Ultrafast lasers include nanosecond, picosecond, and femtosecond lasers. Picosecond lasers are an upgrade to nanosecond lasers and use mode-locking technology, while nanosecond lasers use Q-switching technology. Femtosecond lasers use a completely different technology: the light emitted by the seed source is broadened by a pulse expander, amplified by a CPA power amplifier, and finally compressed by a pulse compressor to produce the light. Femtosecond lasers are also divided into different wavelengths such as infrared, green, and ultraviolet, among which infrared lasers have unique advantages in applications. Infrared lasers are used in material processing, surgical operations, electronic communications, aerospace, national defense, basic sciences, etc. TEYU S&A Chiller has developed various ultrafast laser chillers, providing higher precision cooling and temperature control solutions to assist ultrafast lasers to make breakthroughs in precision processing.