Research Progress in Chalcogenide Glass Infrared Optical Fibers for Fiber Optic Image Bundles
With the development of detection technology and optical fiber materials,as well as the increasing demand for infrared region detection,advancing the development of infrared optical fibers is becoming increasingly important.The transmission wavelength of chalcogenide glass infrared fibers can reach 25 μm,which can compensate for the disadvantage that the infrared transmission range of halide glass fibers is limited only to 6 μm.The chalcogenide glass infrared fibers have shown attractive properties including visible,mid-infrared and far-infrared transparency,low phonon energy,high third-order optical nonlinearity coefficient,extreme high Raman gain coefficient,and easily designed components,so as to can satisfy infrared detections and lots of application requirements.The research progress of infrared fiber image bundles,chalcogenide glass,and chalcogenide glass infrared fibers both domestically and internationally is systematically introduced,including the development of infrared fiber image bundles,preparation and impurity removal methods of chalcogenide glass,and preparation and drawing methods of chalcogenide glass infrared fibers.Based on the structure-activity relationship of infrared fiber loss,the current problems and future development trends in related fields are pointed out,in order to provide reference for the research and application of chalcogenide glass infrared fibers for optical fiber image bundles in the future.
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