Hybrid wavelength-division and time-division multiplexing passive sensing optical network

Abstract

The invention provides a hybrid wavelength-division and time-division multiplexing passive sensing optical network which comprises optical terminal equipment, a passive optical network and an optical sensing unit, wherein a two-way port of the optical terminal equipment is connected to a two-way port of the passive optical network by an optical fiber, and the passive optical network is also connected with the optical sensing unit. The invention mixes a wavelength-division and time-division multiplexing technology and an optical fiber sensing technology and has large multiplexing volume and wide monitoring range.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensing, in particular to a hybrid wavelength division time division multiplexing passive sensing optical network architecture, a data processing method and an implementation device. Background technique [0002] Since entering the 21st century, with the rapid development of optical communication technology, some of the latest technologies in optical communication have gradually provided a new technology platform for the sensing field. Optical fiber sensing, boosted by the development of optical communication technology, is becoming a hot spot in the field of sensor research. Optical fiber sensor is a new type of sensor developed in the mid-1970s. Compared with other electrical sensors, it uses light instead of electricity as the carrier of sensitive information; it uses optical fiber instead of wire as the medium for transmitting sensitive information. The principle of the optical fiber se...

AI Technical Summary

Problems solved by technology

Fully distributed optical fiber sensing mainly includes backward time-domain reflection technology based on backward Raman scattering and Bury scattering, and multiplexing technology of long-distance Sagnac, Michelson and Mach-Zehnder interferometric sensors. However, these sensing systems have high cost, poor stability and reliability.

Multi-point quasi-distributed optical fiber sensing technologies mainly include time division multiplexing (TDM), wavelength division multiplexing (WDM), and space division multiplexing (SDM), but they are all limited to using these multiplexing technologies to combine multiple sensing The units are connected in series or in parallel to form multi-point quasi-distributed sensing, the multiplexing capacity is very limited, and the monitoring range is small

Images