In Hunan GL optical cable, the optical signal is transmitted along the fiber refracted wall. Optical fiber transmission has many advantages, such as high sensitivity and no interference from noise; small size, light-weight, long life, and low price; insulation, high pressure, high temperature, corrosion, suitable for special environments; can be adjusted according to environmental requirements Easy signal transmission; high bandwidth, reduced communication volume, long distance; small crosstalk, high quality; high confidentiality; easy to lay and move raw materials.
According to relevant research, it is found that the speed of light in quartz glass fiber is 31% lower than that in a vacuum, and there are problems of transmission delay and signal attenuation. New optical fibers have made breakthroughs in this regard.
In the optical fiber communication system, the most basic mode is optical transceiver–optical fiber —- optical transceiver, so the main body that affects the transmission distance is the optical transceiver and optical fiber. There are four factors that determine the optical fiber transmission distance, which are optical power, dispersion, loss, and receiver sensitivity. Optical fiber can not only be used to transmit analog and digital signals, but also meet the needs of video transmission.
The greater the power coupled into the fiber, the longer the transmission distance.
In terms of dispersion, the larger the dispersion, the more severe the waveform distortion. As the transmission distance becomes longer, the waveform distortion becomes more serious. In digital communication systems, waveform distortion will cause inter-symbol interference, reduce the light-receiving sensitivity, and affect the system’s relay distance.
Including the loss of optical fiber connectors and fusion loss, mainly loss per kilometer. The smaller the loss per kilometer, the smaller the loss and the longer the transmission distance.
The higher the sensitivity, the smaller the received optical power and the longer the distance.