Excimer Laser Vitiligo

what is Excimer laser ？
Excimer laser is a laser produced when molecules of an inert gas excited by an electron beam and a mixture of halogen gases combine to form molecules to jump into their ground state.Excimer laser is a cold laser without thermal effect. It is a pulse laser with strong directivity, high wavelength purity and large output power. The wavelength range of photon energy is 157-353 nm, and the life span is dozens of nanoseconds.The most common wavelengths are 157 nm, 193 nm, 248 nm, 308 nm, 351-353 nm.