I am trying to produce voltage pulses with very short rise time (<15 ps), medium width (20 ns) and amplitudes up to 15 V. As a promising candidate I selected photoconductive switches and ultrafast photodiodes. However, I have limited knowledge about electronics at all and thus, even less knowledge about these devices. Do you think it is possible to produce pulses like that by applying a constant bias DC voltage (for example 15 V) to the switch/diode and send a laser pulse with approx. 20 ns width to the photosensitive area?
I already found photoconductive switches at Hamamatsu and Laser Quantum that might work. In particular, I am talking about the G4176-01 and the Tera-SED3, respectively. However, I cannot imagine how to connect these switches. For the Tera-SED3, one would have to use the ground as the output but how to deal with the grounds than without violating the impedance?
I appreciate any help, advise, new insights and ideas. Also, if you know another supplier of photoconductive switches or photodiodes that might work for my purposes, I would be very grateful if you share these with me.