The FD80 from Nortus Optronic GmbH is a Photodiode with Wavelength Range 1300 to 1550 nm, Capacitance 0.4 to 0.75 pF, Dark Current 0.1 to 1 nA, Responsivity/Photosensitivity 0.8 to 0.9 A/W, Active Area Diameter 80 µm. More details for FD80 can be seen below.