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 …

Cavity-enhanced direct frequency comb spectroscopy combines broad bandwidth, high
spectral resolution, and ultrahigh detection sensitivity in one experimental platform based on …

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

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

We present a high-power optical-parametric-oscillator (OPO) based frequency comb in the
mid-IR wavelength region. The system employs periodically poled lithium niobate and is …

We present a new technique suitable for generating broadband phase-and frequency-
locked frequency combs in the mid-infrared. Our source is based on a degenerate optical …

Continuously pumped passive nonlinear cavities can be harnessed for the creation of novel
optical frequency combs. While most research has focused on third-order “Kerr” nonlinear …

We experimentally demonstrate and theoretically explain the onset of optical frequency
combs in a simple cavity-enhanced second-harmonic-generation system, exploiting second …

We study coherence properties of a χ^(2) optical parametric oscillator (OPO), which
produces 2/3-octave-wide spectrum centered at the subharmonic (3120 nm) of the …

Broadband mid-IR output suitable for producing 1000-nm-wide frequency combs centered at
4.9? μm was achieved in a degenerate subharmonic optical parametric oscillator (OPO) …