LASER BEAM ABSORBING DEVICE, AND SOLID-STATE LASER DEVICE INCLUDING THE SAME

摘要

PROBLEM TO BE SOLVED: To obtain a laser beam absorbing device having long-term reliability for a laser beam of several kilowatts by reducing the laser beam intensity on a beam diameter increasing lens as a problem of a conventional laser beam absorbing device to a level sufficient for nonreflective coating on the both surfaces of the beam diameter increasing lens to withstand.

SOLUTION: A diffusion plate 11 having the function of diffusing the laser beam 1a and not applied with the nonreflective coating on the both laser beam 1a incident or outgoing surfaces is disposed in front of the beam diameter increasing lens 8 on the same optical path as that of the beam diameter increasing lens 8 and on the side opposite to a laser beam absorber 2 to increase the diameter of the beam incident upon the beam diameter increasing lens 8.

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