A 1:64 splitter adds ~18dB of insertion loss, leaving less power for attenuation—so it's only viable for short distances (5–10km). Passive optical splitters distribute a single optical input into multiple outputs in FTTH, ODN, and PON deployments. The choice of split ratio—1×2, 1×4, 1×8, 1×16, 1×32, or 1×64—directly impacts optical power budget, network reach, subscriber density, and long-term expansion capability. Each split. Introduction: The Role of Optical Splitter in PON Network Before delving into split ratios and architectures, it's essential to ground their importance in the broader PON ecosystem. PON networks rely on passive components (no power required) to transmit data between a central OLT (located in a. Optical splitters, encompassing FBT (Fused Biconical Taper) couplers and PLC (Planar Lightwave Circuit) splitters, are prevalent passive optical devices designed to divide fiber optic light into multiple segments based on a specified ratio. Its single-fiber bidirectional transmission mechanism employs WDM, where downstream traffic adopts broadcast mode (1490nm wavelength), and upstream traffic uses TDMA. If we have measured gains in linear units (e. in Watts – W), the loss value in dB is calculated by the formula: Loss (dB) = 10 lg ( mW1 / mW2 ) When both gains are equal, the loss is 0 dB, so there is no loss (doesn't happen obviously).