Dual-comb spectroscopy is an emerging new spectroscopic tool that exploits the frequency
resolution, frequency accuracy, broad bandwidth, and brightness of frequency combs for …

Optical-frequency synthesizers, which generate frequency-stable light from a single
microwave-frequency reference, are revolutionizing ultrafast science and metrology, but …

The invention of optical frequency combs (OFCs) based on femtosecond (fs) mode-locked
lasers has merged laser based spectroscopy with fs-laser technology. OFCs have triggered …

Precision time references in space are of major importance to satellite-based fundamental
science, global satellite navigation, earth observation, and satellite formation flying. Here we …

Increasing our understanding of regional greenhouse gas transport, sources, and sinks
requires accurate, precise, continuous measurements of small gas enhancements over long …

A fully stabilized all polarization-maintaining Er frequency comb with a nonlinear amplifying
loop mirror with below 0.2 rad carrier-envelope-offset frequency phase noise is …

We describe the design, fabrication, and performance of a self-referenced, optically coherent
frequency comb. The system robustness is derived from a combination of an optics package …

Identification and quantification of trace-gas sources is a major challenge for understanding
and regulating air quality and greenhouse gas emissions. Current approaches provide …

Dual-comb technique has enabled exciting applications in high resolution spectroscopy,
precision distance measurements, and 3D imaging. Major advantages over traditional …

Recent advances in optical atomic clocks and optical time transfer have enabled new
possibilities in precision metrology for both tests of fundamental physics and timing …