Low-Differential-Mode-Group-Delay 9-LP-Mode Fiber

Abstract

We report the optimization of a few-mode fiber, adapted to multiple-input multiple-output mode division multiplexing, that supports 9 LP modes (15 spatial modes). The fiber is fabricated using standard multimode processes, which allows for tight process tolerances, yielding low differential mode group delays (<;155 ps/km) with low attenuations (<;0.22 dB/km), large effective areas (≥95 μm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> ) and low bend losses.