SPECTRUM PHASE COMPENSATION METHOD, AND SPECTRUM PHASE COMPENSATION DEVICE

摘要

PROBLEM TO BE SOLVED: To compensate a spectrum phase for generating an ultrashort light pulse of high repetition frequency with an inexpensive and simple device. SOLUTION: The phase compensation for a spectrum of wide-band light Lw is performed by a spectrum phase compensation device 20 having a pair of optical elements 21A and 21B made of positively dispersed media. The optical elements 21A and 21B are each sectioned in a wedge-like shape, are arranged with slopes 21A1and 21B1facing each other, and variable in distance between a light incident surface 21A2and a light emitting surface 21B2parallel to each other by movement of at least one optical element along a slope of the another optical element, and form a parallel flat plate portion 21 having an adjustable thickness t adjusted to a thickness at which a phase difference between adjacent spectra is an integral multiple of 2π. COPYRIGHT: (C)2010,JPO&INPIT