Abstract
Ultra-short pulse laser light sources have been used for scientifi c research for more than two decade. In
spite of this fact, these light sources are not utilized for industrial application. This is because an old
type of ones has instability, large foot print and higher price. Recently, various lasing medium, the type
of lasing medium, stable oscillator and the way of mode locking enable to make not only ultra-short
pulses stable, but a size of light sources compact and a price reasonable. In this paper, current status of
industrial ultra-short pulse laser light source is introduced.
