Mechanical sensitivity analysis and optimization of a large-aperture KDP frequency converter for higher SHG efficiency.

The effective energy density at the target of inertial confinement fusion facility is subject to the problem of the low efficiency of second harmonic generation of large-aperture KDP frequency converters over a long time. To overcome this problem, we propose the optomechanical analysis method to correlate the mechanical factors with its critical physical performance in theory. Further, combined with experiments and simulations, the mechanical sensitivity of the frequency converter is completely explained from the microscopic and macroscopic perspectives. Finally, we introduce a moment-dominated clamping scheme that is expected to greatly improve the online service performance of the converter.