Progress in Third-Harmonic Generation of Broadband Low-Coherence Light
Broadband low-coherence light is expected to overcome the laser-plasma instability in inertial confinement fusion.However,achieving an efficient third-harmonic generation of broadband low-coherence light remains a significant technical problem in engineering applications.Currently,limited research has been done on the third-harmonic generation of broadband low-coherence light.In this study,the characteristics of the broadband low-coherence light are introduced,along with the frequency conversion processes involving second-harmonic and sum frequency generation.Subsequently,the fundamental challenges for an efficient third-harmonic generation with broadband low-coherence light are presented and an overview of the developmental history,principles,and limitations of various broadband third-harmonic generation schemes is provided.In experiments on the frequency conversion of low-coherence light,the acceptance bandwidth and nonlinear coefficients of commonly used nonlinear frequency-conversion crystals are compared for reference.Finally,some suggestions for potential breakthrough directions are proposed for an efficient third-harmonic generation of broadband low-coherence light.
NETL
NSTL
万方数据
