Numerical analysis of cascade lasing in Ho:ZBLAN fiber lasers with efficient output at ∼750 nm
Numerical analysis of cascade lasing in Ho:ZBLAN fiber lasers with efficient output at ∼750 nm
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DOI：
10.1016/j.optcom.2024.130385
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发表时间：
2024-02
影响因子：
2.4
通讯作者：
Anxin Yu;Peng Wang;Kaiqi Xu;Xindie Chen;Yaolin Fei;Wensong Li
中科院分区：
文献类型：
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作者：
Anxin Yu;Peng Wang;Kaiqi Xu;Xindie Chen;Yaolin Fei;Wensong Li
蓝光激光二极管（LD）的最新进展使掺稀土氟化物光纤中的可见光激光运转成为可能。因此，研究蓝光二极管直接泵浦的可见光光纤激光器的功率定标具有重要意义。在这项研究中，我们数值研究了连续波（CW）Ho：ZBLAN光纤激光器的性能约750 nm的5F4，5S2→ 5I7跃迁使用级联激射过程。在450 nm处的直接二极管泵浦与双包层光纤几何形状结合使用。同时产生的中间IR 5I7 → 5I8跃迁激光有效地减少了5I7能级的数量，并显著提高了效率和功率可扩展性。当泵浦功率为30 W时，计算得到的连续波输出功率为14.2 W，斜率效率为49%。这项研究表明，在一个有效的Ho：ZBLAN 750 nm光纤激光器的发展，减少低激光水平的意义，并提供了一种替代方法，为发展高功率可见光激光源。
Recent advances in blue-emitting laser diodes (LDs) have enabled visible laser operation in rare-earth-doped fluoride fibers. Therefore, investigation of the power scaling of visible fiber lasers enabled by direct blue diode pumping is significant. In this study, we numerically investigated the performance of a continuous-wave (CW) Ho:ZBLAN fiber laser operating at approximately 750 nm for the5F4,5S2→5I7transition using a cascade lasing process. Direct diode pumping at 450 nm is used in conjunction with double-clad fiber geometry. Simultaneous lasing for the mid-IR5I7→5I8transition effectively depopulated the5I7level and significantly enhanced efficiency and power scalability. A slope efficiency of 49% was associated with the calculated CW output power of 14.2 W at a launched pump power of 30 W. This study demonstrates the significance of depopulating the lower laser level in the development of an efficient Ho:ZBLAN 750 nm fiber laser and offers an alternative approach for developing high-power visible laser sources.