Lithium Tetra Borate



Lithium Tetra Borate (LBO or LiB3O5) is a known non-linear crystal with a high transmission range from the VUV to IR. Its high damage threshold and its chemical and mechanical properties makes it suitable for non-linear optical applications. That is why it is often used for frequency doubling of Nd:YAG lasers. The high energy band gap makes it resistant against UV radiation.


The LBO crystals can be used for SHG (second harmonic generation) and THG (third harmonic generation) of pulsed Nd:YAG lasers, Ti:Sapphire lasers and dye lasers where also high pulse energies are allowed. Another application is the frequency conversion of cw and quasi-cw radiation by non-critical phase matching (NCPM). An OPO (optical parametric oscillator) can be set up with both by type I as well as by type II phase-matching. The crystals work also well for optical parametric chirped-pulse amplification (OPCPA).