. To highlight the ve...
2017 19th International Conference on Transparent Optical Networks (ICTON), 2017
COCONUT project demonstrated an innovative DWDM Passive Optical Network implementing the full λ-t... more COCONUT project demonstrated an innovative DWDM Passive Optical Network implementing the full λ-to-the-user concept in a filterless distribution fiber network. We make use of an innovative class of coherent transceivers that exploit the advantages of coherent detection in terms of sensitivity and channel selectivity in a cost efficient manner. The different transceivers developed target different use case scenarios, showing perfect compatibility with legacy infrastructures installed. In this paper, we report the successful trial of the proposed system in a testbed where 4 different coherent transceivers (plus one legacy E-PON system) ran simultaneously, operating over 14 DWDM channels, in a dark-fiber network in the city of Pisa, delivering real-time and/or test traffic. The testbed demonstrated filterless operations, multi-rate transmission (from 1.25 to 10 Gb/s/λ), high ODN loss (18 – 40 dB) as well as a bi-directional channel monitoring system.
Chromatic-dispersion compensation is a powerful tool to upgrade the capacity of optical transmiss... more Chromatic-dispersion compensation is a powerful tool to upgrade the capacity of optical transmission systems.
arXiv: Applied Physics, 2020
Photodetectors based on nano-structured superconducting thin films are currently some of the most... more Photodetectors based on nano-structured superconducting thin films are currently some of the most sensitive quantum sensors and are key enabling technologies in such broad areas as quantum information, quantum computation and radio-astronomy. However, their broader use is held back by the low operation temperatures which require expensive cryostats. Here, we demonstrate a nitrogen cooled superconducting transition edge sensor, which shows orders of magnitude improved performance characteristics of any superconducting detector operated above 77K, with a responsivity of 9.61x10^4 V/W, noise equivalent power of 15.9 fW/Hz-1/2 and operation speeds up to GHz frequencies. It is based on van der Waals heterostructures of the high temperature superconductor Bi2Sr2CaCu2O8, which are shaped into nano-wires with ultra-small form factor. To highlight the versatility of the detector we demonstrate its fabrication and operation on a telecom grade SiN waveguide chip. Our detector significantly rel...
npj Quantum Information
The future envisaged global-scale quantum-communication network will comprise various nodes inter... more The future envisaged global-scale quantum-communication network will comprise various nodes interconnected via optical fibers or free-space channels, depending on the link distance. The free-space segment of such a network should guarantee certain key requirements, such as daytime operation and the compatibility with the complementary telecom-based fiber infrastructure. In addition, space-to-ground links will require the capability of designing light and compact quantum devices to be placed in orbit. For these reasons, investigating available solutions matching all the above requirements is still necessary. Here we present a full prototype for daylight quantum key distribution at 1550 nm exploiting an integrated silicon-photonics chip as state encoder. We tested our prototype in the urban area of Padua (Italy) over a 145 m-long free-space link, obtaining a quantum bit error rate around 0.5% and an averaged secret key rate of 30 kbps during a whole sunny day (from 11:00 to 20:00). Th...
2016 18th International Conference on Transparent Optical Networks (ICTON), 2016
Advantages offered by coherent detection systems in access networks are not limited to the increa... more Advantages offered by coherent detection systems in access networks are not limited to the increase of power budget due to the superior sensitivity. Channel selectivity is another intriguing feature offered by coherent systems that can be exploited to enable advanced system and network functionalities for access systems. Among them, we focus here on the implementation of filterless optical networks and network reconfiguration capabilities which might be required to satisfy dynamic load balancing requests and new terminal activations. We show that in the access domain these functionalities do not require DSP-aided coherent receivers, but can be easily realized by means of simpler, fully analogue real-time coherent terminals matching the access network low-cost paradigm. This paper discusses these concepts and how they can be experimentally implemented by using a novel wavelength allocation algorithm and real-time analogue coherent transceivers based on DFB lasers, whose wavelengths are tuned by a simple temperature control.
IEEE Photonics Journal, 2015
We demonstrate 10-Gb/s transmission over more than 130 km of G.652 fiber using a simple directly ... more We demonstrate 10-Gb/s transmission over more than 130 km of G.652 fiber using a simple directly modulated distributed feedback (DFB) laser and a new “chirp-managed” approach based on a low-complexity coherent receiver. The “chirp-managed” effect, which has been obtained in the past by optical spectral reshaping, is conveniently achieved here by means of simple electrical filtering of the received signal at the intermediate frequency. Due to coherent detection, the receiver sensitivity was -38 dBm at bit error rate (BER) 1/4 1.8 χ 10-3. No colored filters and no dispersion compensation (optical or digital signal processing (DSP)-based) were used at the receiver side. We show that the coherent system presented here, based on off-the-shelf components, is robust against variations of DFB chirp, local oscillator detuning, and electrical filter bandwidth over ranges wide enough to guarantee a simple and cost-effective implementation for 10-Gb/s long-reach passive optical network applications.
2015 International Conference on Photonics in Switching (PS), 2015
This paper presents the most significant results achieved in the last two years by our group in c... more This paper presents the most significant results achieved in the last two years by our group in coherent ultradense-WDM PON for λ λ-to-the-user access. Here we mostly focus on the architectures based on simple OOK-NRZ modulation format. We demonstrated the real-time implementation of our coherent receiver and we proved its compatibility with direct modulated laser (DML). Receiver sensitivities as low as-48 dBm at BER=1•10-3 for 1.25 Gb/s has been observed, showing the feasibility of a coherent ONU receiver based on devices commonly available and with limited cost. The system support quite high ODN losses and allows the λ-to-the-user approach.
2015 17th International Conference on Transparent Optical Networks (ICTON), 2015
This paper presents the implementations and test results of the novel polarization-independent re... more This paper presents the implementations and test results of the novel polarization-independent receiver for ASK format, realized in the framework of COCONUT FP7 Project. COCONUT exploits low-cost optical components and simple electronics, so that the cost of typical line terminals would be affordable to the end-users. Among the different technical approaches considered within the project; we focus here on the solutions based on simple OOK-NRZ format. We developed an original improvement of the conventional phase-diversity coherent detection schemes, providing for polarization independent operations without doubling the receiver structure. As a result we demonstrated that polarization-independent coherent detection is feasible within the constraint of limited cost typical of passive access networks. The developed receivers can allow for high-power budget (> 45 dB and ultra-dense WDM operation (6.25 GHz grid).
Optics Express, 2015
We demonstrate experimentally a novel type of coherent low cost Gigabit-to-the-User Ultra-Dense-W... more We demonstrate experimentally a novel type of coherent low cost Gigabit-to-the-User Ultra-Dense-Wavelength Division Multiplexing (UD-WDM) PON, featuring 6.25 GHz channel spacing and long reach. Polarization-independent coherent detection is achieved by exploiting a novel scheme which requires only a 3 × 3 coupler, three photodiodes, basic analogue processing and a common DFB as local oscillator (LO). This avoids the conventional polarization diversity approach. The DFB LO is free running, i.e. not locked in frequency, and is tuned to detect any of the eight channels by simply changing its temperature in a range of 2°C. We achieve 70 km long-reach transmission plus 30 dB attenuation, for a total of > 45 dB optical distribution network loss. This indicates that this solution could be effectively exploited to overlay existing PON infrastructures by UD-WDM.
2015 17th International Conference on Transparent Optical Networks (ICTON), 2015
Processing of high-frequency, wide-band signals is conveniently performed in the optical domain d... more Processing of high-frequency, wide-band signals is conveniently performed in the optical domain due to availability of optical filters which intrinsically have a wide-band response. On the other end, there are several application scenarios where very sharp pass-band filtering is required. In these cases, realizing the processing in the optical domain might not be technically simple, although filters of extremely high Q-factor have been demonstrated. This paper presents the feasibility of signal processing based on very sharp electrical filtering (<; 1 GHz around 193 THz) assisted by optical down-conversion, i.e., by means of optical coherent detection. In particular, we show experimentally two applications where the filtering capability is exploited to perform signal processing: the demodulation of phase-modulated optical signals and the implementation of a chirp-managed transmission link. Other possible applications of this technique will be also discussed at the presentation.
Fiber Optic Networks and Coherent Technology in Fiber Optic Systems II, 1987
The determination of the sensitivity of a single-mode optical fibre to microbending and macrobend... more The determination of the sensitivity of a single-mode optical fibre to microbending and macrobending is of great importance. Two kinds of spot-size rule such a sensitivity: wn, the r.m.s. width of the near-field, and Woo the inverse of the transverse propagation constant in the cladding. While measurement techniques for wn are already known, this paper proposes an original method for woo measurements and concentrates on more plausible algorithms for macrobending and microbending loss determination from those measurements.
Optical and Quantum Electronics, 1994
The development of optical fibre amplifiers has caused an impressive evolution in optical telecom... more The development of optical fibre amplifiers has caused an impressive evolution in optical telecommunications systems since the end of the 1980s. The widespread application of active fibre amplifiers requires accurate tools to design and simulate these devices in very different operating conditions. The present work describes some physical aspects of active fibre amplifiers and a numerical model for the analysis of active optical fibres that can be applied to investigate spatial and spectral properties of amplifiers for the transmission windows of optical fibre telecommunications. Finally, various design issues relevant to the investigation of optimal fibre design of silica, fluoride erbium-doped and fluoride praseodymium-doped fibres are discussed and illustrated by means of examples.
Optical Amplifiers and Their Applications, 1992
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Papers by Massimo Artiglia