Special optical fiber coupler
A fiber coupler, a special technology, used in the laser field, can solve the problems of low light energy utilization rate, small volume, gain effect, pump light utilization rate, etc., and achieve high gain effect, high utilization rate, and small volume.
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Embodiment 1
[0015] Example 1, such as figure 1 or figure 2 As shown, more than two optical fiber rings 3 are stacked sequentially from bottom to top. The working principle of this embodiment 1 is as follows: Taking the coupling ratio of 50% / 50% as an example, when the pump light is transmitted in a fiber ring 3 and reaches the coupling intersection point of two fiber rings 3, there is 50% of the optical coupling Enter the next fiber ring 3, and 50% of the light moves along the closed fiber ring 3 and returns to the coupling point (actually, some light will be coupled into the previous fiber ring 3, but here it is assumed that the 50 % of the light moves in the fiber ring 3 without being coupled into the previous fiber ring 3), and 25% (50%×50%) of the light returning to the coupling point will be coupled into the next fiber ring 3 again, By analogy, eventually close to 100% light will still be coupled into the next fiber ring 3, but in the gain fiber of the same length, the number of t...
Embodiment 2
[0017] Example 2, such as image 3 As shown, the working principle of embodiment 2 is the same as that of example 1, the difference is that there are differences in the spatial arrangement of the optical fiber rings 3, and the specific differences are as follows: two or more optical fiber rings 3 are closely arranged together from the inside to the outside to form a ring-shaped fiber bundle.
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