Optical Path Issues and Solutions for Optical Transmission Equipment

In security surveillance projects, optical cables are mostly laid by users themselves, typically G652 single-mode fiber. Since the system coverage is generally not large, the optical link loss margin of standard (≤20KM) equipment is ample. Therefore, optical transmission equipment does not have excessive requirements for optical path loss. However, users often encounter issues such as no image, image flickering, or poor image quality. In most cases, these problems originate from the pigtails, patch cords, or adapters at both ends of the optical path, and are rarely related to the main optical cable.

Common issues include:

1. Incorrect insertion of fiber optic connectors;

2. Contamination of the ferrule (ceramic tube) in fiber optic connectors.

Solutions are:

1. Re-insert the connectors or replace the fiber patch cords;

2. Clean the plug and receptacle ferrules with 99.9% anhydrous ethanol;

3. Use a multimeter to check the camera video cable to determine whether a video signal is present.