Ultra-Dense Wavelength Division Multiplexing Passive Optical Network Based on Whole Network Wavelength Synchronization

Abstract

The invention discloses an ultra dense wavelength division multiplexing passive optical network based on full network wavelength synchronization, which comprises an optical line terminal and an optical network node, wherein the optical line terminal comprises a datum wavelength generating unit, a downlink data transmission unit, an uplink data transmission unit, a first user side and an optical circulator; and the optical network node comprises five optical couplers, three third optical circulators, two third distributed feedback lasers, a phase discriminator, a first photoelectric detector, a second photoelectric detector, a second user side and a user identification code detection unit. By adopting the full network wavelength synchronization mode, dense wavelengths are used to distinguishing channels, complex and high-power switching can be avoided, and green, efficient and high-speed broadband access service is provided for end-users. A nonlinear medium is used to carry out nonlinear spectrum broadening on a comb spectrum generated by a mode-locked laser, and generation of an ultra continuous spectrum is realized. The wavelength datum quality and the bandwidth are ensured, and the user signals can have a high discrimination at a tiny wavelength interval.

Description

technical field [0001] The invention relates to an ultra-dense wavelength division multiplexing passive optical network (UDWDM-PON), in particular to a UDWDM-PON technology with wavelength synchronization of the whole network. Background technique [0002] With the rapid growth of data volume and network scale, there is an urgent requirement for large-scale, high-performance, and low-energy access network technology, making it a research hotspot in the field of communication. Ultra Dense Wavelength Division Multiplexing Passive Optical Network (UDWDM-PON) has attracted much attention due to its advantages in realizing large-scale access networks. Taking into account the specific national conditions of our country, the research of large-scale access network technology has more important significance to the development of our country's national economy and science and technology. [0003] The current access network is basically based on a time-division multiplexing-based shar...

AI Technical Summary

Problems solved by technology

However, due to the limited number of wavelengths, the traditional DWDM-PON is still difficult to be directly used in large-scale access networks, and the cost is relatively high

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