Lithium triborate (LiB3O5, LBO) crystal

non-linear opticallaser

LBO crystals is an excellent nonlinear crystal. For frequency doubling(SHG),tripling(THG) of Nd:YAG,Nd:YLF,Nd:YVO4 lasers, it is one of the most useful nonlinear optical materials in ultraviolet and visible laser applications. Advantages: • broad transparency range from 160nm to 2600nm (see Figure 1); • high optical homogeneity (δn≈10-6/cm) and being free of inclusion; • relatively large effective SHG coefficient (about three times that of KDP); • wide acceptance angle and small walk-off; • type I and type II non-critical phase matching (NCPM) in a wide wavelength range; • spectral NCPM near 1300nm. • high damage threshold(18.9 GW/cm 2 for a 1.3ns laser at 1053nm); LBO has the highest damage threshold in all the commonly-used inorganic NLO crystals. Therefore, it is the best candidate for high average power SHG and other nonlinear optical processes.