Why is the anti-interference ability of active optical cable so good?
Publish Time: 2025-02-11
The anti-interference ability of active optical cable is excellent mainly due to the inherent advantages of optical communication technology and the design features of active optical cable.1. Inherent advantages of optical communicationElectromagnetic isolation: optical signals are transmitted in the form of photons, which are not charged and therefore will not be interfered by electromagnetic waves. Compared with electrical signals transmitted in traditional cables, optical signals are almost unaffected by electromagnetic interference (EMI) and radio frequency interference (RFI).Low attenuation: The transmission attenuation of optical signals in optical fibers is very low, especially in short-distance transmission. The signal quality will hardly deteriorate due to the transmission distance, which also reduces the possibility of signal distortion.2. Optical fiber material characteristicsInsulation: Optical fibers are usually made of glass or plastic, which have good insulation and are not conductive, so they will not be distorted or interrupted due to the influence of external electric or magnetic fields.Corrosion resistance: Optical fiber materials have strong corrosion resistance, can maintain stable performance in harsh environments, and are not easily affected by environmental changes.3. Design features of active optical cablePhotoelectric conversion: Active optical cable is usually equipped with a laser transmitter (transmitter) and a photodetector (receiver) at both ends. These devices convert electrical signals into optical signals and convert optical signals back to electrical signals at the receiving end. This photoelectric conversion process effectively isolates electromagnetic interference and ensures the purity of the signal.Miniaturization and high integration: The optical module inside the active optical cable is designed with high integration to reduce the possibility of external interference. At the same time, the diameter of the optical fiber itself is very small, which further reduces the contact area of external interference.4. Engineering implementation of anti-interference designShielding design: Although the optical fiber itself does not need to be shielded, in the design of active optical cable, in order to further protect the optical module and circuit part, many AOC products will also add a metal shielding layer to the outside to prevent the influence of external electromagnetic interference on the circuit part.Temperature and vibration stability: The optical module of active optical cable is usually subjected to strict thermal stability and vibration tests to ensure stable performance under various environmental conditions (such as high temperature, low temperature, vibration, etc.), thereby further enhancing its anti-interference ability.5. Digital characteristics of optical signalsHigh bandwidth and low bit error rate: Optical communication systems can support extremely high bandwidth, and the digital characteristics of optical signals make the bit error rate of signal transmission extremely low. Digital signals are usually more resistant to interference than analog signals, because digital signals can effectively recover interfered signals through error correction codes and other methods.6. Application scenario requirementsHigh-speed data transmission requirements: Active optical cables are widely used in data centers, high-performance computing (HPC), video transmission and other fields, which have extremely high requirements for data transmission stability and anti-interference capabilities. In order to meet these requirements, active optical cables are designed and manufactured with special attention to the optimization of anti-interference capabilities.The excellent anti-interference capability of active optical cables is mainly due to the electromagnetic isolation of optical communication technology, the insulation and corrosion resistance of optical fiber materials, and the natural isolation of external interference during photoelectric conversion. In addition, the design and engineering implementation of active optical cables further enhance their stability and reliability in complex environments.
