FTTH Butterfly Optic Cables, also known as flat drop fiber cables, feature a compact flat profile with optical fibers placed at the center and reinforced by parallel strength members on both sides. The outer sheath is typically LSZH or PVC, optimized for indoor and outdoor. The invention belongs to the technical field of optical cables, and discloses a butterfly-shaped drop-in optical cable for communication, which has a fitting part (1), a plurality of protection bodies (2), a plurality of butterfly-shaped drop-in units (3), a protective layer (4), The outer sheath. see Figure 1 to Figure 6, a butterfly-shaped lead-in optical cable, which has a butterfly-shaped lead-in part 1, two spliced parts 2, and two insulated power lines 3, and the insulated power lines 3 are composed of a conductor 31 and an insulating layer 32 covering the conductor 31; It is. Photonic crystal fiber is based on periodic morphological microstructure of air-holes where different arrangement of air holes led to different types of structures. Several types of structures with different shapes like Hexagonal, Octagonal, Honeycomb, Circular etc. This article focuses on practical deployment, structural features, performance advantages, and real-world. Butterfly-shaped optical fiber cables are a popular type of fiber optic cable that is commonly used for data transmission in telecommunication networks.