In this volume, recent contributions on coherence provide a useful perspective on the
diversity of various coherent sources of emission and coherent related phenomena of
current interest. These papers provide a preamble for a larger collection of contributions
on ultrashort pulse laser generation and ultrashort pulse laser phenomena. Papers
on ultrashort pulse phenomena include works on few cycle pulses, high-power
generation, propagation in various media, and a variety of applications of current interest....