Preparation And Characteristics Of A New Yb³⁺-doped Gain-guided Index Anti-guided Fiber

The proposed of gain-guided and index anti-guided fiber provide a new way for the design offiber lasers to overcome the limitations of traditional fiber lasers, Which is an effective solution toreduce linear effects when increasing fiber diameter. The main aspect of this paper are thetheoretical basis for GG-IAG fiber and preparation technology and applications in fiber lasers andother studies, Details are as follows:(1) Study GG-IAG fiber for each parameter in the formula derivation and theoreticalcalculations, The influence of various parameters on the performance of the optical fiber. Bycontrast, to achieve the most optimized design; provide theoretical support for multi-componentformulation and preparation of phosphate glass fiber behind.(2) From the principle of Yb3+ions levels studied Yb3+-doped and the ion energy levelstructure characteristic absorption and emission spectral characteristics; then, combined thecharacteristics of Yb3+-doped phosphate glass and the fiber core and cladding give formulation.according to the recipe we prepared Laser glass and tested for their density, refractive index tocalculating the stimulated emission cross section and the spontaneous lifetime, The final evaluationof the overall performance of the glass, pointed out the direction of improvement.(3) Study the process for the preparation of optical fiber research. Analysis of perform drawingprocess temperature distribution, and use of multipurpose squeeze out of the tube mechanismprepare appropriate size mandrel and sleeve, and then use the drawing tower prepared GG-IAGfiber, the error introduced in the manufacturing process may be analyzed in order to prepare highquality GG-IAG fiber basis.(4) Presented acid soaking treatment after cutting, grinding and polishing the end face of theoptical fiber to improve the formation and smoothness of the end face, increases the load capacityof the GG-IAG fiber laser.