Space division multiplexing technology: Principles, applications, and future prospects

As demand for fiber-optic communication capacity grows, traditional multiplexing technologies struggle to keep pace, prompting the rise of Optical Space Division Multiplexing (OSDM). By utilizing the spatial dimension of fibers like multi-core and few-mode fibers, OSDM enables parallel data transmission across independent channels. This paper explores its principles and applications in high-capacity networks, mobile backhaul, and microwave photonics. OSDM offers significant advantages, including enhanced transmission capacity and improved energy efficiency over conventional methods like wavelength and time division multiplexing. However, it faces challenges such as high manufacturing costs and complex crosstalk management. Despite these drawbacks, OSDMs scalability and potential for integration with intelligent systems position it as a key technology for future optical communication networks.