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

Miller, John; Ngo, Silvie; Mullavey, Adam J; Slagmolen, Bram J J; Shaddock, Daniel A; McClelland, David E


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.

CollectionsANU Research Publications
Date published: 2012-12-01
Type: Journal article
Source: Optics letters
DOI: 10.1364/OL.37.004952


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