AUTHOR=Drljača Branko , Simović Ana , Djordjevich Alexandar , Aidinis Konstantinos , Savović Svetislav TITLE=Improving the bandwidth of microstructured multimode W-type POFs in the visible light range JOURNAL=Frontiers in Physics VOLUME=13 YEAR=2025 URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2025.1537525 DOI=10.3389/fphy.2025.1537525 ISSN=2296-424X