This single-mode low loss and bend improved fiber utilized in optical fiber cable shall meet ITU G. 657 (Table A1), Telcordia GR-20-CORE, IEC 60793-2-50 (B-652. This document outlines the specifications for a single-mode optical fiber and cable designed for use around the 1310 nm zero-dispersion wavelength, suitable for both the 1310 nm and 1550 nm regions, and compatible with analogue and digital transmission. The core of the fiber is made of a highly transparent material, which allows the light to travel through it with minimal attenuation or loss of signal. 5 This non-zero dispersion-shifted single-mode fiber utilized in the. This comprehensive guide explores Single-Mode Fiber Optic Cable, covering technical specifications, deployment scenarios, and best practices to help you optimize your fiber infrastructure for maximum performance and reliability. What Is Single-Mode Fiber Optic Cable? Single-mode fiber optic cable. ITU-T and IEC have implemented multiple changes to their respective documents regarding Single Mode Fiber (SMF) since the last IEEE document was published. ” The information contained in this document is valid and correct at the time of issue.