Patent ID: 7556439

Claim:
A bi-directional optical assembly applied in a full duplex optical communication using a single optical fiber, comprising: a first transmitting optical subassembly for emitting light with a first wavelength to the single optical fiber; a second transmitting optical subassembly for emitting light with a second wavelength different from the first wavelength to the single optical fiber; a receiving optical subassembly for receiving light with a third wavelength different from the first and second wavelengths from the single optical fiber; a first wavelength division multiplex filter arranged between the first and second transmitting optical subassemblies, the first wavelength division multiplex filter reflecting the light with the first wavelength and transmitting the light with the second wavelength; a second wavelength division multiplex filter arranged between the single optical fiber and the receiving optical subassembly, the second wavelength division multiplex filter transmitting the light with the first and second wavelengths and reflecting the light with the third wavelength; an isolator provided between the first and second wavelength division multiplex filters, the isolator transmitting light propagating from the first wavelength division multiplex filter to the second wavelength division multiplex filter and cutting light propagating from the second wavelength division multiplex filter to the first wavelength division multiplex filter; a sleeve assembly configured to secure the single optical fiber; and a housing configured to install the first and second wavelength division multiplex filters and the isolator, and to secure the first transmitting optical subassembly, the receiving optical subassembly and the sleeve assembly.