[Hackrf-dev] Input from Photodiode

[Ian Davidson]

An unusual request here, HackRF folks.



I'm looking at the possibility of using HackRF and SDR# (or similar) to detect the beating of two lasers on a fast photodiode.



I know the frequencies of light and RF are several orders of magnitude different but if the lasers (or cavities) are any good (near single mode, stable etc)  then you *do* get a heterodyne beat (Google 'laser heterodyne spectroscopy' if you are keen).



My question is - can anyone on the forum  offer me any thoughts on the best way to interface a Photodiode to the HAckRF input?



Many Thanks



Ian


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