Remote chemical detection in the atmosphere or some specific space has always been of
great interest in many applications for environmental protection and safety. Laser absorption …

The availability of silicon photonic integrated circuits (ICs) in the 2–4 μm wavelength range
enables miniature optical sensors for trace gas and bio-molecule detection. In this paper, we …

The synthesis of multiple narrow optical spectral lines, precisely and independently tuned
across the near-to mid-infrared region, is a pivotal research area that enables selective and …

Silicon photonics is a promising integrated-optics platform for optical communication and
sensing applications. Integrating 2–3 μm wavelength widely tunable lasers on silicon …

Free-space laser communications offer a promising alternative for broadband data
transmission in places where fiber optics are impractical. This technology, particularly …

In absorption spectroscopy, analysis of multicomponent gas mixtures becomes challenging
when absorption features overlap (blended spectra). Here we propose a gas sensor which …

Mid-infrared spectroscopy in the 2-4 μm wavelength range is of cardinal value for many
sensing applications. Current solutions involve bulky and expensive systems to operate …

The purpose of this article is to gather recent findings about the non-linear dynamics of
distributed feedback quantum cascade lasers (QCLs), with a view on practical applications …

An optoelectronic sensor system based on a thermoelectrically cooled (TEC) continuous-
wave (CW) double-mode external-cavity diode laser (ECDL) is demonstrated for a multi-gas …

Multi-spectral midwave-infrared (mid-IR) lasers are demonstrated by directly bonding
quantum cascade epitaxial gain layers to silicon-on-insulator (SOI) waveguides with arrayed …