CAJ | 학술논문

掺 Yb 氟化物激光材料是继掺 Yb 氧化物激光材料之后的另一类重要的掺 Yb 激光材料，已经成为可调谐激光和超快激光领域中研究的热点之一。针对两种国产新型掺 Yb 的氟化物激光材料：混晶材料Yb∶CaF2-SrF2和共掺离子型的单晶材料 Yb，Y∶CaF2，进行了详细的光谱特性比对实验研究。通过荧光比对实验，发现这两类激光材料的荧光光谱完全不同，并分析了不同荧光产生的物理机制。通过吸收率比对实验，讨论了两类材料中的激活离子 Yb 或共掺离子 Y 的掺杂浓度对晶体吸收特性的影响，得到了最佳掺Yb 离子或共掺 Y 离子的浓度。利用激光二极管作为泵浦源，实现了这两类新型材料在折叠腔型下的连续激光输出运转，其中对于共掺离子型 Yb，Y∶CaF2晶体是首次实现连续激光运转。通过激光对比实验，获得了两类激光材料（四种样品）的激光输入—输出关系曲线，测量了各自的斜效率和激光光谱特征。通过系统地比较两类激光晶体的吸收率、荧光光谱特性、激光光谱特性以及连续激光运转的阈值功率和斜效率等参数得出以下结论：在四种实验样品中，共掺离子型单晶材料中的3at％Yb，6at％ Y∶CaF2晶体具有最好的光谱和激光特性，具有良好的应用前景。这些实验结果为进一步提升此类激光材料的性能提供了有益的参考。
참 Yb 불화물격광재료시계참 Yb 양화물격광재료지후적령일류중요적참 Yb 격광재료，이경성위가조해격광화초쾌격광영역중연구적열점지일。침대량충국산신형참 Yb 적불화물격광재료：혼정재료Yb∶CaF2-SrF2화공참리자형적단정재료 Yb，Y∶CaF2，진행료상세적광보특성비대실험연구。통과형광비대실험，발현저량류격광재료적형광광보완전불동，병분석료불동형광산생적물리궤제。통과흡수솔비대실험，토론료량류재료중적격활리자 Yb 혹공참리자 Y 적참잡농도대정체흡수특성적영향，득도료최가참Yb 리자혹공참 Y 리자적농도。이용격광이겁관작위빙포원，실현료저량류신형재료재절첩강형하적련속격광수출운전，기중대우공참리자형 Yb，Y∶CaF2정체시수차실현련속격광운전。통과격광대비실험，획득료량류격광재료（사충양품）적격광수입—수출관계곡선，측량료각자적사효솔화격광광보특정。통과계통지비교량류격광정체적흡수솔、형광광보특성、격광광보특성이급련속격광운전적역치공솔화사효솔등삼수득출이하결론：재사충실험양품중，공참리자형단정재료중적3at％Yb，6at％ Y∶CaF2정체구유최호적광보화격광특성，구유량호적응용전경。저사실험결과위진일보제승차류격광재료적성능제공료유익적삼고。
Yb-doped fluoride crystals are of important another Yb-doped laser materials besides Yb-doped oxide,which are be-coming one of interests for developing tunable lasers and ultrafast lasers.In this paper,the systematic and contrastive experi-ments of the optical spectral characteristics are presented for two types of home-made novel Yb-doped fluoride laser crystals, namely,Yb-doped CaF2-SrF2 mixed crystal and co-doped Yb,Y∶CaF2 single crystal.The fluorescent features of Yb-doped CaF2-SrF2 mixed crystal and co-doped Yb,Y∶CaF2 single crystal are apparently different by the fluorescence experiment.The physical mechanism of these fluorescence spectra were analyzed and proposed.The influence of doping concentrations of active Yb3 + ions or co-doping Y ions on the absorption of Yb-doped CaF2-SrF2 mixed crystal and co-doped Yb,Y∶CaF2 single crystal was experimentally investigated,and the optimal values of doping concentrations of active Yb3 + ions or co-doping Y ions in the two types of fluoride laser crystals were obtained.Continuous-wave laser operation for the two novel fluoride laser crystals has been achieved in three-mirror-folded resonator using a laser diode as the pump source.Therein,the laser operation for the co-doped Yb,Y∶CaF2 crystal is demonstrated for the first time.For the two types of fluoride laser crystals (four samples),the input-output power relational curves,the optical slope efficiencies and the laser spectra were demonstrated by the laser experi-ments.By comparisons between the two types of fluoride laser crystals in the absorbability,fluorescence and laser spectra,laser threshold and slope efficiency of the continuous-wave laser operation,the results show that the best one of the four samples in spectral and laser characteristics is co-doped 3at%Yb,6at% Y∶CaF2 single crystal,which has an expected potential in the ap-plication.The research results provide available references for improving further laser performance of Yb-doped fluoride crys-tals.