The Optical Networking and Communication
Conference & Exhibition

Los Angeles Convention Center,
Los Angeles, California, USA

Short Courses

SC341 - Multi-carrier modulation: DMT,OFDM and Superchannels

Sunday, 19 March
13:00 - 17:00

Short Course Level: Intermediate


Sander L. Jansen¹, Dirk van den Borne²; ¹ADVA Optical Networking, USA ²Juniper Networks, Germany

Short Course Description:

In this short course we will discuss the ins and outs of optical OFDM and DMT for next-generation optical transmission systems. The course will describe the principles of OFDM, and in detail explains the signal processing algorithms that are required for generation and detection of an OFDM signal. We describe the most relevant transmitter and receiver architectures to generate and detect an optical OFDM signal (both analogue and digital). In addition, optical OFDM implementation aspects such as the compensation of transmitter and receiver imperfections are addressed and the digital signal processing complexity trade-offs in various flavors of OFDM are explained. Special focus is placed on DMT, a simplified form of OFDM, which recently has gained popularity for short distance applications such as client interfaces.
The course includes a strong focus on the different application scenarios of OFDM, ranging from access applications and next-generation client interfaces to ultra-long haul transport. In particular, we discuss in detail on the role that OFDM can play in next-generation 400G/1T transport networks and explain the differences in signal processing between OFDM and single-carrier modulation. The role of DMT in next-generation client interfaces for short reach and datacenter applications is discussed extensively as well.
The course should enable attendees to understand the different concepts and implementations of optical OFDM and their application scenarios in different types of optical networks, including appreciating the role that OFDM can play in optimizing the capacity of next-generation optical transport networks.

Short Course Benefits:

This course should enable you to:

  • Describe the concept of orthogonal frequency division multiplexing (OFDM) and implementations such as discrete multi-tone (DMT).

  • List different flavors of optical OFDM and detail the advantages and disadvantages of each method to generate an OFDM signal.

  • Appreciate the design trade-offs of the cyclic prefix, FFT-size, etc. with respect to for instance the dispersion tolerance and oversampling.

  • Explain the multi-input, multi-output (MIMO) technique that is required to equalize a polarization division multiplexed (PDM) or a mode division multiplexed signal.

  • Describe concepts such as IQ imbalance mitigation and phase noise compensation.

  • Illustrate the advantage that OFDM can bring in the generation of super channels for next-generation 400G/1T transport networks.

  • Understand the different implementation of ODFM and DMT for access and data center applications, and appreciate the relative complexity of the transmitter and receiver architecture.

  • Explain the influence of fiber nonlinearity on OFDM and describe methods to optimize the nonlinear tolerance of optical OFDM.

Short Course Audience:

This course is intended for engineers, researchers and technical managers who like to gain a better understanding of optical OFDM and its applications in next-generation optical transport networks. Apart from the theory and concepts behind optical OFDM, the implementation and system design will be discussed in detail, such that the participants can obtain a good level of understanding for the different design trade-offs. Participants should have a comprehensive knowledge in the field of fiber-optic transmission systems; no previous knowledge of OFDM is required. Past attendees of the course will find substantial updates and new information, and they are encouraged to attend again.

Instructor Biography:

Sander L. Jansen received his Ph.D. degree (with highest honors) in EE from the Eindhoven, University of Technology. Subsequently, Dr. Jansen worked as a post-doc at KDDI R&D Laboratories in Japan where he specialized in optical orthogonal frequency division multiplexing (OFDM), a broadband multi-carrier modulation method, for long-haul transmission systems. Whereas OFDM is a common modulation format in wireless communication systems it was at the time of his post-doc new for the optical communication community. From 2008 to 2012 he was project manager at Nokia Siemens Networks in Germany. In this position he was responsible for the specification, technical evaluation and selection of optical components. In addition he investigated and evaluated modulation formats for next generation 100GbE transmission systems and was responsible for forward looking topics in collaboration with several universities. Currently, Dr. Jansen is Director of Product Line Management at ADVA Optical Networking, Germany.
Dr. Jansen authored and co-authored 10+ patents, one book chapter and more than 100 refereed papers and conference contributions. He is an associate editor for the PTL and has served as a committee member on various conferences. He has received several awards including the Young Investigator award from the IEEE Photonics Society “for pioneering contributions in optical OFDM for fiber-optic transmission systems”.
Dirk van den Borne received the M.Sc. and Ph.D. degrees in electric engineering from the Eindhoven University of Technology, The Netherlands, in 2004 and 2008, respectively. During his Ph.D. research he focused on improvements in long-haul transmission systems using robust optical modulation formats and electronic impairment mitigation. As part of his Ph.D. studies he succeeded in the first-ever demonstration of 100G modulation and detection with coherent detection and digital signal processing, now the established industry standard for 100G transport. In 2008 he joined Nokia Siemens Networks, working as an R&D program manager responsible for the optical system performance of the DWDM portfolio. In 2012 he joined Juniper Networks, where he is now a solution architect and director for IP-optical architecture. In this responsibility he works with service providers worldwide on their network evolution strategy for IP-Optical convergence.
He has spoken frequently at major industry events, authored and co-authored more than 100 peer-reviewed papers and conference contributions and holds several patents on optical communication. He is an associate editor for the PTL and has previously served on several technical program committees for both IEEE and OSA. He has received several awards including the telecommunication award from the royal Dutch engineering society (KIVI-NIRIA). 

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