1. Introduction of sulfur halide materials
It is a kind of infrared material, which can be molded into infrared lens in large quantities. Its physical properties make it more and more widely used in infrared optical lens, and the price is relatively low
Infrared chalcogenide glass
2. Preparation and application of infrared chalcogenide glasses
Chalcogenide glass is a kind of oxygen-free infrared glass formed by s, Se, TE and other metal elements such as GE, GA, as, Sb in the periodic table. It has excellent refractive index temperature coefficient (dN / DT) performance and can be used in infrared imaging optical system as athermal optical element. In addition, the intrinsic characteristics of glass metastability can be used to obtain functional nanocrystalline composite glass ceramics, such as infrared frequency doubling, crystal field enhanced rare earth ion luminescence and infrared transparent nano porous structure. In this project, we will focus on the preparation of new large-size chalcogenide glass, precision molding and Application Research of new infrared optical system, nano crystallization mechanism of chalcogenide glass and preparation and performance of functional chalcogenide glass ceramics.Infrared chalcogenide glass
3. Preparation and application of infrared chalcogenide glass fiber
Chalcogenide glass fiber has high nonlinear coefficient, wide infrared transmission region and low phonon energy. It has important application prospects in mid infrared supercontinuum source, fiber laser and amplifier, Raman fiber laser, stimulated Brillouin fiber laser, fiber sensor and other fields. This project mainly focuses on the preparation of novel chalcogenide glass fiber, mainly involving the structure of step type and photonic crystal fiber, the research on the performance characteristics of fiber and the internal change law of the composition and structure of the matrix glass, the drawing process of low loss chalcogenide fiber, and the application in mid infrared supercontinuum source, Raman fiber laser and other fields.
Infrared chalcogenide glass
4. Preparation and application of infrared chalcogenide glass film
Chalcogenide glasses have excellent nonlinear quality factor, ultra fast nonlinear response time (< In addition, chalcogenide thin films have unique photosensitivity. This project will focus on the composition design and preparation control of chalcogenide glass films, the design and performance of thin film waveguides, the photosensitivity and photo induced change mechanism of chalcogenide glass films, the development of high-speed and high-density optical storage materials, and the development of photonic integrated chips.
6. Material advantages
Chalcogenide glasses have unique advantages as infrared lens materials. The processing efficiency of chalcogenide glass is high, and it can be accurately molded, which is more than 10 times higher than diamond turning, and the raw material cost is 1 / 3 of germanium single crystal. In the temperature adaptation, germanium single crystal is more "delicate", the temperature changes greatly, and the image is unstable. Chalcogenide glass can face a temperature difference of 110 ℃ from minus 40 ℃ to above 70 ℃ without pressure.
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