WDM Terabit Speeds in Glass Fibers, Principles of WDM

							COMMUNICATIONS TEST & MEASUREMENT SOLUTIONS

WDM – Terabit Speeds in Glass Fibers – Principles of WDM Networks
The demand in modern telecommunications is for ever greater transmission bandwidths. However, if an optical fiber is used to transmit at a single wavelength only, the bandwidth is limited due to the effects of chromatic dispersion. The bandwidth can be increased enormously by using the fiber to transmit signals at several wavelengths simultaneously using the technique called WDM (Wavelength Division Multiplexing). The challenges faced can be widely different: In metro networks, for example, using coarse WDM, lots of protocol transparent channels need to be switched flexibly, whereas the main focus in WANs, using dense WDM, is on repeater-free paths that are as long as possible. Knowledge of the structure and functional principles is just as important as understanding the components when it comes to realizing and monitoring WDM systems. The quantities that need to be measured during operation are introduced and discussed in this seminar. Above all, the high optical power levels that occur when several channels are transmitted simultaneously, lead to previously unknown problems with optical fibers. The new components and measurements needed as a result are also introduced. The low bit error rates demanded by WDM networks take an extremely long time to measure accurately. The new method of measuring the Q factor is a much faster way of determining the bit error rate accurately. The seminar is rounded off by a preview of future developments in so-called all optical networks (AON), where the usual conversion from optical to electrical signals is no longer required.
Participants will learn how WDM telecommunications works and will be able to make practical use of measurement techniques on these systems. They will also learn about what needs to be considered during planning and acceptance testing of WDM networks. Target group Engineers and technicians concerned with installation, operation and planning WDM communications systems. Prerequisites In-depth knowledge of optical telecommunications or the contents of the seminar “Fiber Optics Technology and Measurement Methods” Related seminars ► Getting in “Fiber Optics – Principles and Measurements” ► Continuation seminar “G. 709 Optical Transport Networks OTN” ► Workshop “ONT-30 and OSA-155 Workshop” Seminar info ► Ordering information GE303011OS ► Duration 2 days from 9.00 to 16.30 h ► Date, location and price on request or see under www.jdsu.com/training ► On-site or customized seminars and E-Learning on request Contact Fax +49 7121 86 2145 Tel +49 7121 86 1657 seminars.europe@jdsu.com For more information, see your local country training site on www.jdsu.com/training

► Structure and function of WDM systems ► Dispersion management ► Generating and measuring high optical power levels ► Special active and passive components for WDM transmission technology ► WDM standards ► WDM system measurement quantities ► Chromatic (CD) and polarization mode dispersion (PMD) ► Non-linear effects in glass fibers ► Transmission using solitons ► All optical networks (AON) ► Measuring the Q factor
Equipment discussed

►Optical spectrum analyzers (OSA) ► Dispersion measurements (CD and PMD) ► Q factor measurements ► Optical power level measurements

JDSU European Training Center

Transport Networks

Contents

Course objectives