G654:Ultra low loss optical fiber, mainly used for transoceanic optical cable. The common core is pure SiO2,while the ordinary ones need to be doped with germanium. The loss near 1550nm is minimum, only 0. 185dB/km, the dispersion is relatively large,a bout 17~20 ps/ (nm·km), But the dispersion is. In recent years, a new type of G. 654 fibre In the mid-1980s, in. As a leading fiber optic manufacturer with 21 years of experience, GL FIBER specializes in producing high-performance G. C, for long-haul and high-speed networks. Below, we explain the technical differences between these two fiber types to help you choose the. In the mid-1980s, in order to meet the demand for long-distance communication in submarine cables, a single-mode fiber with a pure quartz core was developed for use at 1550 nm wavelength, and its attenuation near that wavelength was more than 10% lower than that of G. This fiber was. The superior attributes of TXF ® optical fiber, compliant to ITU-T G. E, allow for the provision of an additional network margin that can be leveraged to enable reliable, high-data-rate transmissions over longer spans and extended reach. To support these high capacity systems in terrestrial backbone networks, low attenuation and large core area fibers compliant with Recommendation ITU-T G 654.