An All-Solid Dispersion-Compensating Photonic Crystal Fiber Based on Mode Coupling Mechanism in Dual-Concentric Core

Figure 2

Effective index of inner core fundamental (solid line), outer core second-order mode (dashed line), and only inner core or only outer core fundamental mode (dotted or dash-dotted line). Insets show the modal field distributions of inner core fundamental mode and outer core second-order mode.