A femtosecond laser pulse generates an electrical pulse on a photodiode.
Pulse is gaussian like with a FWHM of 590ps thanks to the rise time of the PD (175ps) - this means a Bandwith of up to 2GHz
The ADL5502 is used for RMS and peak measurements of RF signals, this means "modulated high frequency AC"
My signal is just a single short pulse every 100kHz
I do not know how to deal with the datasheet sentence: "Envelope bandwiths of 10MHz". This would somehow render the device useless for signals over 10MHz
I need to know the true speed of the peak detector and if it can follow my pulse. And if a slower photodiode can improve the setup.
A first test showed it somehow working. I used a second, phase shifted 100kHz signal to reset the peak detect so it would be triggered again at each pulse. Sadly, the height of the peak detect level was only around the 15mV level. Furthermore it was somehow fluctuating - this is why I need to know about the exact data and reproducibility.
A question related to this has already been posted, but couldn't help me:
Best regards, Simon