I think for singlemode LEAF fiber you see something around 100ps/km per degree
C.
Hopefully the fiber is buried and the temperature changes are more gradual.
Scott
Bruce Griffiths wrote:
> Didier wrote:
>> If your concern is simply a stable frequency reference, that's true, even
>> though I am not sure what kind of cleanup oscillator would match the short
>> term stability of a maser. But also if you want to use it as a time
>> standard, the phase shift in the fiber has to be compensated, and it's
>> variations over temperature/humidity/gravity and whatnot must be accounted
>> for.
>>
>> This is time-nuts, we don't simply want to make things work, we want to make
>> them work good :-)
>>
>> Didier
>>
>>
> Didier
>
> A linear temperature ramp will create a linear ramp (equivalent to a
> frequency shift) in the fiber delay.
> Such temperature ramps may be expected at least twice a day. In other
> words the the rate of change of temperature needs to be low to preserve
> the frequency accuracy at the receive end of the fiber.
>
> Bruce
>
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