Potassium titanyl phosphate, often abbreviated as KTP, is a crystalline material used primarily in nonlinear optics. It is known for its ability to efficiently convert laser light from one wavelength to another, making it valuable in various applications, including laser frequency doubling and optical parametric oscillation. KTP is commonly used in laser systems, particularly in medical and industrial fields. Its unique properties allow it to generate green laser light, which is widely used in laser pointers, surgical lasers, and spectroscopy. The material is appreciated for its high damage threshold and good thermal stability, enhancing its performance in demanding environments.