Method for making optical fiber spherical-surface micro lens in three steps of corrosion, cutting and hot melting
A technology of microlens and optical fiber, which is applied in the coupling of optical waveguide, light guide, optics, etc. It can solve the problems of large size error, influence on coupling effect, uncontrollable curvature radius of optical fiber spherical microlens, etc., and achieve accurate size and good coupling effect Effect
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[0019] Such as figure 1 , 2 , 3, 4, and 5: 1 is HF acid solution, and the optical fiber is composed of the inner core 3 and the outer cladding 4.
[0020] The steps of the present invention are:
[0021] ① Corrosion: Use HF acid 1 to etch the end of the optical fiber to make the diameter 2d of the outer layer of the end of the optical fiber become smaller and form a transition shape with the uncorroded part through the tapered surface 5. There is an organic covering layer 2 above the HF acid solution 1, and the organic covering layer 2 is an organic covering layer of dimethylbenzene or other materials.
[0022] ② Cut the flat end face, and cut off the small diameter d formed by the end of the optical fiber, and the end of the optical fiber will be round truncated cone after cutting;
[0023] ③Using the temperature field 7 generated by the electrode 6 to heat-melt the end of the optical fiber to form a spherical optical fiber microlens, the radius of curvature of the spherical surface ...
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