DIAMOND’S FBG NETWORK MONITORING SYSTEM THE NETWORK MONITORING SYSTEM 1. The FBG reflectors are integrated into the fiber-optic line, to which a unique code is assigned. 2. A simple instrument (the interrogator) is used to read the code, identify the line and correct any possible installation errors. 3. The code is assigned to a line and the network information is entered into a database for future network management. The FBG components can be integrated into the fiber-optic line at any point between the Central Office (CO) and the Optical Termination Outlet (OTO), as a wide range of codes are permitted. Network stability and high levels of network productivity are the preconditions necessary for achiev- ing economic success in the operation of all networks. The aim in so doing is to guarantee a high level of resilience against network outages, and if outages do occur, to ensure a quick detection and rapid troubleshooting process. In its position as a global market leader in fiber-optic connection technologies, DIAMOND has developed a new network monitoring system which is based on Fiber Bragg Grating (FBG) technology. . . . ensuring increased network stability and productivity TECHNOLOGIES INVOLVED A Fiber Bragg Grating (FBG) is a Bragg reflector, which is written onto the fiber core at regular intervals. These reflect specific light wavelengths and relay all others. A sequence of Bragg Gratings can be used as an optical line filter in order to provide a unique Optical Line Identification (OLID) code. The OLID Code works with different wavelengths to those used for data transmission. This means that there is no interference with user data in either direction. FBG components also create an additional irrelevant insertion loss for the data transmission wave- lengths in the fiber-optic line. The interrogator is a simple device which is used to read the OLID code. Input light Reflected light Transmitted light DIAMOND SA Via dei Patrizi 5 • CH-6616 Losone • Tel. +41 91 785 45 45 • Fax +41 91 785 45 00 • [email protected] www.diamond-fo.com