NEED HELP to find a suitable photodiode for my distance measurement project

[aishak_97]

hi im not a pro in electronics.. im doing it as a hobby.. im doing a laser distance measurement with phase difference method.. my target is to measure upto 50 meters. im using a 635nm 1mw photo diode i want to know what what photo diode i need to use here. and how to figure it out? i mean is there any calculations i need to do for that?

and im using AD8302 to calculate the phase difference.. what kind of amplifier i need to use here? if you have schematics pls help me here

 

[Audioguru]

You need a VERY bright light (laser beam?) or good focussing to go 50m.
The high frequency response of the photo diode and AN8302 might not be high enough to show the phase difference of light.

 

[crutschow]

What modulating frequency are you using?

 

[aishak_97]

thanks Audioguru

im using 350-500 MHz of modulating frequency and why is AD8302 not suitable for this?