Multi-core fiber couplers (MCFC) provide access to individual cores with negligible optical loss and without an additional Fan-in/Fan-out (FIFO). Side-polished SMF and MCF are mated for an efficient evanescent mode coupling between two optical cores (Please also see the side-polished fiber). The side-polishing method allows the geometric dimensions of the multi-cores unperturbed. This unique approach makes it possible to realize various functions that ordinary directional couplers provide such as WDM, tap and variable-ratio couplers.
• Direct coupling to individual cores in uninterrupted MCF
• FIFO-less coupling to selective cores
• Negligible optical loss
• All-fiber-optic construction
• Compact size
• MCF variable-ratio couplers
• MCF fixed-ratio couplers
• MCF tap couplers
• MCF WDM couplers (Pump combiner)
• MCF Fan-in/Fan-out (FIFO)