The photodiode material is silicon, and the response spectrum is 300-1100nm; UV enhancement at 355nm; with a large target surface of 3000um, it is very suitable for doing low light detection, fluorescence detection and other applications.
The PZT was used to test the Distributed Fiber Optic Acoustic Sensing System DAS at a location of 50KM, using a repetition frequency of 2000Hz, capable of testing signals at 980Hz.