"Water: A Nonlinear Medium for Ultra-Broadband White Laser"

Researchers at South China University of Technology have developed an ultrabroadband white laser using water as a nonlinear medium, addressing challenges faced by traditional solid materials and gas mediums. By combining water with a chirped periodic-poled lithium niobate crystal, they achieved a supercontinuum white laser with a 10 dB bandwidth covering an impressive 478–913 nm range, offering potential applications in ultrafast spectroscopy and hyperspectral imaging. This innovation provides a long-lived, high-stability, and low-cost technical route for creating a white laser with intense pulse energy, high spectral flatness, and ultrabroad bandwidth, opening new possibilities in scientific research and applications.