2 results about "OTN Systems" patented technology

The invention discloses a multidimensional communication sensing system integrating an optical transmission network and BOTDR / DAS distributed sensing, and relates to the technical field of optical fiber communication and optical fiber sensing. The system comprises an OTN transmission subsystem, an optical fiber link and a BOTDR / DAS fusion sensing subsystem. Wherein the OTN transmission subsystem is used for realizing high-capacity data transmission through an optical fiber link; and the BOTDR / DAS fusion sensing subsystem is used for realizing strain, temperature and vibration distributed measurement of an optical fiber link through a Brillouin scattering and Rayleigh backscattering mechanism. According to the system, a double-self-heterodyne demodulation architecture and a reverse wavelength division multiplexing mechanism are adopted, cooperative demodulation and high-isolation transmission of BOTDR and DAS signals are achieved under the common-fiber condition, and high-speed communication and distributed temperature, strain and vibration synchronous monitoring within the 100 km range can be achieved. According to the method, a technical foundation can be laid for realizing physical layer intelligentization of the in-service power OTN.

This invention discloses a closed-loop quantum co-fiber transmitting and receiving device, method, and transmission system, relating to the field of optical communication technology. The closed-loop quantum co-fiber transmitting device includes a quantum signal multiplexing unit and N-1 classical signal multiplexing units. In the N-1 classical signal multiplexing units, the first classical signal multiplexing unit multiplexes any two input classical optical signals of different wavelengths and outputs the result to the next classical signal multiplexing unit, which then multiplexes the signal with another classical optical signal of a different wavelength. This process continues until the last classical signal multiplexing unit multiplexes the signal with the last classical optical signal of a different wavelength, after which the multiplexed classical optical signal is output to the quantum signal multiplexing unit. The quantum signal multiplexing unit then multiplexes the input classical optical signal with the quantum optical signal and outputs the result. This invention enables quantum co-fiber transmission compatible with multi-band optical communication systems (such as OTN systems), meeting practical application requirements.