Full monitoring for Long-Reach TWDM Passive Optical Networks based on TRA technique

• Long-Reach Passive Optical Networks (LR-PONs) consolidates of metropolitan and access networks by extending the distance between the Central Office (CO) and the end users, which in turn simplifies the network and potentially brings cost savings. With the explosively growing of data traffic, Time and Wavelength Division Multiplexing (TWDM) technology have also been employed in LR-PON to realize high capacity. However, due to high capacity and large coverage, the presence of a single failure may cause a huge loss of data and affect a large number of subscribers in LR-PON. Efficient network fault monitoring therefore becomes a key to improve the level of network reliability. In this paper, we report an advanced solution realizing fault detection, identification and localization in both feeder and distribution fiber segments of TWDM LR-PON. Instead of using the conventional optical time domain reflectometry (OTDR) approach, we implement multi wavelength Transmission-Reflection Analysis (nλ-TRA) as the monitoring technique, which is able to provide a good spatial accuracy and a high detection speed without interfering with the data traffic. Theoretical analysis and experimental validation demonstrate that the proposed scheme is capable of providing an accurate fault monitoring functionality.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)

Nyckelord

fault detection and localization

fiber optics communications

long reach passive optical networks

Rayleigh scattering

Fault detection

Optical communication

Optical fiber communication

Passive networks

Time domain analysis

Transparent optical networks

Wavelength division multiplexing

Experimental validations

Fiber optics communication

Long reach passive optical networks (LR PONs)

Long-reach passive optical networks

Monitoring techniques

Multi-wavelength transmission

Optical time domain reflectometry

Passive optical networks

Publikations- och innehållstyp

ref (ämneskategori)

kon (ämneskategori)