Laser frequency combs are coherent light sources that emit a broad spectrum of discrete,
evenly spaced narrow lines whose absolute frequency can be measured to within the …

We demonstrate broadband frequency comb generation in the mid-infrared (MIR) from 2.3 to
3.5 μm in a Si 3 N 4 microresonator. We engineer the dispersion of the structure in the MIR …

Dual-comb spectroscopy performed in the mid-infrared—where molecules have their
strongest rotovibrational absorption lines—offers the promise of high spectral resolution …

Optical frequency combs are a revolutionary light source for high-precision spectroscopy
because of their narrow linewidths and precise frequency spacing. Generation of such …

With the rapid development of laser technology, information technology, and materials, the
detection of trace gas has been taken to a new level. Advanced analytical methods were …

The mid-infrared spectral range (λ~ 2–20 μm) is of particular importance as many molecules
exhibit strong vibrational fingerprints in this region. Optical frequency combs—broadband …

Two coherent frequency combs are used to measure the full complex response of a sample
in a configuration analogous to a dispersive Fourier transform spectrometer, infrared time …

Broad-bandwidth, high-spectral-resolution optical detection of human breath has identified
multiple important biomarkers correlated with specific diseases and metabolic processes …

Nonlinear optical frequency conversion is one of the most versatile methods to generate
wavelength-tunable laser light in the mid-infrared region. This spectral region is particularly …

On-chip integration of optical comb sources is crucial in enabling their widespread use.
Integrated photonic devices that can be massmanufactured in semiconductor processing …