The IG17X1300S4i from Laser Components is a Photodiode with Wavelength Range Cut off Wavelength: 1.65 µm, Capacitance 305 pF, Dark Current 2 to 20 nA, Responsivity/Photosensitivity 0.9 to 1.05 A/W, Active Area Diameter 1300 µm. More details for IG17X1300S4i can be seen below.