Two-mode Fiber with a Reduced Mode Overlap for Uncoupled Mode-division Multiplexing in C+L Band

다국어 초록 (Multilingual Abstract)

We proposed a two-mode fiber (TMF) design that can effectively reduce the mode overlap between LP<SUB>01</SUB> and LP<SUB>11</SUB> modes by using a W-shaped index profile core structure, which is a primary concern in uncoupled mode division multiplexing (MDM). TMF has a three-layered core structure; central circular core, inner cladding, and outer ring core. We confirmed that in an optimal structure the LP<SUB>01</SUB> mode was highly confined to the central core while the LP<SUB>11</SUB> mode was guided along the outer ring core to result in a minimum overlap integral. We used a full-vectorial finite element method to estimate effective index, differential group delay (DGD), confinement loss, chromatic dispersion, and mode overlap controlling the parameters of the W-shaped structure. The optimized W-profile fiber provided optical characteristics within the ITU-T recommended standards over the entire C+L band.

목차 (Table of Contents)

• I. INTRODUCTION
• II. PROPOSED WAVEGUIDE AND STRUCTURAL PARAMETERS
• III. MODAL CHARACTERISTICS OF TMF
• IV. CONCLUSION
• REFERENCES