20 November 2016, Volume 3, Issue 11, pp. 1153-1284

Optical micrograph of a cross-section of a photonic bandgap fiber. The array of circles are rods of doped-glass set in a fused silica background. Intense colors within each rod are guided modes of each individual waveguide.

See Francis-Jones et al., pp. 1270-1273.

See print version of the cover.