• Chinese Optics Letters
  • Vol. 20, Issue 2, 021401 (2022)
Zhixian Li1, Min Fu1, Xiaofan Zhao1, Hongye Li1, Zilun Chen1、2、3、*, Zefeng Wang1、2、3、**, and Jinbao Chen1、2、3
Author Affiliations
  • 1College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China
  • 2State Key Laboratory of Pulsed Power Laser Technology, Changsha 410073, China
  • 3Hunan Provincial Key Laboratory of High Energy Laser Technology, Changsha 410073, China
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    DOI: 10.3788/COL202220.021401 Cite this Article Set citation alerts
    Zhixian Li, Min Fu, Xiaofan Zhao, Hongye Li, Zilun Chen, Zefeng Wang, Jinbao Chen. Fabrication of side pump combiners when pumping with a laser diode and a fiber laser[J]. Chinese Optics Letters, 2022, 20(2): 021401 Copy Citation Text show less
    Pump light with different NAs transmitting in the (2 + 1) × 1 side pumping combiner.
    Fig. 1. Pump light with different NAs transmitting in the (2 + 1) × 1 side pumping combiner.
    Transmission paths of pump light with different NAs in the combiner calculated through the geometric method.
    Fig. 2. Transmission paths of pump light with different NAs in the combiner calculated through the geometric method.
    (a) Schematic diagram of the manufacturing system of the combiner, insert: a side microscope picture of the manufactured side pump combiner; (b) the physical picture of a combiner packaged in copper fixture.
    Fig. 3. (a) Schematic diagram of the manufacturing system of the combiner, insert: a side microscope picture of the manufactured side pump combiner; (b) the physical picture of a combiner packaged in copper fixture.
    Scanning diagrams of fusion areas of different side pumping combiner samples; (a), (b) represent the fabrication parameters of combiners designed for LD pumping and YDFL pumping, respectively.
    Fig. 4. Scanning diagrams of fusion areas of different side pumping combiner samples; (a), (b) represent the fabrication parameters of combiners designed for LD pumping and YDFL pumping, respectively.
    Experimental setup of the coupling efficiency and temperature characteristic testing system of combiner 1 (with LD pumping).
    Fig. 5. Experimental setup of the coupling efficiency and temperature characteristic testing system of combiner 1 (with LD pumping).
    Results of pump coupling efficiency and temperature characteristics of combiner 1 when pumped with the LD. Insert: the thermal picture of the home-made side pumping combiner when injecting 2267 W LD pump power.
    Fig. 6. Results of pump coupling efficiency and temperature characteristics of combiner 1 when pumped with the LD. Insert: the thermal picture of the home-made side pumping combiner when injecting 2267 W LD pump power.
    Experimental setup of the coupling efficiency and temperature characteristic testing system of combiner 3 (with YDFL pumping).
    Fig. 7. Experimental setup of the coupling efficiency and temperature characteristic testing system of combiner 3 (with YDFL pumping).
    Results of pump coupling efficiency and temperature characteristics of combiner 3 when pumped with the YDFL. Insert: the thermal picture of the home-made side pumping combiner when injecting 2730 W YDFL pump power.
    Fig. 8. Results of pump coupling efficiency and temperature characteristics of combiner 3 when pumped with the YDFL. Insert: the thermal picture of the home-made side pumping combiner when injecting 2730 W YDFL pump power.
     LD Pump Efficiency (%)YDFL Pump Efficiency (%)Signal Insertion Loss (%)
    Combiner 197.584.53.9
    Combiner 297.086.33.4
    Combiner 385.799.01.7
    Combiner 484.098.31.9
    Table 1. Relationship between the Pump Coupling Efficiency and the Signal Insertion Loss of Different Side Pump Combiners with Different Pump Sources
    Zhixian Li, Min Fu, Xiaofan Zhao, Hongye Li, Zilun Chen, Zefeng Wang, Jinbao Chen. Fabrication of side pump combiners when pumping with a laser diode and a fiber laser[J]. Chinese Optics Letters, 2022, 20(2): 021401
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