کابل Optical Ground Wire که به اختصار به آن OPGW می گویند، سیم محافظ هوایی حاوی فیبر نوری است. تعداد معینی تار فیبر نوری در این سیم داخل یک یا چند تیوب آلومینیومی یا فولاد ضد زنگ (Stainless Steel) قرار دارد.
The Optical Ground Wire, cable is used in energy transmission lines to protect the phase wire against instantaneous lightning currents at the highest point of the tower and transmits transient currents to the ground through the earth wire of the tower. Another important task of this wire is the transmission of audio and video data using optical fibers.
The number of optical fibers used in the tubes is variable and based on the needs and requests of the customer, it can start from 1 fiber and reach numbers such as 48, 24, 12 and even higher. OPGW cables are used at the highest point of transmission line masts. Single-mode and multi-mode fibers can be used in the production and design of OPGW cables. Single-mode fibers are used in distances higher than one kilometer with high bandwidth and multi-mode fibers are used in distances less than one kilometer with lower bandwidth.
There are two main types of single-mode optical fibers. The first model, which is the older generation, is known as SMF. The optimal performance of SMF is in the bandwidth of 1310 and the spectrum of 1550 (bandwidth between 1565 and 1625) nm. It has less dispersion in the 1310 nm bandwidth. This cable is used for long routes, big cities, cable television, intelligent traffic control and communication.
The more advanced generation is NZDSF, which is designed for DWDM equipment. This generation in the bandwidth between 1530 and 1625 nm has much less dispersion compared to SMF.
Pooya Power Company, as the only producer of aluminum coated steel core in the country (the coil used in OPGW wire) is able to produce this wire in different sizes and with different number of strands and according to the customer’s needs in the shortest possible time and with Produce the highest quality.