Space-division multiplexing (SDM), which consists in exploiting multimode (MMF) or multicore fibers instead of single mode ones, is one of the future architectures to increase data rates and network planning flexibility. A desired working condition for SDM is the so called strong-coupling linear regime, which is however not intrinsically achievable in common MMFs. With this topic, the student has the chance to investigate if it would be achievable with some new design. If you are curious about it, just send a mail to paolo.carniello@tum.de.

Basics of Optical Communication Systems (see https://www.ce.cit.tum.de/en/lnt/teaching/lectures/optical-communication-systems/)

During the internship, the student will be researching the application of Neural Network-based signal predistortion to mitigate the effects of fiber chromatic dispersion in direct detection systems.

• basic Python skills beneficial

Photonic crystal fibers (PCFs) have emerged as a promising platform for a wide range of applications due to their unique properties and design flexibility. These fibers consist of a periodic array of microstructured air holes that run along the length of the fiber, which enables precise control over the propagation of light. Of particular interest are hollow core fibers, which are characterized by a central void that enables light to be confined within the hollow core. As research and development in this field continue to advance, photonic crystal fibers are poised to play a pivotal role in the next generation of optical communication and sensing systems.

The students task is to provide a comprehensive overview of PCFs with a focus on characterizing their distinctive linear and nonlinear properties. 

Possible literature:

• Philip St.J. Russell, "Photonic-Crystal Fibers," J. Lightwave Technol. 24, 4729-4749 (2006)
• Benabid, F., and P. J. Roberts. "Linear and nonlinear optical properties of hollow core photonic crystal fiber." Journal of Modern Optics 58.2 (2011): 87-124.

• lecture: Optical Communication Systems