"Breakthrough: Scientists Unveil Full-Spectrum Laser with Unprecedented Intensity"
Scientists have developed a cascaded architecture of gas-filled hollow-core fiber, a lithium niobate crystal plate, and a specially designed chirped periodically poled lithium niobate crystal to generate an intense four-octave-spanning ultraviolet-visible-infrared (UV-Vis-IR) full-spectrum laser. By harnessing the synergic action of second-order nonlinear (2nd-NL) high harmonic generation (HHG) and third-order nonlinear (3rd-NL) self-phase modulation (SPM) effects, the laser achieves an extremely large bandwidth, high-flatness spectral profile, and large pulse energy. This breakthrough could have applications in optical spectroscopy, physics, chemistry, biology, materials science, information technology, industrial processing, and environmental monitoring.