Mid-IR high power transmission through chalcogenide glass fibers

Chalcogenide fibers which are being developed at the Naval Research Laboratory have low optical loss and good mechanical strength, making them practical for use in a variety of mid-infrared applications, including fiber-coupled laser threat warning systems and fiber optic chemical sensors. Current results for both CW and pulsed laser transmission through these chalcogenide fibers in the 2-11 micron wavelength region will be presented. Results and predictions for laser induced optical damage thresholds for glass and fiber will also be discussed. Important issues for optimum infrared power delivery will be addressed, including a novel fiber end termination method and antireflection coatings for the fiber endfaces.