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Latest Optical cavity Stories

2014-04-07 16:21:31

At St. Paul's Cathedral in London, a section of the dome called the Whispering Gallery makes a whisper audible from the other side of the dome as a result of the way sound waves travel around the curved surface. Researchers at Washington University in St. Louis have used the same phenomenon to build an optical device that may lead to new and more powerful computers that run faster and cooler. Lan Yang, PhD, associate professor of electrical and systems engineering, and her collaborators...

2013-12-23 12:13:10

Soliton water waves can travel several kilometers without any significant change in their shape or amplitude, as opposed to normal waves, which widen as they travel, and eventually disappear. Discovered over 150 years ago in water canals, solitons represent a surprising phenomenon of wave propagation and have been observed in natural phenomena including moving sand dunes and space plasmas. A unique aspect of solitons is that they can retain their shape because of non-linear and dispersive...

2013-07-11 16:11:06

Laser frequency combs-high-precision tools for measuring different colors of light in an ever-growing range of applications such as advanced atomic clocks, medical diagnostics and astronomy-are not only getting smaller but also much easier to make. Physicists at the National Institute of Standards and Technology (NIST) can now make the core of a miniature frequency comb in one minute. Conventional microfabrication techniques, by contrast, may require hours, days or even weeks. The NIST...

Microscale Optical Accelerometer Engineered By Researchers
2012-10-18 10:02:36

Imagine navigating through a grocery store with your cell phone. As you turn down the bread aisle, ads and coupons for hot dog buns and English muffins pop up on your screen. The electronics industry would like to make such personal navigators a reality, but, to do so, they need the next generation of microsensors. Thanks to an ultrasensitive accelerometer–a type of motion detector–developed by researchers at the California Institute of Technology (Caltech) and the University...

Atomic Clocks Get Boost From The Most Stable Laser In The World
2012-09-15 07:00:47

April Flowers for redOrbit.com -- Your Universe Online An international team of scientists has developed a laser with a frequency stability previously unequalled. This is the result of a research cooperation of the Physikalisch-Technische Bundesanstalt (PTB) within the scope of the Excellence Cluster QUEST (Centre for Quantum Engineering and Space-Time Research) with colleagues from the National Institute of Standards and Technology/JILA. Their development, published in the journal...

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2012-08-25 08:19:32

redOrbit Staff & Wire Reports — Your Universe Online A team of Northwestern University researchers have developed a laser that they claim creates the purest, brightest, and most powerful beam ever developed for use in standoff sensing applications. Manijeh Razeghi, a Professor of Electrical Engineering and Computer Science in the university's McCormick School of Engineering and Applied Science, and colleagues have crafted a new resonator that they believe will produce improved...

Getting Good Vibes
2012-08-16 08:35:30

Berkeley Lab and UC Berkeley researchers record first direct observations of quantum effects in an optomechanical system A long-time staple of science fiction is the tractor beam, a technology in which light is used to move massive objects — recall the tractor beam in the movie Star Wars that captured the Millennium Falcon and pulled it into the Death Star. While tractor beams of this sort remain science fiction, beams of light today are being used to mechanically manipulate atoms or...

2012-06-27 17:50:04

Berkeley Lab Development Holds Promise for Nanolasers, LEDs, Optical Sensors and Photonic Communications The world´s smallest three-dimensional optical cavities with the potential to generate the world´s most intense nanolaser beams have been created by a scientific team led by researchers with the U.S. Department of Energy (DOE)´s Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California (UC) Berkeley. In addition to nanolasers, these unique...

A Smarter Way To Make Ultraviolet Light Beams
2011-11-30 04:50:40

Existing coherent ultraviolet light sources are power hungry, bulky and expensive. University of Michigan researchers have found a better way to build compact ultraviolet sources with low power consumption that could improve information storage, microscopy and chemical analysis. A paper on the research is newly published in Optics Express. The research was led by Mona Jarrahi and Tal Carmon, assistant professors in the Department of Electrical Engineering and Computer Science. The...

NIST's Compact Frequency Comb Could Go Places
2011-10-27 04:51:47

Laser frequency combs–extraordinarily precise tools for measuring frequencies (or colors) of light–have helped propel advances in timekeeping, trace gas detection and related physics research to new heights in the past decade. While typical lasers operate at only a single or handful of frequencies, laser frequency combs operate simultaneously at many frequencies, approaching a million for some combs. These combs have very fine, evenly spaced "teeth," each a specific frequency,...


Word of the Day
kenspeckle
  • Having so marked an appearance as easily to be recognized.
This word may come from the Swedish 'kanspak,' quick at recognizing persons or things, or else from confusion with 'conspicuous.'