Design of single-mode optical fiber for low latency used in IoT optical transport networks

Optical Fiber as a transmission medium is now playing a major role in communication industry. A low latency is a vital element for any network design. Optical path optimization is the key to designing a network with low latency. Group delay coefficient is a fiber design variable used to optimize the propagation time. Dimensions, material composition and refractive-index profile, dispersion, and non-linearity of the fiber should be carefully selected to provide a satisfactory design for a given program. In this paper, several refractive index profiles are designed, using the OptiFiber software. Different refractive index profiles with triangular core, exponential core and ring, with exponential core and parabolic ring, and two-segmented core are considered to design SMFs for low latencies transmissions. Among other designed SMFs, two-segmented core fiber with core profile transformation is compared to the commercially available product, whose latency is improved by 0.73% with macro- and micro-bending losses of 3.29592e+2 dB/km and 0.0532336 dB/km, respectively, total dispersion of 16.7981 ps/nm.km, and mode field diameter (MFD) of 11.9422 µm at the wavelength of 1550 nm.