Two-stage splitting in the FTTH network refers to a cascaded optical splitter between the OLT and the ONU, which has a basic form of "OLT → Optical Splitter 1 → Optical Splitter 2 → ONU". By dividing a single optical signal from a central Optical Line Terminal (OLT) into multiple outputs for Optical Network Terminals (ONTs) at users' homes, splitters eliminate the need for dedicated fibers to each residence—slashing infrastructure costs while scaling network reach. In the application of primary splitter, the optical splitter can be installed in the. Based on passive optical networking technology, Fiber-to-Home (FTTH) access network is a point-to-multipoint network structure, which utilizes optical splitters to transmit central station signals to multiple end-users. Conversely, it can also combine multiple signals into one.
[PDF Version]