Double Optical Multiplexer/Demultiplexer to convert M0 to M2 or vice versa. In multiplex mode, it combines two optical wavelengths, 1510 nm and 1550 nm, onto a single fiber. In demultiplex mode, it splits one fiber into the two wavelengths. The device is designed to support flexible wavelength routing for optical links and is compatible with related units such as BFL-T2, BFL-R2, MATF, and PFL in a system.