The FD100 from Nortus Optronic GmbH is a Photodiode with Wavelength Range 1300 to 1550 nm, Capacitance 1.1 to 1.5 pF, Dark Current 0.5 to 3 nA, Responsivity/Photosensitivity 0.8 to 0.95 A/W, Active Area Diameter 100 µm. More details for FD100 can be seen below.