1. The average optical power of the transmitter output coupled into the fiber. The greater the power coupled into the fiber, the longer the extended distance.

  2. The dispersion of the fiber, if the dispersion of the fiber is large, the waveform distortion after a certain distance transmission will be serious. The longer the transmission distance, the more severe the waveform distortion. In digital video systems, waveform distortion will cause inter-symbol interference, reduce the sensitivity of light receiving, and affect the extended distance of the system.

3. fiber loss. The loss of the optical fiber line includes the loss of the optical fiber active connector and the splicing loss of the optical fiber, of course, the main loss per kilometer of the optical fiber. If the loss per kilometer of the optical fiber is smaller, the loss of the signal optical power on the optical fiber is smaller, and the transmission distance of the optical signal in the optical fiber is farther.

4. Optical receiver sensitivity that meets certain bit error rate requirements. The higher the receiving sensitivity, the smaller the low received optical power that meets the system bit error rate requirement, and the longer the extended distance.

　　标签：光纤延长器