Phys.org  December 14, 2020 Hyperspectral spectroscopy and imaging techniques have proven to be very useful in applications related to food inspection, biochemical sensing or even in cultural heritage, to investigate the structure of the materials used for ancient objects, paintings, or sculptures. A standing challenge has been the absence of compact sources that cover such large spectral range with sufficient brightness. An international team of researchers (Spain, Germany, Russia) has developed a compact high-brightness mid-IR-driven source combining a gas-filled anti-resonant-ring photonic crystal fiber with a novel nonlinear-crystal. The tabletop source provides a seven-octave coherent spectrum from 340 nm to 40,000 […]