Fig. 1. Propagation process of laser in the fiber signal combiner

Fig. 2. Beam quality and transmission efficiency of combiner with different cladding diameters of input fiber

Fig. 3. Cross section of TFB at splicing point

Fig. 4. Stripped fiber

Fig. 5. Splicing point between TFB and output fiber

Fig. 6. Beam quality of lasers fused with the 25/400 μm end cap is (a) M²=1.27; (b) M²=1.30; (c) M²=1.36

Fig. 6. [in Chinese]

Fig. 7. Device for testing output power of combiner

Fig. 8. Measured result of beam quality at 8 620 W output power

Fig. 9. Beam quality of the combiner with the increase of output power