Recent advances in femtosecond laser technology have revolutionized ultrafast science. Techniques to produce high-power sub-2-cycle laser pulses with CEP-stabilization and methods to obtain sub-100-as high-harmonic pulses are explained, along with applications to attosecond science. 150-word Biography: Chang Hee Nam received his Ph. D. in plasma physics from Princeton University in 1988. After working at Princeton Plasma Physics Laboratory as a staff research physicist until 1989, he joined KAIST as a faculty member and became a full professor in 1998. He launched the Coherent X-ray Research Center in 1999 and has worked on the development of attosecond high-harmonic light sources along with advanced femtosecond laser technology and on attosecond science. He is a fellow of the American Physical Society and of the Optical Society of America.

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