OLT (Optical Line Termination) optical module integrated with OTDR (Optical Time Domain Reflectometer) monitoring function

The invention discloses an OLT (Optical Line Termination) optical module. The OLT optical module comprises an optical device, a PON (Passive Optical Network) data signal driver, a PON data signal limiting amplifier and an OTDR (Optical Time Domain Reflectometer) data processing module, wherein the optical device comprises WDM (Wavelength Division Multiplexing) which is dual-waveband WDM. By the invention, the cabling structure of a network can be simplified. Compared with the traditional network, the invention decreases OTDR equipment and WDM, reduces cabling cost and network cost of a PON system, and also lowers equipment and control complexity.