Ultrafast lasers are advanced laser systems that emit light pulses lasting only a few femtoseconds, which is one quadrillionth of a second. These incredibly short pulses allow scientists to study rapid processes in various fields, including chemistry and physics, by capturing events that occur on extremely short timescales. These lasers are used in a variety of applications, such as medical imaging, material processing, and spectroscopy. Their ability to deliver high peak power in brief bursts makes them valuable tools for researchers and industries looking to explore and manipulate matter at the atomic and molecular levels.