Research Progress of Ultraviolet Nonlinear Optical Crystal K3B6O10Br(Invited)
Using nonlinear optical crystals for laser frequency conversion is a key method for extending laser wavelengths.These crystals,particularly borates,are crucial in all solid-state laser systems,especially for ultraviolet laser output,due to their diverse structures and superior optical properties.The K3B6O10Br crystal,notable for its short ultraviolet cutoff edge(182 nm),significant nonlinear optical coefficient(d22 of 0.83 pm/V),and moderate birefringence index(0.046@1064 nm),shows promise in second and third harmonic laser output.This article provides an overview of the growth and fundamental characteristics of the K3B6O10Br crystal.Recent advancements in visible/ultraviolet lasers and optical parametric chirped pulse amplification,achieved through crystal frequency doubling and sum frequency techniques,are summarized.Additionally,the potential future developments and applications of the K3B6O10Br crystal are explored in this study.
nonlinear optical crystalultraviolet laserK3B6O10Brlaser frequency conversion