A nanosecond laser is a type of laser that emits light pulses with a pulse duration in the nanosecond time domain. Commonly available on the market are ultraviolet (UV) nanosecond lasers, green nanosecond lasers, and MOPA (Master Oscillator Power Amplifier) fiber lasers. These lasers find extensive applications in material marking, glass engraving, 3D printing, micro-drilling, wafer dicing, creating black marks on anodized aluminum, etching Indium Tin Oxide (ITO) films, engraving, surface treatment, cutting thin plates, and coating removal.