KTP (KTiOPO4) is a nonlinear optical crystal, which possesses excellent nonlinear, electrooptical and acousto­optical properties. A combination of high nonlinear coefficient, wide transparency range, and broad angular as well as thermal acceptance makes KTP very attractive for different nonlinear optical and wavequide applications.
KTP is a standard crystal with the parameters mostly used in extracavity configuration when the single pass through the crystal is required.
KTP crystals are optimised for SHG intracavity configuration in low peak power CW lasers. Because of large number of passes through the crystal low insertion losses and high homogeneity are essential for crystal efficiency. The special highest quality material selected by SHG efficiency mapping of each crystal, fine surface polishing and dual band AR coatings with very low losses allow PHOTONIK to produce KTP crystals suitable for infracavity SHG application.