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  An  FBT (Fused Biconical Taper) Splitter  is a fundamental type of  passive optical component  used extensively in fiber optic communication networks to split an incoming optical signal into two or more outgoing signals. It's one of the two main technologies for manufacturing  fiber splitters , the other being PLC (Planar Lightwave Circuit). 1. Core Principle (Based on Evanescent Wave Coupling):   Two or more optical fibers are precisely  twisted together ,  heated  (using a burner or electric heater), and  stretched  (tapered) while fused. As the fibers are fused and tapered, their cores come very close together within the coupling region. Light traveling in the core of one fiber extends slightly beyond its core into the cladding (this is the "evanescent wave"). In the fused region, the evanescent wave of one fiber overlaps with the core of the adjacent fiber. This allows light energy to  couple  from one core into...

  A DAC (Direct Attach Copper) cable, commonly used in data centers and high-speed networking environments, is designed for short-range communication between network devices such as switches, routers, and servers. It typically has integrated transceivers at both ends, allowing it to transmit data at high speeds without needing separate optical transceivers. Common Data Rates for DAC Cables: 10G SFP+ DAC : Supports a data rate of  10 gigabits per second  (Gbps). These cables are used for 10G Ethernet and can span distances up to 7 meters. 25G SFP28 DAC : Supports a data rate of  25 Gbps  and is often used in modern data centers for 25G Ethernet connections, with typical distances of up to 5 meters. 40G QSFP+ DAC : Supports  40 Gbps , commonly used for 40G Ethernet. The maximum length is usually 3-7 meters. 100G QSFP28 DAC : Supports  100 Gbps , typically used for 100G Ethernet. These cables are used for short distances up to 3-5 meters. 200G QSFP56 DAC ...