SC408 - Space Division Multiplexing in Optical Fibers
Monday, 09 March
09:00 - 12:00
Short Course Level: Advanced Beginner
Roland Ryf; Nokia Bell Labs, USA
Short Course Description:
The course provides the background and the principles necessary to understand the transmission of multiple optical signal channels over optical fibers by using spatially diverse light paths (space-division multiplexing).The course will cover transmission over different fiber types, multipath amplification schemes and switching architectures for optical networks that support multiple parallel paths.
In the first part of the course the basics of optical transmission over parallel single-mode fibers, multicore fibers with uncoupled and coupled cores, and multimode fibers will be explained. In particular various transmission techniques like mode-division multiplexing based on multiple-input-multiple-output (MIMO) digital signal processing, quasi-single-mode transmission, mode-group-division multiplexing, and transmission over channels with crosstalk will be addressed in detail. Further, I will also address the impact on system performance of space-division multiplexing related impairments like mode-dependent loss (MDL), differential-group delay (DGD), and the basics of nonlinear effects in multimode and multicore fibers.
The second part of the course, will address optical amplification of multiple spatial paths by using core or cladding pumping, and trade-offs between amplifier bandwidth and number of spatial channels that is relevant in power constrained environments, like for example in submarine communication.
The third part of the course will address basic optical switching technologies adapted to support multiple spatial paths and present related ultra-high capacity network architectures.
The course is heavily based on experimental results performed with multimode fibers with modes numbers ranging from 3 to 45 modes, coupled and uncoupled multi-core fibers, and includes experimental results of various optical amplifiers and switches.
Short Course Benefits:
By the end of this course you will be able to:
- Discuss how multiple cores or modes can be exploited to improve the capacity of a fiber optical communication channel.
- Summarize key advantages and limitations of different fiber types for space-division multiplexing.
- Describe the basics of core and cladding pumped erbium doped amplifiers for multichannel amplification.
- 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.
Roland Ryf is a distinguished member of technical staff in Photonic Subsystems Research at Nokia Bell Labs, Holmdel, 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.