`Comb on a chip` behind new atomic clock design
California: In a first, researchers have demonstrated a new design for an atomic clock that is based on a chip-scale frequency comb or a microcomb.
The microcomb clock is the first demonstration of all-optical control of the microcomb, and its accurate conversion of optical frequencies to lower microwave frequencies.
Optical frequencies are too high to count but microwave frequencies can be counted with electronics.
"The microcomb clock is one way we might get precision frequency metrology tools out of the lab and into real-world settings," said Scott Diddams from the National Institute of Standards and Technology (NIST) in Maryland.
Frequency combs produce precisely defined frequencies of light that are evenly spaced throughout the comb`s range.
The name comes from the spectrum`s resemblance to the teeth of a pocket comb.
A microcomb generates its set of frequencies from light that gets trapped in the periphery of a tiny silica glass disk, looping around and around the perimeter.
These combs can be astonishingly stable.
"NIST has an ongoing collaboration in this area with researchers from California Institute of Technology (Caltech) who made the two-millimeter-wide silica disk that generates the frequency comb for the new clock," Diddams informed.
The new clock architecture might eventually be used to make portable tools for calibrating frequencies of advanced telecommunications systems or providing microwave signals to boost stability and resolution in radar, navigation and scientific instruments.
The technology also has potential to combine good timekeeping precision with very small size.
The comb clock might be a component of future "NIST on a chip" technologies offering multiple measurement methods and standards in a portable form, said the study which appeared in the journal Optica.
More from India
More from World
More from Sports
More from Entertaiment
- China condemns Pakistan over Uri terror attack
- Indian- Americans launch online petition to declare Pakistan 'sponsor of terrorism'
- DNA: Analysis over who is responsible for tense condition of Kashmir after Burhan Wani's death?
- Congress workers thrash students for showing black flags to Rahul Gandhi in Raebareli
- EU warns Pakistan of political and economic sanctions over atrocities in Baloch
- Onam Bumper Lottery/Kerala Thiruvonam Bumper-2016 BR-51 draw result declared - Here is the winning ticket number
- Uri attack: Israel ready to help India with cutting-edge technology to secure borders
- India's Rafale vs Pakistan's F-16: Why the French fighter jet is the best choice for dogfight
- MNS ultimatum to Pakistani actors: Leave India in 48-hour deadline
- All you need to know about Reliance JioFi at Rs 1,999 – use free data till December 31