Abstract
This invention discloses a high spectral brightness laser generating device and method thereof, which comprises a laser generator, a dispersion-increasing optical fiber. The laser generator generates a first laser pulse. The dispersion-increasing optical fiber is coupled to the laser generator. The first laser pulse becomes a second laser pulse by passing through the dispersion-increasing optical fiber. The bandwidth of the second laser pulse is narrower than that of the first laser pulse. The unit brightness of the second laser pulse is higher than that of the first laser pulse.