What is the bending angle limit of optical fiber?

　　Fiber bending angle limits vary by fiber type. Here is a detailed analysis of fiber bending angle limits:

　　First, the bending angle limit of single-mode fiber

　　Maximum bending angle: The maximum bending angle of single-mode fiber is usually no more than 1.5 degrees. This is because the light inside a single-mode fiber has only one path to travel, making it more sensitive to bending angles.

　　Impact: Beyond this angle range, the optical signal may be severely damaged and even unable to work properly. Optical signal loss will reduce the strength of the signal received by the receiver, thereby reducing the quality of communication.

　　Second, the bending angle limit of multimode fiber

　　Maximum bending angle: The maximum bending angle of multimode fiber is usually no more than 3 degrees. Multimode fiber has a large core diameter, which can propagate multiple modes of optical signals at the same time, and has a relatively high tolerance for bending angles, but still needs to follow certain bending angle restrictions.

　　Impact: Beyond this angle range, optical signal loss and distortion may also result.

　　III. Other precautions for fiber bending

　　Bending radius: In addition to the bending angle, the bending radius of an optical fiber is also a key factor affecting its tranSMission performance. Generally speaking, the bending radius of an optical fiber should be greater than or equal to a certain value (such as 25mm or several times the diameter of the fiber) to avoid external noise and fiber transmission performance degradation due to too narrow bending.

　　Installation method: When installing the fiber, be careful not to bend too much to avoid fiber breakage. Breaking will not only cause communication interruptions, but also increase maintenance costs and time.

　　In summary, in order to ensure the normal transmission and operation of the optical fiber, it is necessary to strictly abide by the limitations of its bending angle and bending radius. In practical applications, excessive bending of the optical fiber should be avoided as much as possible, and special attention should be paid to the maximum angle and minimum radius generated when the optical fiber is bent to ensure the good operation and transmission performance of the optical fiber.