OPTICAL ELEMENT, LASER BEAM OSCILLATION DEVICE, AND LASER BEAM AMPLIFYING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an optical element that can compensate wavelength dispersion of laser beam easier than before. SOLUTION: The optical element 20A is made of a medium having optical transparency, and includes a larger refractive index than air and propagates incident laser beam inside while reflecting it with a wall surface 20a a plurality of times. The optical element includes an incident window 21 disposed at part of the wall surface 20a for making laser beam incident, a projection window 22 disposed at part of the wall surface 20a for projecting the laser beam propagated inside, and wavelength dispersion compensating means 31 and 32 disposed integrally at part of the medium for transmitting or reflecting the laser beam at least twice to compensate wavelength dispersion. COPYRIGHT: (C)2010,JPO&INPIT