The 120-10036-0001 (ET-3000A) from Coherent Corp. is a Photodetector with Wavelength Range 1300 nm, Supply Voltage 24 VDC, Rise Time <40 ps, Bandwidth 30 kHz to 1.5 GHz, Active Area Diameter 100 µm. More details for 120-10036-0001 (ET-3000A) can be seen below.