• Technical Conference:  30 March – 03 April 2025
  • Exhibition: 01 – 03 April 2025
  • Moscone Center, San Francisco, California, USA

SC408 - Space Division Multiplexing for Optical Communication Systems and Networks

Sunday, 24 March
13:00 - 16:00 (Pacific Time (US & Canada), UTC - 08:00)

Short Course Level: Advanced Beginner


Roland Ryf, Nokia Bell Labs, USA

Short Course Description:

The transmission capacity required by modern fiber-optic communication systems often significantly exceeds the capacity of a single fiber, therefore requiring new cost effective fibers and components to support massive parallel optical paths (space-division multiplexing).

Additionally, traditional wavelength-division multiplexing (WDM) based network architectures scale poorly for large numbers of spatial paths and new scalable and cost effective network architectures are required.

In the first part of short course we will address various options to implement massive parallel optical fibers links by using various fiber type including commercially available fiber ribbons, multicore fibers and multimode fibers, and discuss the advantages of using parallel optical links regarding transmission capacity and power efficiency.

In the second part we will address optical amplification schemes that support multiple parallel channels like amplifier arrays or cladding pumped fibers amplifiers and related trade-off between the amplification bandwidth, power efficiency, and number of parallel channels, that has recently significantly impacted the design of submarine transmission systems.

The third part of the course will address basic optical switching technologies adapted to support multiple spatial paths and present possible related ultra-high capacity network architectures and address the implications on scalability, network management, and integration with existing WDM systems.

Additionally, the short course will also briefly address more forward-looking SDM technologies like mode-division multiplexing in multimode and coupled-core fibers based on coherent multiple-input-multiple-output (MIMO) digital signal processing, quasi-single-mode transmission, mode-group-division multiplexing, and general transmission over channels with crosstalk.


Short Course Benefits:

By the end of this course you will be able to:

• Summarize key advantages and limitations of different fiber types that can be used to implement massive parallel optical links.

• Describe how capacity and power consumption scale in parallel fiber-optic transmission links.

• List technologies that can be used to implement multi-channel optical amplifiers.

• Discuss power consumption trade-off between optical bandwidth and spatial multiplicity in erbium doped amplifiers. 

• Describe optical switches that support multiple spatial channels and how they can be utilized in optical networks.

• List key advantages and disadvantages of network architectures that support parallel optical channels.

Short Course Audience:

This course is intended for engineers, scientists, managers, technicians and students who want to learn about space-division multiplexing techniques for fiber-optic communication.

Basic knowledge of fiber-optics communication is assumed. By the end of the course, the audience will know how to exploit multiple spatial channels to significantly enhance the capacity of fiber-optic communication links and networks in a cost effective way.


Instructor Biography:

Dr. Roland Ryf is the director of the Photonic Subsystems Research department at Nokia Bell Labs, Murray Hill, NJ, where he is working on photonic technologies for switching, filtering, and amplification in space-division multiplexed optical communication systems. In particular, he has performed numerous record-breaking long distance transmission experiments in multimode and multicore fibers based on multiple-input multiple-output (MIMO) digital signal processing techniques.