2.5 Gbps Front-Illuminated APD Chip
The Lumentum 2.5 Gbps front-illuminated avalanche photodiode (FI-APD) is designed for gigabit passive optical networks (GPON) that enable data transmissions for fiber-to-the-home (FTTH) offerings. As a result of their internal gain, APDs can significantly enhance receiver sensitivity relative to a standard PI photodiode.
This FI-APD uses Lumentum proprietary APD designs known for their superior reliability. The dark current at 95 percent of breakdown voltage is typically in the sub-nano-amp range. It has an optical window of 53 µm, and a remote metal bond pad of 60 µm. The FI-APD has an operating temperature range from -40°C to 85°C, and the sensitivity with a low noise TIA can reach -33 dBm.
All APD chips come from Lumentum-qualified wafers. Qualification includes burn-in and functional testing of a sample quantity of chips from each wafer. Each die shipped is tested at 25°C.