Nevertheless, the type-I configuration was normally employed for wavelength tunability of SHG mainly because LN exhibits a big thermo-optic birefringence by using a value of around 4 × ten−five K−one at space temperature. So, a temperature improve in the product would lead to a considerable variation in the material birefringence, https://lithium-niobate-crystal75184.blogpixi.com/32899082/the-basic-principles-of-lithium-niobate-crystal