JDP_V4_N4_RevP1 Anshu Sharad Mohan Shrivastava Vikas Sahu Aakash Joshi Anamika Bhadra Anjali S. Sanghvi Nirmala Tirkey Journal on Digital Signal Processing 2322–0368 4 4 35 46 SDM (Space Division Multiplexing), MCF (Multi-Core Fiber), FMF (Few Mode Fiber), DMD (Differential Mode Delay), (IC-XT) Inter-Core Crosstalk This paper aims to make understand the fundamentals and recent advancement in Multi-core Fiber Technology using Space Division Multiplexing. Few Mode Multi-core Fiber (FM-MCF) that enable Space Division Multiplexing (SDM) have greater potential to improve the transmission capacity compared to Single Spatial Mode Fiber (SSMF). The concept of Heterogeneous Few Mode Multi-core Fibers has paved its way in optical communication system by replacing Homogeneous Few Mode Multi-core Fibers which were previously opted. The uncoupled Multi-core Fibers (MCFs) which can utilize multiple cores are arranged in a fiber as spatial transmission channels and then is used for the SDM transmission. Design of 36 core and 3 mode is also demonstrated. Measurement of Inter-core XT for different bending radius is studied. And to give the readers a glimpse of recent development in Multi-core Fiber (MCF) technology, some noticeable research papers have also been discussed. System implementations based on MCF are mentioned along with future research directions. October - December 2016 Copyright © 2016 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=8315