The development of parametric devices down-converting the laser frequency to the mid-
infrared (3–30 µm) based on non-oxide nonlinear optical crystals is reviewed. Such devices …

There is at present an urgent need for trace detection of high explosives, with applications to
screening of people, packages, luggage, and vehicles. A great concern, because of recent …

Powerful coherent light with a spectrum spanning the mid-infrared (MIR) spectral range is
crucial for a number of applications in natural as well as life sciences, but so far has only …

Nonlinear optical techniques are now recognized as the most efficient means available to
generate laser radiation at wavelengths that are presently inaccessible via conventional …

In the short space of 15years since their first demonstration, quantum cascade lasers have
become the most useful sources of tunable mid-infrared laser radiation. This Letter …

Border control for homeland security faces major challenges worldwide due to chemical
threats from national and/or international terrorism as well as organized crime. A wide range …

Tunability has added an important dimension to a variety of laser devices and led to new
systems and applications. From laser spectroscopy to Bose-Einstein condensation, the one …

The vapor pressures (VPs) of many explosive compounds are extremely low, so determining
accurate values proves difficult. Many researchers, using a variety of methods, have …

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

Continuous wave (cw) diode lasers are increasingly being used as light sources in the
visible and near-IR regions of the spectrum for cavity ring-down spectroscopy (CRDS) and …