Control and tuning of a suspended Fabry-Perot cavity using digitally enhanced heterodyne interferometry

We present the first demonstration of real-time closed-loop control and deterministic tuning of an independently suspended Fabry-Perot optical cavity using digitally enhanced heterodyne interferometry, realizing a peak sensitivity of ~10 pm/√Hz over the 10-1000 Hz frequency band. The methods present...

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Bibliographic Details
Published in:Optics letters 2012-12, Vol.37 (23), p.4952-4954
Main Authors: Miller, John, Ngo, Silvie, Mullavey, Adam J, Slagmolen, Bram J J, Shaddock, Daniel A, McClelland, David E
Format: Article
Language:English
Subjects:
Detectors
Extensibility
Fabry-Perot
Frequency bands
Holes
Interferometry
Real time
Tuning
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Summary:We present the first demonstration of real-time closed-loop control and deterministic tuning of an independently suspended Fabry-Perot optical cavity using digitally enhanced heterodyne interferometry, realizing a peak sensitivity of ~10 pm/√Hz over the 10-1000 Hz frequency band. The methods presented are readily extensible to multiple coupled cavities. As such, we anticipate that refinements of this technique may find application in future interferometric gravitational-wave detectors.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.37.004952