From monitoring concentrations of greenhouse gases to detecting COVID in the breath, laser systems known as frequency combs can identify specific molecules as simple as carbon dioxide and as complex ...

Researchers at NIST have upgraded their laser frequency-comb instrument to simultaneously measure three airborne greenhouse gases -- nitrous oxide, carbon dioxide and water vapor -- plus the major air ...

Optical frequency combs are specially designed lasers that act like rulers to accurately and rapidly measure specific frequencies of light. They can be used to detect and identify chemicals and ...

Graduate student Qizhong Liang adjusts JILA's frequency comb breathalyzer, which identifies molecules associated with disease based on colors and amounts of light absorbed inside the tube (left) ...

Tiny concentrations Qizhong Liang in Jun Ye's lab at JILA on the campus of the University Colorado Boulder. Liang and colleagues have developed a new technique for measuring trace concentrations of ...

Ringing in the new: microscope image of a ring laser used by the Harvard group. (Courtesy: Capasso Lab/Harvard SEAS) Frequency combs are one of the most important developments in metrology in the 21st ...

With the advancement of laser technology, ultrashort pulsating lasers give a new technological technique for highly precise spectroscopic measurement. To precisely monitor wavelengths, the optical ...

For a long time, scientists have been looking for simple methods to produce infrared laser pulses. Now a new method has been presented that does not require large experimental setups; it can be easily ...

Researchers at the National Institute of Standards and Technology (NIST) have upgraded their laser frequency-comb instrument to simultaneously measure three airborne greenhouse gases -- nitrous oxide, ...