At which wavelengths does the attenuation of double frp self-supporting optical cable perform best?
Publish Time: 2025-02-08
In modern communication networks, optical cables are the main carriers of information transmission, and their performance is directly related to the quality and efficiency of communication. Double FRP (glass fiber reinforced plastic) self-supporting optical cables have been widely used in overhead laying, long-distance communication, and environments requiring high reliability and durability due to their unique structure and excellent performance.Double frp self-supporting optical cable uses double-layer FRP material as a reinforcing element, which not only improves the mechanical strength of the optical cable, but also gives it good lateral pressure resistance and weather resistance. This optical cable has a compact structure and light weight, making it very suitable for use in harsh environments, such as mountainous areas, rivers, highways and other areas where it is difficult to lay traditional pipelines. At the same time, the self-supporting design reduces the dependence on external support structures and reduces construction costs and time.1. Attenuation: a key indicator of optical cable performanceAttenuation is one of the important indicators for measuring the transmission performance of optical cables. It reflects the energy loss of optical signals during transmission in optical cables. The smaller the attenuation, the longer the transmission distance of the optical signal and the higher the communication quality. The attenuation of optical cables is affected by many factors, including the characteristics of the optical fiber itself, the structural design of the optical cable, and external environmental conditions.2. Attenuation performance of double frp self-supporting optical cableThe attenuation performance of double frp self-supporting optical cable at different wavelengths has its own characteristics. Generally, optical fiber communication mainly uses three wavelength ranges: 850nm, 1300nm to 1310nm, and 1550nm.850nm wavelength: At this wavelength, the attenuation of double frp self-supporting optical cable is relatively high, usually greater than or equal to 3.0dB/km. This is mainly because the 850nm wavelength is close to the cutoff wavelength of multimode optical fiber, and there are many transmission modes of optical signals in the optical fiber, and the interference between them leads to increased attenuation.1300nm to 1310nm wavelength: In this wavelength range, the attenuation of double frp self-supporting optical cable is significantly reduced. Especially at the 1310nm wavelength, the attenuation is usually less than or equal to 0.36dB/km. This is because at this wavelength, the dispersion of the optical fiber is small, and the optical signal can be transmitted in a relatively stable state, thereby reducing attenuation.1550nm wavelength: At 1550nm wavelength, the attenuation performance of double frp self-supporting optical cable is optimal, usually less than or equal to 0.22dB/km (sometimes 0.23dB/km, depending on the manufacturing process and materials of the optical cable). The low attenuation characteristics at this wavelength give double frp self-supporting optical cable a significant advantage in long-distance communication and high-speed data transmission.4. Wavelength selection and application scenariosIn practical applications, choosing the right wavelength is crucial to optimizing the performance of optical cables. For short-distance communication or LAN applications, the 850nm wavelength may be more suitable. Although its attenuation is relatively high, it can be compensated by adding optical amplifiers or adopting higher-level modulation technology. However, for long-distance communication or application scenarios that require high transmission rates and long-distance transmission, 1310nm and 1550nm wavelengths are better choices.In summary, double FRP self-supporting optical cable exhibits optimal attenuation characteristics at 1310nm and 1550nm wavelengths. The low attenuation at these wavelengths not only improves the transmission efficiency and distance of optical signals, but also provides a strong guarantee for high-speed and large-capacity data transmission in modern communication networks.
