Performance Calculation And Experimental Research Of Laser Glasses

Laser glasses are the core material of laser weapons,laser nuclear fusion,and fiber lasers.With the progress of society and the development of science and technology,the performance calculation and rapid development of laser glasses are crucial.At present,the development of laser glasses is uausually based on intuition and a trial-and-error method,which can involve long experimental periods and high costs,and thus,this approach is highly inefficient.This trial-and-error method limits the development of laser glasses and its application fields.How to realize the performance calculation and efficient development of laser glasses based on small amount of data has become a key scientific problem to be solved urgently in the field of glass materials.Recently,the proposals for materials genome engineering have provided a new research ideal for the development of new materials.Based on the research concept of materials genome engineering and glass phase diagram structure model,this paper innovatively proposes the glass gene method to perform the performance calculation and composition optimization of laser glasses.In order to verify the effectiveness of the glass gene method,performance calculation and experimental verification were first performed in ordinary phosphate laser glasses.Subsequently,the glass gene method was extended to borate and germanate laser glasses with abnormal properties for performance calculation and experimental verification.Finnally,the compositions of high-performance laser glasses were evaluated based on the glass gene method,and then a high-gain component multimaterial glass fiber was prepared.The specific research content and research results obtained are:?1?The glass gene method is proposed to calculate the performance of laser glasses.According to the first-principles calculation data and phase diagram data,the corresponding composition diagram of the glass system is constructed,and the neighboring congruently melted glassy compound?NCMGC?in the composition diagram are used as the glass gene,which can be used to calculate the performance of laser glasses.That is,using the NCMGC as a bridge,the performance calculation and component optimization of the laser glass are realized.?2?The physical properties and luminescence properties of Nd³⁺doped phosphate laser glasses?BaO-P₂O₅ and BaO-Al₂O₃-P₂O₅?and borate laser glasses?B₂O₃-Li₂O and B₂O₃-Li₂O-MgO?were calculated using the glass gene method,and experimental verification,the experimental results are basically consistent with the calculation results.In addition,the glass gene method can also calculate the"boron anomaly"of R₂O-B₂O₃ borate glasses.It indicates that the glass gene method is an effective method for performance calculation of glasses.In Nd³⁺-doped BaO-Al₂O₃-P₂O₅ ternary phosphate laser glasses,the glass formula with better luminescence performance is 10BaO-5Al₂O₃-84P₂O₅?mol%?.In Nd³⁺-doped B₂O₃-Li₂O-MgO borate laser glasses,the glass formula with better luminescence performance is 59B₂O₃-20MgO-20Li₂O?mol%?.?3?Using the glass gene method,the luminescence properties of Tm³⁺-doped germanate?BaO-Ge O₂,BaO-La₂O₃-Ge O₂,and BaO-Ga₂O₃-Ge O₂?laser glass were calculated,and experimental verification was performed.The relative error of the results is generally within10%.In the BaO-La₂O₃-Ge O₂ laser glass system,the preferred laser glass formulation is15BaO-5La₂O₃-79.2Ge O₂?mol%?.In the BaO-Ga₂O₃-Ge O₂ laser glass system,the preferred laser glass formulation is 10BaO-15Ga₂O₃-74.2Ge O₂?mol%?.The density and refractive index of Li₂O-Ge O₂ and Na₂O-Ge O₂ glass systems were calculated using the glass gene method.The maximum relative errors between the calculated values of density and refractive index and the experimental values were-2.83%and-1.32%,respectively.In addition,the"germanium anomaly"phenomenon can also be observed.The anomalies of the Li₂O-Ge O₂and Na₂O-Ge O₂ glass systems occur when the alkali metal content is 19 mol%and 16 mol%,respectively,indicating that the glass gene method can calculate germanium anomalies.?4?Adopt glass gene method to design high-gain multimaterial glass fiber.Based on the glass gene method,the glass formulation with better luminescence performance in Tm³⁺doped Y₂O₃-Al₂O₃-Si O₂ silicate laser glasses was evaluated.Then,using Tm:YAG as the precursor material,a high-gain component composite glass fiber was successfully prepared by controlling the element diffusion in the molten core method by controlling the drawing process.The resulting core formula was 14.15Al₂O₃-77.11Si O₂-6.49Y₂O₃-2.25Tm₂O₃?mol%?.The unit length gain of multimaterial fiber was measured to be 2.7 d B/cm at 1950 nm,which is the largest unit length gain of this type of fiber reported so far.A DBR fiber laser was constructed using the 2 cm long gain fiber.With 1610 nm pumping,a single-frequency laser output of 135 m W at 1950 nm was achieved.Additionally,a picosecond pulsed laser output of2?m band is realized based on the composite glass fiber,with a repetition frequency of 26.45MHz and with duration of 380 ps.