High damage threshold broadband laser shutter

摘要

A high-damage-threshold broadband laser shutter includes a black diamond absorber plate having a specified density of graphite (sp2) dopant dispersed therein to provide a selected amount of bulk optical absorbance of any incident beam. A heat sink block having a channel therein provides a laser light path to an exit aperture and further has a hard sliding interface on an exit surface thereof. A ferromagnetic frame holds the black diamond absorber plate in a slideable relation against the hard sliding interface of the heat sink block between a first position wherein the diamond absorber plate blocks the light aperture and a second position wherein the diamond absorber plate is located away from the light aperture. Electromagnetic means slide the frame together with the black diamond absorber plate between the first and second positions.