Optical coupling/splitting device two-way optical propagation device and optical transmit-receive system

摘要

the present invention, the joining of the upper branch and the signal of the sub-signal to achieve the same optical disc, and relates to a light joining branches for reducing the loss of the joined upper signal. Groups optical joined branches of the invention, the multi the higher signal output output by joining a plurality of the higher signal to multi-mode, and the sub-signal and the optical joining branch means for outputting branches to single-mode, from the light joining splitter outputs the radio wave to the mode, and the sub-signal into a single-mode propagation is characterized by comprising a two-way light propagation in the light output means for joining the branch unit. ;