Today's Broadband Fiber Access Technologies and Deployment Considerations at SBC

Optical access networks

“…WDM coupler, onto a single chip. It also enables a uniform loss over a wide operating range of wavelengths from 1250 nm to 1625 nm [27,[34][35][36][37]. A PLC-based splitter suffers excess insertion loss from fiber array alignment to the PLC chip, fiber array uniformity caused by pitch and depth inaccuracies in the v-grooves of fiber array block that holds the fiber array, splitting ratio uniformity caused by imperfections in the PLC chip due to manufacturing, inherent chip material loss, and connector loss.…”