2007 Volume 76 Issue 2 Pages 115-124
In this paper, we report the recent progress in ultrashort-pulse generation in the relatively low-power region, terawatt-class high-power amplifiers and attosecond-pulse generation in high-order harmonics. In the visible region, pulses are now approaching the monocycle regime by using innovations such as chirp mirrors and adaptive optics. Ti:sapphire amplifiers are now being replaced by optical parametric amplifiers because of their much broader spectrum. The generation and measurement of attosecond pulses have already been achieved, and efforts towards sub-100 attosecond pulses are now being made.
