Current Oscillator News and Events

Current Oscillator News and Events, Oscillator News Articles.
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MHz, multi-beams coherent XUV source by intracavity high-order harmonic generation
We demonstrate a novel method of realizing a MHz repetition-rate coherent extreme ultraviolet (XUV) light source by utilizing intracavity high-order harmonic generation (HHG) in a mode-locked oscillator. We have successfully implemented HHG by introducing two different rare gases into two separate foci and picking up each HH beam. This XUV light source will open a new route to perform a time-resolved measurement with an XUV-pump and XUV-probe scheme at a MHz repetition, femtosecond resolution. (2020-10-12)

Microcomb-injected pulsed lasers as variable microwave gears
Optical frequency combs can link frequencies in the microwave domain to high-purity laser emissions, yielding unprecedented precision in time-keeping and metrology. Now EPFL scientists and their colleagues have generated variable low-noise microwave signals by building variable microwave gears with two compact optical frequency combs. (2020-09-29)

Ultrafast hydrogen bond dynamics of liquid water revealed by THz-induced Kerr effect
Hydrogen bond dynamics in water has always been mysterious, and it is the basis for understanding the behavior of matter in the water environment. Chinese scientists found that applying a broadband terahertz pulse to a free-flowing water film will enhance the relatively weak intermolecular hydrogen bond motion, allowing us to observe ultrafast vibration characteristics on the order of sub-picoseconds. This method can be used to study the complex interaction of reagents with solvent water molecules. (2020-08-18)

Energy-efficient tuning of spintronic neurons
The human brain efficiently executes highly sophisticated tasks, such as image and speech recognition, with an exceptionally lower energy budget than today's computers can. The development of energy-efficient and tunable artificial neurons capable of emulating brain-inspired processes has, therefore, been a major research goal for decades. (2020-08-17)

Scientists find how clock gene wakes up green algae
Researchers at Nagoya University have found the mechanism of the night-to-day transition of the circadian rhythm in green algae. The findings could be applied to green algae to produce larger amounts of lipids, which are a possible sustainable source of biofuel. (2020-08-05)

Optoelectronic parametric oscillator
Parametric oscillators such as optical parametric oscillators (OPOs) are widely used in various areas of physics. Scientist in China invented a new parametric oscillator in optoelectronic domain, i.e., an optoelectronic parametric oscillator (OEPO). Oscillation in the OEPO is a phase-controlled operation, leading to unique single-mode and multi-mode oscillation that are hard to achieve in traditional oscillators. The proposed OEPO has great potential in applications such as microwave signal generation, oscillator-based computation, and radio-frequency phase-stable transfer. (2020-06-29)

Scientists present new method for remote sensing of atmospheric dynamics
Physicists from the Moscow Institute of Physics and Technology have developed a new method for wind speed remote measurements. It may complement the widely employed lidar and radar sensing techniques. (2020-06-10)

Topology sheds new light on synchronization in higher-order networks
Research led by Queen Mary University of London, proposes a novel 'higher-order' Kuramoto model that combines topology with dynamical systems and characterises synchronization in higher-order networks for the first time. (2020-05-28)

Towards visible-wavelength passively mode-locked lasers in all-fibre format
Mode-locked fibre lasers are the fundamental building blocks of many photonic systems, ultrafast lasers in the visible region are costly and challenging to make. Chinese scientists have first demonstrated a visible-wavelength passively mode-locked all-fibre laser. The laser generates picosecond pulses at 635 nm, which represents an essential step towards miniaturized ultrafast fibre lasers in the visible light range. The work lays the foundations for use in applications such as material processing, medicine, and optical communications. (2020-05-25)

Malaria runs like clockwork; so does the parasite that causes the disease
A new study uncovers evidence that an intrinsic oscillator drives the blood stage cycle of the malaria parasite, P. falciparum, suggesting parasites have evolved mechanisms to precisely maintain periodicity. Understanding the mechanisms underlying the circadian regulation of host-parasite interactions will ultimately lead to new strategies and treatments to prevent and control parasitic infections. Searching for the genetic components and how they interact to produce this clock-like behavior will enable scientists to hopefully disrupt it. (2020-05-14)

New evidence suggests malaria cycles are innate to the organism
Scientists from the Walter Reed Army Institute of Research joined partners to publish a study providing clear evidence that malaria's characteristic cycle of fever and chills is a result of the parasite's own influence -- not factors from the host. Though the specific signals utilized remain to be elucidated, these findings raise the exciting possibility of disrupting this cycle as an antimalarial strategy. (2020-05-14)

New POP atomic clock design achieves state-of-the-art frequency stability
Chinese researchers led by DENG Jianliao from the Shanghai Institute of Optics and Fine Mechanics (SIOM) have developed a pulsed optically pumped (POP) atomic clock with a frequency stability of 10-15 at 104 seconds based on a new design. (2020-04-21)

Reconstructing the clock of human development
Researchers used iPS cells to reconstructed the human 'segmentation clock,' a key point in early embryonic development that determines how the body gets segmented. The 'segmentation clock' is a genetic oscillator that controls and guides the emergence of 'somites,' distinct collections of cells that contribute to the formation of the vertebrae and ribs. Segmentation clock genes a have been studied extensively in many animals, except humans. (2020-04-01)

Quantum-entangled light from a vibrating membrane
Researchers from the Quantum Optomechanics group at the Niels Bohr Institute, University of Copenhagen, recently entangled two laser beams through bouncing them off the same mechanical resonator, a tensioned membrane. This provides a novel way of entangling disparate electromagnetic fields, from microwave radiation to optical beams. Creating entanglement between optical and microwave fields would be a key step towards solving the challenge of sharing entanglement between two distant quantum computers operating in the microwave regime. (2020-03-31)

Longest microwave quantum link
Physicists at ETH Zurich have demonstrated a five-metre-long microwave quantum link, the longest of its kind date. It can be used both for future quantum computer networks and for experiments in basic quantum physics research. (2020-03-05)

Stimulating resonance with two very different forces
In some specialised oscillators, two driving forces with significantly different frequencies can work together to make the whole system resonate. (2020-02-25)

Powering the future: Smallest all-digital circuit opens doors to 5 nm next-gen semiconductor
Scientists at Tokyo Institute of Technology (Tokyo Tech) and Socionext Inc. have designed the world's smallest all-digital phase-locked loop (PLL). PLLs are critical clocking circuits in virtually all digital applications, and reducing their size and improving their performance is a necessary step to enabling the development of next-generation technologies. (2020-02-10)

A trick for taming terahertz transmissions
Osaka University researchers have invented a wireless communication receiver that can operate in the terahertz frequency band. By increasing the sensitivity 10,000-fold, they achieved the fastest Researchers at Osaka University invent a new receiver for terahertz-frequency radiation -- by implementing coherent detection, they achieve record transmission rates -- this work may lead to much faster wireless data speeds using less power.real-time error-free transmission rates ever recorded. This work may be crucial for next generation cell phone standards and novel remote sensors. (2019-12-02)

A milestone in ultrashort-pulse laser oscillators
With the demonstration of a sub-picosecond thin-disk laser oscillator delivering a record-high 350-W average output power, physicists at ETH Zurich set a new benchmark and pave the path towards even more powerful lasers. (2019-11-12)

Evading Heisenberg isn't easy
EPFL researchers, with colleagues at the University of Cambridge and IBM Research-Zurich, unravel novel dynamics in the interaction between light and mechanical motion with significant implications for quantum measurements designed to evade the influence of the detector in the notorious 'back action limit' problem. (2019-10-31)

JILA team demonstrates model system for distribution of more accurate time signals
JILA physicists and collaborators have demonstrated the first next-generation 'time scale' -- a system that incorporates data from multiple atomic clocks to produce a single highly accurate timekeeping signal for distribution. The JILA time scale outperforms the best existing hubs for disseminating official time worldwide and offers the possibility of providing more accurate time to millions of customers such as financial markets and computer and phone networks. (2019-10-21)

The nano-guitar string that plays itself
Scientists have created a nano-electronic circuit which vibrates without any external force. Just as a guitar string vibrates when plucked, the wire -- 100,000 times thinner than a guitar string -- vibrates when forced into motion by an oscillating voltage. The surprise came when they repeated the experiment without the forcing voltage. Under the right conditions, the wire oscillated of its own accord. The nano-guitar string was playing itself. (2019-10-14)

Graphene sets the stage for the next generation of THz astronomy detectors
Researchers from Chalmers University of Technology have demonstrated a detector made from graphene that could revolutionize the sensors used in next-generation space telescopes. The findings were recently published in the scientific journal Nature Astronomy. (2019-09-11)

NIST physicists create record-setting quantum motion
Showcasing precise control at the quantum level, physicists at the National Institute of Standards and Technology (NIST) have developed a method for making an ion (electrically charged atom) display exact quantities of quantum-level motion -- any specific amount up to 100 packets of energy or 'quanta,' more than five times the previous record high of 17. (2019-07-22)

New study shows nanoscale pendulum coupling
In 1665, Lord Christiaan Huygens found that two pendulum clocks, hung in the same wooden structure, oscillated spontaneously and perfectly in line but in opposite directions: the clocks oscillated in anti-phase. An article published in the journal Physical Review Letters -led by researchers from the University of Barcelona showed a nanoscale version of mechanic oscillators. (2019-07-02)

Building a bridge to the quantum world
Entanglement is one of the main principles of quantum mechanics. Physicists from Professor Johannes Fink's research group at the Institute of Science and Technology Austria (IST Austria) have found a way to use a mechanical oscillator to produce entangled radiation. This method, which the authors published in the current edition of Nature, might prove extremely useful when it comes to connecting quantum computers. (2019-06-26)

Soft robots for all
Each year, soft robots gain new abilities. They can jump, squirm, and grip. Unlike hard robots, they can handle tomatoes without bruising the fruit, resurface unscathed after being run over by a car, and journey through radiation, disaster zones, and outer-space with few scars. Now, a new invention gives soft robots the ability to roll, undulate, sort, meter liquids, and swallow. Customizable designs could find use in labs, hospitals, and even inside the human body. (2019-06-26)

Fishing a line coupled with clockwork for daily rhythm
Cells harbor molecular clocks that generate a circadian oscillation of about 24 h. The cyanobacterial circadian rhythm is regulated by three clock proteins. The research groups at Nagoya City University and National Institutes of Natural Sciences have revealed a sophisticated mechanism of the circadian clock proteins. Their findings have been published in Life Science Alliance. (2019-06-06)

A more accurate, low-cost 39 GHz beamforming transceiver for 5G communications
Researchers at Tokyo Tech and NEC Corporation, Japan, present a 39 GHz transceiver with built-in calibration for fifth-generation (5G) applications. The advantages to be gained include better quality communications as well as cost-effective scalability. (2019-06-03)

A simple, yet versatile, new design for chaotic oscillating circuitry inspired by prime numbers
Researchers at Tokyo Institute of Technology have found a simple, yet highly versatile, way to generate 'chaotic signals' with various features. The technique consists of interconnecting three 'ring oscillators,' effectively making them compete against each other, while controlling their respective strengths and their linkages. The resulting device is rather small and efficient, thus suitable for emerging applications such as realizing wireless networks of sensors. (2019-05-22)

Quantum sensing method measures minuscule magnetic fields
A new technique developed at MIT uses quantum sensors to enable precise measurements of magnetic fields in different directions. (2019-03-15)

Exotic synchronization patterns emerge in a simple network
From the power grid to the PTA, society relies on networks connected to other networks at scales from across the office to around the world. Understanding how connected networks behave and how breakdowns can be identified, prevented or repaired involves mathematics, engineering and physics. Researchers at UC Davis and Caltech now show how complicated and surprising behavior can emerge in a ring of just eight oscillators. (2019-03-07)

One device, many frequencies: Argonne researchers create a unique, tiny resonator
A finding from a team led by scientists at the U.S. Department of Energy's (DOE) Argonne National Laboratory could ultimately help improve the army of tiny, vibrating components found in a range of electronics and even create devices that mimic biological processes. The researchers have pioneered a micromechanical device that responds to external signals in an entirely new way. (2019-03-05)

Immunizing quantum computers against errors
Researchers at ETH Zurich have used trapped calcium ions to demonstrate a new method for making quantum computers immune to errors. To do so, they created a periodic oscillatory state of an ion that circumvents the usual limits to measurement accuracy. (2019-02-27)

Russian physicists trained the oscillatory neural network to recognize images
Physicists from Petrozavodsk State University have proposed a new method for oscillatory neural network to recognize simple images. Such networks with an adjustable synchronous state of individual neurons have, presumably, a dynamics similar to neurons in the living brain. (2019-02-20)

The splendid generative potential of the Sierpinski triangle
One transistor, just a pair of inductors and capacitors. Such a simple electronic circuit can become an oscillator with a surprising richness of behavior. However, even more interesting effects become visible if the structure of connections is fractal and shows some... imperfections. Could similar rules explain the diversity and complexity of the human brain dynamics? (2018-12-13)

Spinal cord injury could throw off body's internal clock, study shows
Although paralysis is the most noticeable result of a spinal cord injury, a new study by researchers at The University of Texas at Austin suggests such injuries could throw off the internal clock of the entire body's daily activities, from hormones to sleep-wake schedules. (2018-12-04)

Smart data enhances atomic force microscopy
In this work, researchers use scanning probe microscopy (SPM) as an example to demonstrate deep data methodology for nanosciences, transitioning from brute-force analytics such as data mining, correlation analysis and unsupervised classification to informed and/or targeted causative data analytics built on sound physical understanding. (2018-11-16)

New analysis about synchronization transitions improves knowledge of physical, biological systems
In physical, biological and technological systems, the time that a system's components take to influence each other can affect the transition to synchronization, an important finding that improves understanding of how these systems function, according to a study led by Georgia State University. (2018-11-06)

New reservoir computer marks first-ever microelectromechanical neural network application
A group of researchers in Canada reports the construction of the first reservoir computing device built with a microelectromechanical system. Published in the Journal of Applied Physics, the neural network exploits the nonlinear dynamics of a microscale silicon beam to perform its calculations. The group's work looks to create devices that can act simultaneously as a sensor and a computer using a fraction of the energy a normal computer would use. (2018-10-16)

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