Lithium Triborate LiB3O5 FOR SHG
SHG (Second Harmonic Generation)
LBO Crystal is phase matchable for the SHG and THG of Nd:YAG and Nd:YLF lasers, using either type I or type II interaction. For the SHG at room temperature, type I phase matching LBO can be reached and has the maximum effective SHG coefficient in the principal XY and XZ planes in a wide wavelength range from 551nm to about 2600nm. LBO crystals optimum type II phase matching falls in principal YZ and XZ planes.
SHG conversion efficiencies of more than 70% for pulse and 30% for cw Nd:YAG lasers, and THG conversion efficiency over 60% for pulse Nd:YAG laser have been observed by using LBO crystal.
LBO (Lithium troborae or LiB3O5) Is a nonlinear crystal that offers several unique and very important characteristics
LBO material is widely recognized for these features:
Wide transparency range (210 nm – 2300 nm)
Moderately nonlinear coupling
High damage threshold
Good chemical and mechanical properties
For LBO Crystal type I SHG of 1000 nm – 1300 nm is free of walk off limitations
Free of gray track effect
LBO FOR SHG
Second Harmonic Generation (SHG) is a nonlinear optical process whereby the pumping wavelength generates a new wavelength that is half of the input wavelength or double frequency.