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PTB News
Tech Transfer Streamlines Implementation of Asphere Standards
BRAUNSCHWEIG, Germany, March 10, 2022 — The Physikalisch-Technische Bundesanstalt (PTB, the National Metrology Institute of Germany) reported that it has developed standards for aspheric optics. The standards are intended to improve the calibration of aspheric and freeform surface measuring devices. Aspheres are optics whose shape deviates significantly from the spherical shape. They are essential components of many modern imaging systems. In contrast to spherical optics, aspheres' traceable measurement, with uncertainties in
People in the News: 06/23/21
Jun 23, 2021 — BRAUNSCHWEIG, Germany — Jörn Stenger of Physikalisch-Technische Bundesanstalt (PTB), Germany’s national metrology institute, has begun his term as chairperson of EURAMET, the European Association of National Metrology Institutes....
SLT Sensor Earns AMA Young Enterprises Award
BERLIN, March 29, 2017 — The AMA Association for Sensors and Measurement, as part of its 2017 Innovation Awards, has given its Young Enterprises prize to Jens Karsten Lange’s team at SLT Sensor –und Lasertechnik GmbH. The AMA Innovation Awards recognize sensor...
Laser Measurements Simplify Electronics Testing
BRAUNSCHWEIG, Germany, Dec. 26, 2015 — Femtosecond lasers may provide a cost-effective alternative to conventional vector network analyzers for high-frequency measurements involved in electronics testing. Researchers at Physikalisch-Technische Bundesanstalt (PTB) carried out such...
Fiber optic links may show height differences between optical clocks
GARCHING and BRAUNSCHWEIG, Germany – A new approach transporting frequencies via commercially available fiber makes it possible to use optical atomic clocks to precisely measure height differences between locations thousands of kilometers apart, a development that could have...
Fiber Optic Links May Show Height Differences Between Optical Clocks
GARCHING and BRAUNSCHWEIG, Germany, Oct. 7, 2013 — A new approach uses optical atomic clocks to precisely measure height differences between locations thousands of kilometers apart, a development that could have implications for quantum mechanics, geodesy and radio astronomy. Researchers from the...
Optical Coatings Take a Leap Forward
VIENNA, and BOULDER, Colo., July 23, 2013 — A novel crystalline coating technique that produces low-loss mirrors could help accelerate progress in the development of lasers for precision measurement applications.
‘Hyper’ Ramsey excitation confirmed
BRAUNSCHWEIG, Germany – Shining laser light onto atoms and molecules is the best way to obtain precise information about their inner structure, but light above a certain intensity can fundamentally change their energy levels. A group in Germany has demonstrated how to...
Ambient Temperature Work Advances Optical Clock
BRAUNSCHWEIG, Germany, Jan. 3, 2013 — An optical clock with neutral strontium atoms is considered a strong candidate for the definition of a “new” second, thanks to scientists who have measured, for the first time, the most important uncertainty factor: ambient temperature.
‘Hyper’ Ramsey Excitation Confirmed
BRAUNSCHWEIG, Germany, Nov. 26, 2012 — Shining laser light onto atoms and molecules is the best way to obtain precise information about their inner structure, but light above a certain intensity can fundamentally change their energy levels. A group in Germany has demonstrated how to...
Laser Stability Improved by an Order of Magnitude
BOULDER, Colo., Sept. 12, 2012 — A laser so stable that its frequency varies by no more than two parts in 10,000 trillion represents an approach for constructing high-quality optical cavities that improve prior designs by more than an order of magnitude. The laser was developed and...
Optical Clock Gets New Pendulum
BRAUNSCHWEIG, Germany, March 15, 2012 — An optical clock based on ytterbium ions is so accurate that, if such a timepiece were in use since the universe began, it would now only be off by about 30 seconds.
Sound helps make a better optical clock
BRAUNSCHWEIG,Germany – Optical fibers are commonly used to transmit information and data via modulated light pulses. Now, however, three researchers at Physikalisch-Technische Bundesanstalt (PTB), working with optical frequencies rather than voice or data, are seeking to...
(13 results found)
May 2024
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