We demonstrate error-free wavelength conversion at 320 Gb/s by employing a semiconductor optical amplifier that fully recovers in 56 ps. Error-free operation is achieved without using forward error correction technology. employ filtering to select the blue sideband of spectrum probe light, utilize fast chirp dynamics introduced amplifier, and overcome slow gain recovery. This leads an effective recovery time less than 1.8 ps for converter. The converter has simple configuration implemented...

Error-free and pattern-independent wavelength conversion at 160 Gb/s is demonstrated. The converter utilizes a semiconductor optical amplifier (SOA) with recovery time greater than 90 ps an bandpass filter (OBF) placed the output. This paper shows that OBF central blue shifted compared to of converted signal shortens 3 ps. constructed by using commercially available fiber-pigtailed components. It has simple configuration allows photonic integration.

The free-space narrow infrared beams can offer unprecedented data capacity to devices individually, as they provide non-shared connections that have a large link power budget. By means of fully passive module based on high port count arrayed waveguide grating router (AWGR), many be 2D steered individually using wavelength tuning. applying the defocusing techniques, compact beam steering has been realized. A simultaneous communication at up 112 Gbit/s PAM-4 per shown with an 80-ports AWGR,...

We discuss an all-optical wavelength converter based on nonlinear polarization rotation in a single semiconductor optical amplifier. show that inverted and noninverted conversion can be realized. also demonstrate this wavelength-conversion concept operate over large range. Experiments error-free obtained at bit rate of 10 Gb/s.

Free-space indoor optical communication deploying pencil beams can offer ultra-high wireless capacity individually per user device. By means of two-dimensional (2D) diffractive modules, such as a pair crossed gratings, 2D steering multiple by just tuning the wavelength each beam be achieved. The design aspects an system fed via intelligent fiber backbone network are discussed. angular over 6° × 12° area was achieved from 1505 to 1630 nm. System experiments using PAM-4 modulation have shown...

Indoor networks have to carry a large variety of services, with widely differing needs regarding, e.g., bandwidth, quality service, and reliability. They support both wirebound wireless connectivity, at low costs energy consumption levels. This paper gives an overview trends recent research results in the area photonic solutions for indoor networks. It reviews architectures, economics, techniques converged optical fiber networks, which are cost- energy-efficient, compares them current...

In order to circumvent radio spectrum congestion, we propose an innovative system which can provide multiple infrared optical wireless beams simultaneously where each beam supports multi-gigabit-per-second communication. Scalable two-dimensional steering by means of wavelength tuning is proposed. A passive beam-steering module constructed with cascaded reflection gratings designed for simultaneous multi-user coverage. We experimentally characterized the beam-steered and thoroughly evaluated...

The optical spectrum offers great opportunities to resolve the congestion in radio-based communication, aggravated by booming demand for wireless connectivity. High-speed infrared components 1500 nm window have reached high levels of sophistication and are extensively used already fibre-optic networks. Moreover, light beyond 1400 is eye-safe not noticeable users. Deploying steerable narrow beams, links with huge capacity can be established users individually, at minimum power consumption...

We present a high-capacity ultrafast all-optical time demultiplexer that can be employed to retrieve 40 gigabits/second (Gb/s) base-rate channels from 640 Gb/s single-polarized signal. The utilizes effects of filtered chirp semiconductor optical amplifier. Excellent demultiplexing performance is shown at very low switching powers: +8 dBm (640 data) and -14 (40 GHz clock). has simple structure and, in principle, allows monolithic integration.

We experimentally demonstrate a bit-rate of 47.4 Gb/s over 100 m perfluorinated multimode graded-index plastic optical fiber (GI-POF) by exploiting discrete multitone (DMT) modulation with rate-adaptive bit-loading. The maximum achieved aggregate bit rate is 51.8 including DMT transmission overhead (cyclic prefix and preambles) the standard 7% forward-error-correction (FEC) overhead. This an intensity-modulated direct-detection (IM-DD) link using directly-modulated DFB laser (1300-nm)...

Recent activity to achieve multi-gigabit transmission over 1 mm core diameter graded-index and step-index plastic optical fibers for distances up 50 meters is reported in this paper. By employing a simple intensity-modulated direct-detection system with pulse amplitude or digital multi-tone modulation techniques, low-cost transceivers easy install large-core POFs, it demonstrated that 10 Gbit/s 1-mm POF infrastructure feasible. The results presented paper were obtained the EU FP7 POF-PLUS...

An optically tunable frequency-doubling optoelectronic oscillator (FD-OEO) based on stimulated Brillouin scattering (SBS) and carrier phase-shifted double sideband (CPS-DSB) modulation is proposed demonstrated. SBS effect provides narrowband filtering for the OEO to generate an oscillation signal with frequency equal shift, while a CPS-DSB by using dual-parallel Mach-Zehnder modulator implemented frequency. Owing wavelength-dependent tunability realized tuning wavelength of laser source. In...

We report a novel optical wireless communication (OWC) system solution that supports multi-Gbps (Gigabit-per-second) capacity for indoors. Narrow beams, termed as pencil are directed to users using tunable laser and passive diffractive element. This enables wide coverage of ultra-high-capacity links serve multiple network simultaneously. Experimental results demonstrating data rates up 10 Gbps, with on-off keying modulation format, over distance more than 2.5 m, reported. Error-free...

In this paper we present the design, realization, and experimental characterization of a photonic integrated true time delay circuit on CMOS-compatible Si <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> N xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> platform. The consists an optical side band filter for single modulation ring resonator broadband delay. Two methods tuning are investigated: 1) wavelength 2) thermo-optic tuning....

By means of narrow infrared beams very high capacity wireless links can be set up to users individually, while also offering privacy and energy efficiency. Accurate device localization for steering the is required. This has been achieved within 10 cm pico-cell resolution a 2D beam-steered optical communication system by applying matrix miniature corner-cube retro-reflectors. The process self-calibrating, does not need power-consuming elements at receiver. In an indoor laboratory setup,...

We investigate all-optical switching in a multi-quantum-well semiconductor optical amplifier-based nonlinear polarization switch using pulses with duration of 200 fs at central wavelength 1520 nm. show full recovery the within 600 fs, both gain and absorption regime. discuss mechanisms numerical simulations that are qualitatively good agreement our experimental data.

We demonstrate error-free 320 Gb/s SOA-based optical wavelength conversion. By utilizing filtering, an effective recovery time of less than 1.8 ps is achieved in SOA, which ensures operation.

A novel parallel optical delay detector is proposed for angle-of-arrival (AOA) measurement of a microwave signal with accuracy monitoring. theoretical model built up to analyze the system, including The measurements AOA are then experimentally investigated monitored accuracy.

A photonic beamformer system designed for next-generation 5G new radio (5G NR) operating in the millimeter waveband is proposed and demonstrated experimentally, including its performance characterization. The beamforming device based on optical ring resonators (ORRs) implemented Si <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> N xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> assisted with multicore fiber (MCF) to feed different...

A wide-scan and broadband focal-plane array (FPA) concept is introduced in this article, which provides high antenna gain effective isotropic radiated power (EIRP) with electronic beamsteering within a relatively large field of view (FoV), up to +/-20°. The uses bifocal double-reflector that optimizes the illumination region. In way, we have reduced required size feed maximized number simultaneously active elements. By using photonics beamformer, system for 20-40-GHz band can be created...

By means of narrow 2D-steerable infrared beams, interference-free individual wireless connections to densely-spaced devices in industry 4.0 settings can be made. Beam steering by fiber-fed passive diffractive beam modules and wavelength-tunable transceivers located a separate controller location enable readily scalable connectivity many their nomadic mobility. To accommodate the dynamics settings, self-calibrating localization retro-reflecting corner cube foils scanning is demonstrated,...

In order to meet the massively increasing requirements of big-data applications, data centers (DCs) are key infrastructures cope with associated demands, such as high performance, easy scalability, low cabling complexity and power consumption. Many research efforts have been dedicated traditional wired center networks (DCNs). However, DCNs’ static rigid topology based on optical cables significantly limits their flexibility, even reconfigurability. The limitations this connection can be...

We present a novel indoor communication network using 1-mm core diameter step-index plastic optical fibres as feeder line, and the light emitted by POF-end for wireless data transmission, creating fully passive access point (AP). This has advantage of not requiring electrical powering, resulting in low maintenance. Due to large numerical aperture, POF is extremely divergent, thus lens must be placed front adjust size coverage area enable users movement or increase number served link....

Radio-over-fiber technologies enable efficient provisioning of broadband wireless services both in access and in-building networks, particular when combined with flexible optical routing dispersion-robust RoF transport techniques, such as frequency multiplying.

Large-core polymethylmethacrylate (PMMA) plastic optical fiber has been recognized as a strong candidate for future in-home networks. Both economic and technical studies have shown that it can provide cost-effective solution to address the booming capacity demand. Evolving from laboratory trial systems with emerging maturing POF components, Gigabit solutions are getting ready be commercialized. This article overviews state of art activities in both research industrial aspects, reports latest...