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

Infrared laser-absorption spectroscopy (IR-LAS) sensors play an important role in
diagnosing and characterizing a wide range of combustion systems. Of all the laser …

Two decades after its invention, the classic self-referenced frequency comb laser is an
unrivalled ruler for frequency, time and distance metrology owing to the rigid spacing of its …

Atmospheric methane plays a major role in controlling climate, yet contemporary methane
trends (1982–2017) have defied explanation with numerous, often conflicting, hypotheses …

Spectroscopy in the molecular fingerprint spectral region (6.7–20 µm) yields critical
information on material structure for physical, chemical, and biological sciences. Despite …

The recent demonstration of dissipative Kerr solitons in microresonators has opened a new
pathway for the generation of ultrashort pulses and low-noise frequency combs with …

Dual-comb spectroscopy holds the promise as real-time, high-resolution spectroscopy tools.
However, in its conventional schemes, the stringent requirement on the coherence between …

Photoacoustic spectroscopy (PAS) based gas sensors with high sensitivity, wide dynamic
range, low cost, and small footprint are desirable in energy, environment, safety, and public …

A coherent, compact and robust light source with coverage from the ultraviolet to the infrared
is desirable for heterodyne super-resolution imaging, broadband infrared microscopy …

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 …