Fig. 1. Physical backplane structure of optical fiber cabling

Fig. 2. Average fiber loss results for three cases of fiber arrangement

Fig. 3. Schematic diagram of four fiber crossover methods for a four-layer optical fibers

Fig. 4. Average fiber loss results for all fibers in 4 layers for 4 fiber crossing cases

Fig. 5. Average fiber loss results for seven physical backplanes

Fig. 6. Three-layer fiber cross structure

Fig. 7. Average fiber loss results for different fiber cross-pitches

Fig. 8. Schematic diagram of the optical fiber routing scheme of the 8×8 double-layer optical backplane

Fig. 9. Actual picture of the 8×8 double-layer optical backplane

Fig. 10. Schematic diagram of the traditional 8×8 flexible optical backplane optical fiber wiring structure

Fig. 11. Average fiber loss results of optical backplane based on the proposed design and conventional optical backplane

Fig. 12. Schematic diagram of the single-layer optical fiber routing scheme for double-layer flexible n×n optical backplane