Delivery of 4.45 µm Fe:ZnSe laser radiation by hollow waveguide

The goal of the presented investigation was to characterize the transmission possibility of 4.45 μm mid-infrared Fe:ZnSe radiation by the hollow glass wave-guide. For this case, a special type of Cyclic Olephin Polymer silver coated (COP/Ag) hollow waveguide was used. The mid infrared radiation at 4.45 μm was generated by a bulk Fe:ZnSe laser working in gain switched regime. The pumping of this laser was realized by electro-optically Q-switched Er:YAG laser which 2.94 μm wavelength coincides with the maximum of Fe:ZnSe active medium absorption peak.the designed simply delivery system for 4.45 μm mid-infrared radiation with the short 240 ns pulse length was successfully investigated and it can be used for the prospective applications.