Optical Cross-Connect (OXC) Fundamentals
An optical cross-connect (OXC) is a network device that switches high‐speed optical signals between fiber inputs and outputs without converting them to electronics. In essence, an OXC uses photonic switching fabric to route wavelength channels from any incoming fiber to any outgoing fiber, typically by demultiplexing each WDM signal into individual wavelengths, directing them through a switch matrix, and then re-multiplexing onto output fibers. Because the signals remain in the optical domain (“transparent” switching), OXCs preserve data‐rate and protocol transparency. Because the signals remain in the optical domain (“transparent” switching), OXCs preserve data‐rate and protocol transparency. This all‐optical routing is controlled electronically (often via an SDN controller) to dynamically allocate bandwidth and restore paths without manual patching.