Double-window fiber, also known as dual-window fiber, is a type of fiber optic cable designed specifically to support two different wavelengths of light. It is commonly used in applications such as communication networks, video transmission, and data transfer, as well as in sensing and monitoring. Fiber optic cables are the backbone of modern digital infrastructure, enabling high-speed internet, cloud computing, and more by transmitting data as light pulses. While fiber optic technology boasts immense theoretical capacity, its real-world performance is affected by factors like attenuation. A dual fiber system uses two separate fibers: one for transmitting (Tx) and one for receiving (Rx) signals. This configuration is widely adopted in traditional telecom. Most optical fibers have a single fiber core, which is usually located on the fiber axis. be arranged on a ring around the fiber axis or on some 2D grid.
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