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11th International conference on Information Optics and photonics (CIOP)

作者： Gui, Lin Zhu, Yu-xuan Song, Su-zhen Guo, Yun-ci Shanghai Polytech Univ Coll Comp & Informat Engn Shanghai 201209 Peoples R China Shanghai Polytech Univ Sch Environm & Mat Engn Shanghai 201209 Peoples R China

ISBN: (数字)9781510631748

ISBN: (纸本)9781510631748

Microwave photonic filter is one of the key technologies of microwave photonics. Its main purpose is to replace the traditional method to process radio frequency signal, modulate optical carrier by radio frequency signal, and process it directly in the optical domain. The advantage of FIR microwave photonic filter is that it has no system poles and is more stable. It guarantees linear phase, which is very important in signal processing. In this paper, the incoherent microwave photon sensor cascaded by FBG is verified experimentally. In the experiment, three FBG wavelengths are 1530 nm, 1550.12nm and 1539.5nm respectively to form a high-order FIR microwave photon filter, two 3dB couplers and three km fibers to form an unbalanced M-Z interferometer. The incoherent light generated by EDFA is modulated by a filter electro-optic modulator through an optical fiber Bragg grating, demodulated by an M-Z interferometer, and eventually received by a photodetector. In the experiment, 60 MHz near notch is chosen as the modulation frequency, the amplitude of modulation signal is 4 v-pp, the temperature range is 30-40 degrees C with the temperature interval of 1 degrees C. The sensitivities of 0.2219dBm/degrees C are obtained by processing the average values of 3 points, 5 points, 7 points, 10 points and 15 points.

关键词： Microwave photonics Fiber Bragg grating Microwave photonic filter Mach-Zehnder interferometer

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Foreword to the Special Issue on the 44th European conference on Optical Communication (ECOC 2018)

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JOURNAL OF LIGHTWAvE TECHNOLOGY 2019年第5期37卷 1450-1455页

作者： Bogoni, Antonella Mecozzi, Antonio Okonkwo, Chigo M. Plant, David v. Saitoh, Kunimasa Wosinska, Lena Liu, Gordon Ning Umbach, Andreas Charlet, Gabriel Gaudino, Roberto Scuola Super Sant Anna I-56127 Pisa Italy Univ Aquila Dept Phys & Chem Sci I-67100 Laquila Italy Eindhoven Univ Technol NL-5612 AZ Eindhoven Netherlands McGill Univ Dept Elect & Comp Engn Montreal PQ Canada Hokkaido Univ Elect Engn Sapporo Hokkaido 0600814 Japan Hokkaido Univ Grad Sch Engn Sapporo Hokkaido 0600814 Japan Hokkaido Univ Grad Sch Informat Sci & Technol Sapporo Hokkaido 0600814 Japan KTH Royal Inst Technol Photon S-11428 Stockholm Sweden KTH Royal Inst Technol Opt Networks S-11428 Stockholm Sweden Huawei Technol Co Ltd Shenzhen 518129 Peoples R China AUCCEPT Consulting GmbH D-14055 Berlin Germany Huawei Paris Res Ctr F-75002 Paris France Politecn Torino Dipartimento Elettron & Telecomunicaz I-10129 Turin Italy

No abstract available.

关键词： All optical signal processing Analog optical signal processing Nonlinear optical signal processing Optical communications Optical networks Space division multiplexing

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Joint Topological and Polarization Entanglement Enables Noise-Resistant Optical Information processing

Joint Topological and Polarization Entanglement Enables Nois...

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conference on Lasers and Electro-Optics Europe / European Quantum Electronics conference (CLEO/Europe-EQEC)

作者： Sergienko, Alexander, v Simon, David S. Osawa, Shuto Dept Elect & Comp Engn 8 St Marys St Boston MA 02215 USA Stonehill Coll Dept Phys & Astron 320 Washington St Easton MA 02357 USA Boston Univ Dept Phys 590 Commonwealth Ave Boston MA 02215 USA

ISBN: (纸本)9781728104690

Directionally-unbiased multiports and topological states. The goal is to entangle states associated with distinct topological sectors, and to do so in a way that allows this entangled topology to be readily available for information processing and detection. Specifically, linear optics will be used to produce: (i) winding-number-entangled bulk states, and (ii) an entangled pair of error-protected memory registers. To create the states, a source of initial polarization-entangled light is necessary, specifically type-II spontaneous parametric down conversion (SPDC) in a nonlinear crystal. All further processing requires only linear optical elements. Topological invariants characterize global properties of systems and cannot be easily distinguished by localized measurements. This difficulty in measurement traditionally limits their use in many applications. That problem is solved here by linking topology to a more easily-measured variable, polarization. Polarization and winding number will be tightly correlated (and in fact, jointly entangled with each other), but will serve distinct purposes: winding number provides stability against perturbations, while polarization allows easy access and measurement.

关键词： Windings Diamond Adaptive optics Nonlinear optics Optical polarization Optical scattering photonics

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Modeling the electron-photon interaction in monolayers of graphene and transition metal dichalcogenides in a tight binding approximation 5

Modeling the electron-photon interaction in monolayers of gr...

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5th International conference on Information Technology and Nanotechnology, ITNT 2019

作者： Hussein, S.M.R.H. Kharitonov, S.I. Kazanskiy, N.L. Pavelyev, v.S. Kozlova, I.N. Image Processing Systems Institute of RAS-Branch of the FSRC Crystallography and Photonics RAS Molodogvardejskaya street 151 Samara443001 Russia University of Karbala Karbala56001 Iraq Samara National Research University Moskovskoe Shosse 34A Samara443086 Russia

In the presence of a strong electromagnetic field, the spectrum of charge carriers in a Dirac material is changed. The interaction of a linearly polarized field with electrons in the Dirac material leads to anisotropy. The anisotropy axis coincides with the direction of the electric field in the linearly polarized wave. We show that the major contribution to the interaction of electrons with an electromagnetic field comes from elastic scattering processes, whereas taking into account inelastic processes leads to an error of about 2%. © 2019 Published under licence by IOP Publishing Ltd.

关键词： Electromagnetic fields

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Investigation of directional and directionally-unbiased devices in linear optics for quantum walk applications 17

Investigation of directional and directionally-unbiased devi...

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conference on Quantum Communications and Quantum Imaging XvII

作者： Osawa, Shuto Simon, David S. Sergienko, Alexander v. Boston Univ Dept Elect & Comp Engn 8 St Marys St Boston MA 02215 USA Stonehill Coll Dept Phys & Astron 320 Washington St Easton MA 02357 USA Boston Univ Dept Phys 590 Commonwealth Ave Boston MA 02215 USA Boston Univ Photon Ctr 8 St Marys St Boston MA 02215 USA

ISBN: (数字)9781510629622

ISBN: (纸本)9781510629622

The optical beam splitter is one of the main building blocks in photonics-based quantum information processing. Traditionally, beam splitters are used in feed-forward configurations that reflect their natural directional-bias, meaning a photon cannot leave the scattering element through the entrance port. However, this directional-bias constraint can be circumvented by designing new linear-optical configurations that include mirrors in addition to the beam splitter. This directionality removal restores a full symmetry in the scattering element and allows the input photon to leave the system also from the input port. Such a system can be seen as a scattering center, enabling execution of quantum walks on rather complex optical graph networks with great savings in hardware resources when compared with existing approaches utilizing directionally-biased devices. The directionally-unbiased configuration can be realized using different optical systems. Analysis of some originally directional optical devices and the basic principles of their conversion into directionally-unbiased systems form the base of this paper. Several quantum walk procedures executed on graph networks constructed using directionally-unbiased nodes are discussed.

关键词： Linear optics Quantum information processing

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Dielectric Rod Antenna Array for photonic-Based Sub-Terahertz Beamforming 44

Dielectric Rod Antenna Array for Photonic-Based Sub-Terahert...

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44th International conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)

作者： Smirnov, Serguei Morales, Alvaro Okonkwo, Chigo Monroy, Idelfonso Tafur Lioubtchenko, Dmitri, v Oberhammer, Joachim KTH Royal Inst Technol Dept Micro & Nanosyst Stockholm Sweden Eindhoven Univ Technol Inst Photon Integrat Eindhoven Netherlands Inst High Pressure Phys Ctr Terahertz Res & Applicat Warsaw Poland

ISBN: (纸本)9781538682852

This work presents a dielectric rod antenna array designed for a photonic-enabled heamforming system at sub-terahertz frequencies. The photonic chip generates an optical group delay, providing the beam-steering capability. The antenna array is fabricated from high-resistivity silicon by micro-machining. Simulation results demonstrate a directivity of 14.7 dBi and a beam steering range of 56 degrees at 85 GHz. The system is intended as a sub-THz transmitter for broadband wireless communications.

关键词： Antenna arrays photonics Optical transmitters Europe Array signal processing Silicon

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Temperature-dependent minority carrier lifetime in InAsSb nBn detectors on alternative substrates 9

Temperature-dependent minority carrier lifetime in InAsSb nB...

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conference on Infrared Sensors, Devices, and Applications IX as part of SPIE Optics + photonics conference

作者： Taghipour, Z. Dahiya, v. Grassman, T. Fastenau, J. M. Liu, A. W. K. Lubyshev, D. Kishna, S. Ohio State Univ Dept Elect Engn Columbus OH 43210 USA IQE Inc 119 Technol Dr Bethlehem PA 18015 USA

ISBN: (数字)9781510629523

ISBN: (纸本)9781510629523

The 6.1 angstrom family of Sb-based III-v materials and heterostructures is a promising candidate for infrared (IR) detector applications. For the realization of low-cost, large-format IR photodetector arrays these materials must be grown on larger diameter substrates. For this purpose, GaAs substrates, with appropriate metamorphic buffer structures, have shown to be a promising alternative. Moreover, other platforms, such as Ge-on-Si (Ge/Si) and Ge-on-insulator-on-Si (GeOI/Si) virtual substrates, enable direct integration of the III-v devices with Si microelectronics read-out and processing architectures. In this paper, we investigate the structural and optoelectronic quality of mid-wavelength infrared InAsSb nBn photodetectors with a room temperature 50% cut-off wavelength of 4.5 mu m grown on multiple substrates, including GaSb, GaAs, and Ge/Si. Material quality was examined using non-contact, non-destructive electron channeling contrast imaging (ECCI) in a scanning electron microscope for high-accuracy threading dislocation density (TDD) measurement and time-resolved microwave reflectance (TMR) spectroscopy for minority carrier lifetime (tau(mc)) measurement. The combination of these two techniques enables a direct correlation between TDD and tau(mc). Our preliminary data indicate that higher TDD results in a reduced lifetime, similar to observations in III-v materials and HgCdTe IR materials. Here we present our analysis of equivalent nBn structures grown on GaSb, GaAs, and Ge/Si. The results of tau(mc) indicate that the sample on GaSb and GaAs have the longest and the shortest lifetime, respectively, for temperatures above 70 K. Combining lifetime characterization with the TDD analysis from ECCI enables the assessment of metamorphic detectors on alternate substrates as a platform for large-format focal plane arrays.

关键词： unipolar barrier infrared detectors minority carrier lifetime mid-wave infrared

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Record-sensitivity receiver at 1 photon/bit for free-space applications

Record-sensitivity receiver at 1 photon/bit for free-space a...

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Asia Communications and photonics conference

作者： Jochen Schrder Ravikiran Kakarla Peter A. Andrekson Fiber Optic Communication Research Center (FORCE) Department of Microtechnology and Nanoscience MC2 Chalmers University of Technology Gothenburg Sweden

We demonstrate 1 photon-per-bit receiver sensitivity at 10.52 Gb/s enabled by a low-noise phase-sensitive pre-amplifier in combination with injection-locking-based pump recovery operating at sub nano-Watt powers.

ISBN: (纸本)9781943580705

关键词： Coherent receivers Fiber optic communications Free space optics Heterodyne receivers Optical receivers Signal processing

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Simulation of CubeSat caliber particle detector "MiRA_ep" response to energetic electrons and protons using GEANT4 package

Simulation of CubeSat caliber particle detector "MiRA_ep" re...

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44th WILGA Symposium on photonics Applications and Web Engineering

作者： Barylak, Jaromir Dudnik, Oleksiy v. Wozniczak, Tomasz Adamenko, volodymyr O. Antypenko, Ruslan v. Yezerskyi, Nikita v. Kowalinski, Miroslaw Lazarev, Igor v. Zielinska, Agata Sylwester, Janusz Bakala, Jaroslaw Podgorski, Piotr Polish Acad Sci Space Res Ctr Solar Phys Div Kopernika Str 11 PL-51622 Wroclaw Poland Natl Acad Sci Ukraine Inst Radio Astron Mystetstv Str 4 UA-61002 Kharkiv Ukraine Natl Tech Univ Ukraine Igor Sikorsky Kyiv Polytech Inst Peremohy Ave 37 UA-03056 Kiev Ukraine Natl Acad Sci Ukraine Inst Scintillat Mat Nauki Ave 60 UA-61072 Kharkiv Ukraine

ISBN: (纸本)9781510630666

In recent years, interest in revealing, registering, analyzing and interpretation of the short-term (0.1-1 s) sharp increases in the number of high-energy charged particles at LEO (Low Earth Orbit) has substantially increased. This is due to the profound influence of geomagnetic disturbances on the state of the van Allen radiation belts, one of the important components of space weather. At the same time, in recent years, principally new technologies have been rapidly developed, both in the area of detection of the elementary charged particles and in construction of space microelectronics. In particular, over the past years, nanosatellites in the CubeSat standard were developed, manufactured and launched into LEO, whose mission was to record and study the characteristics of electron microbursts precipitating from the Earth radiation belts. Here, we present the concept of a compact instrument developed in the 1U CubeSat standard which is aimed to study the nature of high-energy charged particles microbursts present in the Earth magnetosphere. A functional diagram, a description of the structural modules and the technical characteristics of the miniaturized electron-proton recorder-analyzer MiRA_ep are shown. We have carried out and present the results of computer simulation of the physical processes caused by high-energy electron and proton passage through sensors of the detector head of the MiRA_ep device. The simulation was carried out with the Monte Carlo method using the CERN GEANT4 package. The values of most probable deposited energies were calculated for a wide range of primary electrons and proton energies. This allowed us to make a conclusion about the effective energy ranges of the proposed instrument. The results of these simulations will be used in developing analog and digital signal processing electronic units.

关键词： van Allen radiation belts electrons protons CubeSat standard computer simulation GEANT4 functional scheme energy range

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Fiber Distribution Networks with Direct and External Modulation of Digital QAM-Signals 42

Fiber Distribution Networks with Direct and External Modulat...

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42nd International conference on Telecommunications and Signal processing (TSP)

作者： Bakhvalova, T. N. Fofanov, D. A. Alyoshin, A. v. Belkin, M. E. MIREA Russian Technol Univ Sci & Technol Ctr Integrated Microwave Photon Moscow Russia

ISBN: (纸本)9781728118642

This We compare in detail the both available methods of intensity modulation in C-band: a direct one controlling injection current of distributed feedback laser or vertical cavity surface emitting laser, also an external one using electroabsorption modulator or lithium-niobate Mach-Zehnder modulator. In all cases, the same 64-position quadrature modulated signal at the radio-frequency carrier propagates over fiber fronthaul link of an analog Radio-over-Fiber system. Two limiting factors were taken into account: parasitic frequency chirp and fiber dispersion. In the result, the fiber distance of the link under study reaches within standard limit of 8% up to 33 km for a vertical cavity surface emitting laser, up to 55 km for a distributed feedback laser, up to 58 km for an electroabsorption modulator, and up to 62 km for a Mach-Zehnder modulator that are comparable with known data for individual devices under test. During the study of link at the carrier frequencies up to 10 GHz an intriguing effect was found for the case of a vertical cavity surface emitting laser, which consists in a drop in the slope of the error values with their increasing that is most likely explained by the presence of inverse frequency dependence of the adiabatic chirp factor's magnitude and phase.

关键词： analog radio-over-fiber network computer-aided design fiber fronthaul link microwave photonics QAM-signals

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