Potassium Titanyl Phosphate, often abbreviated as KTP, is a crystalline material commonly used 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 typically used in solid-state lasers and is favored for its high damage threshold and good thermal conductivity. Its unique properties allow it to generate green laser light, which is widely used in laser pointers, medical devices, and industrial applications.