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Doctoral Candidate: Divya Ann Shaji


Host institution: University of L'Aquila (UnivAQ)

Project: Modelling of HOM technologies for transmission and sensing


Divya Shaji completed her B. Sc. Physics from Women’s Christian College, India in 2018 and M. Sc. Physics from University of Madras, India in 2021. She worked as a Junior Research Fellow at The Inter-University Centre for Astronomy and Astrophysics, where she worked towards designing an imaging system for an optical atomic clock and then at the Indian Institute of Technology, Madras on research related to NV centers in diamonds.

Project Objectives:

  • Modelling coupling, spatial modal dispersion, and mode-dependent loss in deployed fibres with groups of strongly coupled modes for various transmission regimes (from short distance to long-haul and submarine);
  • Modelling nonlinear interference noise in various regimes of inter-mode coupling;
  • Modelling crosstalk and time-skew dynamics in deployed uncoupled multi-core fibres;
  • Modelling amplification schemes for multi-core and multi-core fibres;
  • Modelling power consumption of SDM systems and devising power-efficient transmission schemes;
  • Devising techniques for characterizing environmental changes based on the system impulse response of coherent SDM systems.

Expected Results: Modelling linear and nonlinear propagation in installed SDM fibres including comparing experimental results against measurements obtained by partners of the DN. Derivation of equations describing linear and nonlinear propagation effects in various intermode coupling regimes. Demonstration of novel amplification schemes. Development of efficient software tool - made available to the research community. Characterization of the time dynamics of some of the key properties of deployed SDM links, in particular inter-core skew in uncoupled-core multi-core fibres. Assessment of the system power consumption. Devising of measurement schemes that allow extracting information regarding mechanical and thermal perturbations that affect an SDM fibre link.