https://www.ostphotonics.com/products/crystal-wafers-and-substrates/ OST Photonics can supply lithium niobate (LiNbO3) wafers, lithium tantalate (LiTaO3) wafers, quartz single crystal wafers, various glass and fused silica wafers, GaAs wafers, SiC wafers, InP wafers, sapphire (Al2O3) wafers, Ge wafers and Si wafers in different specifications. Square plates, blanks and crystal boules are also available upon request.