Publications by authors named "Maria C Nistal"
Few-mode graded-index optical fibers are being increasingly relevant in spatial division multiplexing. Likewise, multi-region binary phase plates are fundamental elements for some mode multiplexing schemes in such optical fibers. In this work, we propose a coupling configuration for mode multiplexing based on collimating-focusing graded-index lenses together with binary phase plates, and calculate, in a fully analytical and quasi-analytical way, the theoretical conversion efficiencies and crosstalks between the fields generated by such plates and the Laguerre-Gaussian modes.
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- A Mach-Zehnder interferometer (MZI) can efficiently (de)multiplex various modes in few mode fiber using either a reflective image inverter or a Gouy phase shifter (RGPS), without fundamental loss.
- The study introduces the use of RGPS with binary phase plates for multiplexing, although only low order modes are multiplexed accurately with the RGPS that shifts π for odd modes.
- A new, more compact refractive image inverter is proposed to enhance performance and minimize crosstalk between modes, and experimental results demonstrate successful bimodal multiplexing using both the approximated and exact versions of the inverter, with the RGPS proving effective at demultiplexing odd modes in a unique manner.