Random fluctuations in the intensity and energy of X-ray lasers, which generally limit performance, have been harnessed for high-resolution spectroscopy. Li and colleagues use an XFEL to produce a ...

Coupling mid-infrared “idler” photons with near-infrared “signal” photons enables cheaper, smaller and more efficient machines for uses such as greenhouse gas monitoring to medical diagnostics.

This study demonstrates a compact optical modulation platform that enables real-time, high-resolution spectroscopy using sub-MHz interleaved combs generated via chip-scale acousto-optic phase ...