Gases in the environment can be spectroscopically probed fast and precisely using so-called dual frequency combs. Researchers at ETH have now developed a method by which such frequency combs can be created much more simply ...
Optics & Photonics
May 12, 2017
0
21
Northwestern University researchers have designed a quantum cascade laser (QCL) frequency comb that is dramatically more efficient than previous iterations.
Optics & Photonics
Mar 7, 2017
0
7
A micromechanical device generates a series of precise, equally spaced vibration frequencies, analogous to the light of the "optical frequency comb," which has dramatically improved precision measurements and could lead to ...
Optics & Photonics
Mar 6, 2017
4
16
EPFL scientists have found a way to miniaturize frequency combs, realizing a new step toward miniaturization of such tools. Their device can measure light oscillations with a precision of 12 digits.
Optics & Photonics
Feb 14, 2017
0
18
A group of scientists from TU Wien and ETH Zurich have succeeded in their attempts to generate ultrashort terahertz light pulses. With lengths of just a few picoseconds, these pulses are ideally suited to spectroscopic applications ...
Optics & Photonics
Feb 13, 2017
0
2061
When measuring the duration of high-speed physical phenomena, a good stopwatch can only get you so far, and while oscilloscopes can pick up electrical signals with frequencies of a few GHz, measuring incredibly fast optical ...
Optics & Photonics
Jan 30, 2017
0
19
For the first time, an optical clock has traveled to space, surviving harsh rocket launch conditions and successfully operating under the microgravity that would be experienced on a satellite. This demonstration brings optical ...
Optics & Photonics
Nov 17, 2016
0
1098
JILA physicists and colleagues have identified a long-missing piece in the puzzle of exactly how fossil fuel combustion contributes to air pollution and a warming climate. Performing chemistry experiments in a new way, they ...
Materials Science
Oct 27, 2016
0
760
Frequency synthesizers from audio frequency to the microwave region have been widely used in daily life, high technology and scientific research. Those frequency synthesizers can output a signal with frequency related to ...
Optics & Photonics
Oct 21, 2016
0
16
An international team of researchers, led by the National Institute of Standards and Technology (NIST), based in Gaithersburg, Maryland, has advanced their work with synchronizing a remote optical clock with a master clock ...
General Physics
Oct 11, 2016
1
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