[time-nuts] Photodiodes for high frequency OPLL

Bruce Griffiths bruce.griffiths at xtra.co.nz
Sun Mar 31 16:08:51 EDT 2013

Nothing to do with laser line width.
Merely indicating that the photodiode mixer can be used with a suitable 
LO to build an optical spectrum analyser front end.


Attila Kinali wrote:
> Moin,
> On Sun, 31 Mar 2013 12:28:59 +1300
> Bruce Griffiths<bruce.griffiths at xtra.co.nz>  wrote:
>> With a suitable low noise tunable LO (laser) the frequency spectrum
>> beyond the photodiode electrical bandwidth can be explored.
> I don't exactly get how the laser spectrum (line width?) can be
> exploited to go beyond the photodiode bandwidth?
> Could you explain that a little bit?
> 			Attila Kinali

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