Phys.org July 25, 2023 The modulation characteristics of perovskite LEDs are not clear. An international team of researchers (UK, Switzerland) has developed a new approach for realizing fast perovskite photonic sources on silicon based on tailoring alkylammonium cations in perovskite systems. They showed the recombination behaviour of charged species at various carrier density regimes relevant for their modulation performance. By integrating a Fabry–Pérot microcavity on silicon, they demonstrated perovskite devices with efficient light outcoupling and achieved device modulation bandwidths of up to 42.6 MHz and data rates above 50 Mbps, with further analysis suggesting that the bandwidth may exceed gigahertz levels. According […]
Tag Archives: Data transmission
Researchers Just Set a New Record For Data Transmission Speed
Science Alert June 4, 2022 Researchers in Japan achieved new data transmission speed record using an optical fiber network similar to those currently used for internet infrastructure. In their experiment they used 0.125 mm diameter multi-core fiber (MCF), with WDM, total of 801 parallel wavelength channels were packed into the same line. They used four cores instead of the standard one, essentially quadrupling the routes for data to take, all while keeping the cable the same size as a standard optical fiber line. They applied various other optimization, signal boosting, and decoding technologies. The team plans to continue to improve […]
Nuclear radiation used to transmit digital data wireless
Phys.org November 10, 2021 An international team of researchers (UK, Slovenia) reports on the configuration and operation of a nuclear instrumentation set-up designed to transmit digitally encoded information using fast neutrons. They measured the spontaneous emission of fast neutrons from californium-252, a radioactive isotope produced in nuclear reactors. Modulated emissions were measured using a detector and recorded. A word, the alphabet and a random number selected blindly, were encoded serially into the modulation of the neutron field and the output decoded on a laptop which recovered the encoded information on screen. A double-blind test was performed in which a number […]
Ultrafast optical switching can save overwhelmed datacenters
Phys.org October 15, 2021 Optical circuit switches can offer high bandwidth, low network latency and an energy-efficient and scalable data center network. However, it is critical to switch between wavelengths at nanosecond (ns) timescales. An international team of researchers (Switzerland, UK) has demonstrated ultrafast optical circuit switches based on a microcomb and semiconductor optical amplifiers (SOAs). They used a photonic integrated Si3N4 microcomb to achieve sub-ns switching along with the 25-Gbps non-return-to-zero and 50-Gbps four-level pulse amplitude modulation burst mode data transmission. And they used a photonic integrated circuit comprising an Indium phosphide-based SOA array and an arrayed waveguide grating […]
Using graphene, researchers increase optical data transmission speed by a factor of at least 10,000.
Nanowerk January 19, 2021 Conventional optical-fiber-based pulsed lasers have limits to increasing the number of pulses per second above the MHz level. Researchers in South Korea inserted an additional resonator containing graphene into a fiber-optic pulsed-laser oscillator that operates in the domain of femtoseconds (10-15 seconds). This increased data transmission and processing speeds significantly. They synthesized graphene, which has the characteristics of absorbing and eliminating weak light and amplifying the intensity by passing only strong light into the resonator. This allows the laser intensity change to be accurately controlled at a high rate, and thus the repetition rate of pulses […]
World’s First Successful Transmission of 1 Petabit per Second Using a Single-core Multimode Optical Fiber
NICT Japan December 18, 2020 Researchers in Japan have demonstrated the possibility of combining highly spectral efficient wideband optical transmission with an optical fiber guiding 15 fiber modes that had a cladding diameter in agreement with the current industry standard of 0.125 mm. This was enabled by mode multiplexers and an optical fiber that supported wideband transmission of more than 80 nm over 23 km. The study highlights the large potential of single-core multi-mode fibers for high-capacity transmission using fiber manufacturing processes like those used in the production of standard multi-mode fibers. The results of this study were accepted for […]
New fiber optic sensors transmit data up to 100 times faster
EurekAlert November 16, 2020 Distributed optical fibre sensors deliver a map of a physical quantity along an optical fibre, providing a unique solution for health monitoring of targeted structures. An international team of researchers (China, Switzerland, Chile) propose a technique encoding the interrogating light signal by a single-sequence aperiodic code and spatially resolving the fibre information through a fast-post-processing. The code sequence is once forever computed by a specifically developed genetic algorithm, enabling a performance enhancement using an unmodified conventional configuration for the sensor. They demonstrated in Brillouin and Raman based sensors, both outperforming the state-of-the-art sensors. The new technique […]
A completely new plasmonic chip for ultrafast data transmission using light
Techxplore.com July 3, 2020 To address the challenge of increasing data rates an international team of researchers (Switzerland, Germany, USA- University of Washington, Israel, Greece) has developed a monolithically integrated electro-optical transmitter that can achieve symbol rates beyond 100 GBd. They combined advanced bipolar CMOS with silicon plasmonics, and addressed key challenges in monolithic integration through co-design of the electronic and plasmonic layers, including thermal design, packaging, and a nonlinear organic electro-optic material. They demonstrated their technique by developing two modulator concepts—an ultra-compact plasmonic modulator and a silicon-plasmonic modulator with photonic routing—both directly processed onto the bipolar CMOS electronics. The findings […]
Extreme high-frequency signals enable terabits-per-second data links
Phys.com March 31, 2020 A team of researchers in the US (Brown University, industry) tested sending extremely high-frequency 200 GHz signals through a device with two wires running parallel inside a sheath with a large diameter that facilitates increased mixing of the waveguide modes. These mixtures enable the transmission of parallel noninterfering data channels. They demonstrated that the waveguide could support a data rate of 10 terabits per second. Their work demonstrates the feasibility of this approach to high-rate data transmission…read more.
World record transmission of 172 Tb/s over 2040km distance coupled-3-core multi-core fiber
EurekAlert April 2, 2020 Using the product of data-rate and distance as a general index of transmission capacity, researchers in Japan achieved 351 petabit/s x km, more than doubling the current world record in standard outer diameter optical fibers employing space-division multiplexing. The coupled-core multi-core fiber requires signal processing on the receiving side after transmission, but the signal processing load is less compared to more commonly investigated few-mode fibers. The fiber has the same outer diameter as standard optical fibers which allows converting such a fiber into a cable with existing technologies and equipment, simplifying a timely adoption of coupled-core […]