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Latest Atomic clock Stories

Scientists Confirm First 'Frequency Comb' To Probe Ultraviolet Wavelengths
2012-02-02 05:00:46

Physicists at JILA have created the first "frequency comb" in the extreme ultraviolet band of the spectrum, high-energy light less than 100 nanometers (nm) in wavelength. Laser-generated frequency combs are the most accurate method available for precisely measuring frequencies, or colors, of light. In reaching the new band of the spectrum, the JILA experiments demonstrated for the first time a very fine mini-comb-like structure within each subunit, or harmonic, of the larger comb, drastically...

2012-02-01 23:43:34

The ability to accurately measure a second in time is at the heart of many essential technologies; the most recognizable may be the Global Positioning System (GPS). In a paper accepted for publication in the AIP's journal Review of Scientific Instruments, a researcher at the National Institutes of Standards and Technology (NIST) and the University of Colorado at Boulder discusses how achieving a stable and coordinated global measure of time requires more than just the world's most accurate...

Leap Seconds Get A Three Year Reprieve
2012-01-20 09:28:53

An attempt to eliminate leap seconds and permanently change how time is measured has been postponed until 2015 by the International Telecommunications Union. ITU Radio-communication Assembly delegates on Thursday were unable to come to an agreement on whether to stop adding leap seconds to the world´s atomic clocks to keep them synchronized with Earth´s rotational cycles. The ITU will now spend the next three years conducting further studies “to ensure that all the...

Are Leap Seconds Becoming A Thing Of The Past?
2012-01-18 09:32:49

For at least ten years experts have been debating the use of leap seconds, tiny bits of time added to calendars and clocks in hopes of reconciling the difference between atomic time used by computer systems and time as defined by measuring the Earth´s movement around the sun and its daily, but slightly slowing, rotation. Governments have been split on the issue but are expected to make a decision this week at a UN telecom meeting, says the International Telecommunications Union (ITU)...

2011-11-09 08:00:00

SAN JOSE, Calif., Nov. 9, 2011 /PRNewswire/ -- Symmetricom®, Inc. (Nasdaq: SYMM), a worldwide leader in precision time and frequency technologies, today announced their globally recognized timing experts will present at the Precise Time and Time Interval Systems and Applications Meeting (PTTI), November 14 - 17 in Long Beach, California. (Logo: http://photos.prnewswire.com/prnh/20110829/AQ59077LOGO) Symmetricom will be presenting the following technical papers at...

2011-11-08 08:00:00

SAN JOSE, Calif., Nov. 8, 2011 /PRNewswire/ -- Symmetricom®, Inc. (NASDAQ: SYMM), a worldwide leader in precision time and frequency technologies, today announced that it has selected Kyocera America, Inc. to help produce its QUANTUM(TM) SA.45s Chip Scale Atomic Clock (CSAC). Since its market introduction in January 2011, the CSAC has built strong momentum which has created the need for additional manufacturing support and scale to meet global demand. (Logo:...

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,...

2011-10-25 08:00:00

SAN JOSE, Calif., Oct. 25, 2011 /PRNewswire/ -- Symmetricom®, Inc. (NASDAQ: SYMM), a worldwide leader in precision time and frequency technologies, today announced that is has developed a high-performance Rubidium atomic clock for 4G/LTE mobile network equipment. The SA.32m enables base station designs for holdover of +/-1.5 microseconds for up to 24 hours, so that networks remain synchronized even if primary synchronization sources are unavailable. (Logo:...

2011-09-20 08:00:00

SAN JOSE, Calif., Sept. 20, 2011 /PRNewswire/ -- Symmetricom®, Inc. (NASDAQ: SYMM), a worldwide leader in precise time and frequency technologies, today announced that the recently-released SA.45s Chip Scale Atomic Clock (CSAC) is now available with new frequency output options. Introduced in January, the SA.45s CSAC is the first commercially available chip scale atomic clock, enabling portable applications requiring precise synchronization and time keeping in GPS-denied...

Image 1 - New Record For Measurement Of Atomic Lifetime
2011-09-08 05:40:30

  Researchers at the Niels Bohr Institute have measured the lifetime of an extremely stable energy level of magnesium atoms with great precision. Magnesium atoms are used in research with ultra-precise atomic clocks. The new measurements show a lifetime of 2050 seconds, which corresponds to approximately ½ hour. This is the longest lifetime ever measured in a laboratory. The results have been published in the scientific journal Physical Review Letters. The experiment...