Extremely large mode-area compact hybrid multi-trench fiber with controlled leakage loss

摘要

We propose an extremely large mode-area compact hybrid multi-trench fiber with ~40μm core at 1064nm. High-index arc in trench helps to achieve modearea of 1300μm2 at a practical bending radius of 7.5cm. Resonant rings and trench gaps maintain effectively single-mode operation and bending loss constraints.