Mid-infrared (MIR) spectrometers are invaluable tools for molecular fingerprinting and hyper-
spectral imaging. Among the available spectroscopic approaches, GHz MIR dual-comb …

After five decades of development, mode-locked lasers have become significant building
blocks for many optical systems in scientific research, industry, and biomedicine. Advances …

We demonstrate the first compact photonic flywheel with sub-fs time jitter (averaging times
up to 10 μ s) at the quantum-noise limit of a monolithic fiber resonator. Such quantum-limited …

Optical frequency combs have enabled distinct advantages in broadband, high-resolution
spectroscopy and precision interferometry. However, quantum mechanics ultimately limits …

Frequency combs with mode spacing of 10–20 GHz are critical for increasingly important
applications such as astronomical spectrograph calibration, high-speed dual-comb …

Broadband dual-comb spectroscopy (DCS) based on portable mode-locked fiber frequency
combs is a powerful tool for in situ, calibration-free, multi-species spectroscopy. While the …

A self-referenced optical frequency comb is presented based on Kerr-lens mode-locking of
ytterbium-doped CALGO. The robust source delivers 3.5 W average power in 44 fs-long …

Coherent frequency division of high-stability optical sources permits the extraction of
microwave signals with ultra-low phase noise, enabling their application to systems with …

Optical frequency combs are essential tools for precision metrology experiments ranging in
application from remote spectroscopic sensing of trace gases to the characterization and …

Dual-frequency comb spectroscopy permits broadband precision spectroscopy with high
acquisition rate. The combs' repetition rates as well as the mutual coherence between the …