In laser fusion research, scattering light, such as Stimulated Brillouin scattering, causes significant energy loss in incident light and is a key focus. Therefore, scattering light diagnostic systems are developed on Large laser facilities, such as SG-100 kj and National Ignition Facility. The core of scattering light diagnosis is the calibration of energy coefficients. Scattered light that dominates in energy, is emitted in the reverse direction of the laser channel, wich is call full aperture scattered light. since the optical components on the laser channel are difficult to disassemble and install, online calibration is essential. This report details the development of scattering light calibration technology on a large - scale laser facility, focusing on polarization property calibration using multimode fibers, wire -grid polarizers, and other components.

Stimulated scattering