Tag

Nonlinear Effects

All articles tagged with #nonlinear effects

science-and-technology2 years ago•4 min saved

"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.

via Phys.org|

#full-spectrum #infrared #laser

physics2 years ago•3 min saved

"Linking Subatomic and Massive: Evidence of Dark Matter in Black Hole Mergers"

Two independent teams have shown that gravitational waves emanating from the distorted remnants of black hole mergers should interact with themselves. By including these nonlinear effects in their models, the teams found they could replicate gravitational wave signals from simulated “ringing” black holes up to 100 times more accurately than previous approaches. The results could have important implications for astronomers’ ability to probe the interior structures of black holes from the GW signals they emit during ringdowns and enable researchers to test Albert Einstein’s general theory of relativity in the most extreme environments known to astrophysics.

via physicsworld.com|

#astrophysics #black-holes #general-relativity