The Optical Networking and Communication
Conference & Exhibition

San Diego Convention Center,
San Diego, California, USA

SC102 - WDM in Long-Haul Transmission Systems

Monday, 04 March
08:30 - 12:30

Short Course Level: Beginner


Neal S. Bergano

Short Course Description:

Wavelength division multiplexing (WDM) technology used in long-haul transmission systems has steadily progressed over the past few years. Newly installed state-of-the-art transoceanic length undersea cable systems now have tens of terabit/s maximum capacity, while being flexible enough to have an initial deployed capacity at a fraction of the maximum. The steady capacity growth of these long-haul fiber-optic cable systems has resulted from many improvements in WDM transmission techniques and an increased understanding of WDM optical propagation. Important strides have been made in areas of new single-mode fibers, gain equalization, modulation formats, error correcting codes and coherent transponders that have made possible the demonstration of multi-terabit capacities over transoceanic distances. Next-generation systems and future upgrades of existing systems will benefit from new concepts emerging from system research.

This course will review the important issues regarding the use of WDM in long-haul transmission systems. Included will be an introduction to long-haul undersea cable transmission systems, the amplified transmission line, dispersion/nonlinear management, transmission formats, measures of system performance, forward error correction, the importance of polarization effects, experimental techniques and results, a transmission line design example and future trends including coherent transponders.

Short Course Benefits:

  • Explain the tradeoffs made in the design of an amplifier chain.

  • Summarize the tradeoffs made in the selection of fiber types.

  • Understand Q-factor.

  • Discuss the concept of margin in fiber optic transmission systems.

  • Identify the important polarization effects in long-haul transmission systems.

  • Compare the different methods of performing long-haul transmission experiments.

  • Discuss circulating loop experiments.

  • Discuss the future trends in long-haul transmission systems.

  • Gain insight into the optical propagation of data signals over long distances

Short Course Audience:

This course is intended for the student who wants an understanding of how information is transmitted over long distances using fiber optic transmission lines, with emphasis on undersea cable transmission systems. This includes new entrants into the fiber optic field with an engineering background, engineers with fiber optics exposure, people in the fiber optic telecommunications industry, and fiber optic research and development management.

Instructor Biography:

Neal S. Bergano recently retired from his position as Chief Technology Officer and VP of Research and Development at TE Subsea Communications LLC, Eatontown, NJ (TE SubCom).  Neal received the B.S. degree in electrical engineering from the Polytechnic Institute of New York, New York, and the M.S. degree in electrical engineering and computer science from the Massachusetts Institute of Technology, Cambridge, in 1981 and 1983.    In 1981, he joined the technical staff of Bell Labs’ undersea systems division.  In 1992, he was named a Distinguished Member of the Technical Staff of AT&T Bell Labs, where he became an AT&T Technology Consultant in 1996 and AT&T Technology Leader in 1997.  From 1998 to 2014 he was the Managing Director of the System Research and Network Development at TE SubCom.  He holds 31 U.S. patents in the area of optical fiber transmission systems.  His main research has been devoted to the understanding of how to improve the performance and transmission capacity of long-haul optical fiber systems, including the use of wavelength division multiplexing in optical amplifier based systems.

Mr. Bergano is a Fellow of the IEEE, the OSA, AT&T, and TE Connectivity.  He is a member of the National Academy of Engineering.  He served on the Board of Directors for the OSA from 2009 to 2011, and served on the Board of Governors for the IEEE Lasers and Electro-Optics Society from 1999 to 2001.  He is a long-time volunteer and supporter of the OFC/NFOEC meeting, which includes General Chair and Technical Chair in 1999 and 1997, Chair of the steering committee from 2000 to 2002, and Chair of OFC/NFOEC’s long-range planning committee from 2003 to 2017.  He is the recipient of the 2002 John Tyndall Award, for outstanding technical contributions to and technical leadership in the advancement of global undersea fiber-optic communication systems.

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