The propagation of light in an optical fiber is mainly based on the principle of total reflection. When the light is perpendicular to the fiber end face and coincides with the fiber axis, the light propagates forward along the axis. If the curvature is too large, some of the light will not pass normally, which will cause the optical power to drop, resulting in the received The quality is getting worse, so the speed is slower. Which manufacturer of Fiber Optic Splice Closure will share the degree of fiber bending suitable for use?
Under normal circumstances, when the optical fiber is long, it can be coiled into a ring and then tied together, but the diameter of the circle should not be too small, to avoid the excessive degree of light, the optical signal can not be refracted and transmitted to the opposite end. Generally, the diameter is not less than 10cm. , remember not to fold in half.
The fiber is soft and can be bent, but after bending to a certain extent, although the fiber can guide light, it will change the transmission path of light. The transmission mode is converted into a radiation mode so that a part of the light energy penetrates the cladding layer or passes through the cladding layer, and the radiation mode is lost to the outer leakage, thereby generating a loss. When the bending radius is larger than 5-10 cm, the loss caused by the bending is negligible.
Once the pipeline is broken, we need the help of the fiber fusion splicer. Generally speaking, things are broken and need to be repaired, and the fiber has a loss. It is not called repairing the fiber, but welding the fiber.
Therefore, it is normal to bend the fiber within a reasonable range, but the out-of-range bending affects the function of the fiber and is not necessary.