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4 papers · 2 filters
Interferometer readout-noise below the Standard Quantum Limit of a membrane
Tobias Westphal, Daniel Friedrich, Henning Kaufer +7
Here we report on the realization of a Michelson-Sagnac interferometer whose purpose is the precise characterization of the motion of membranes showing significant light transmissi…
Diffractively coupled Fabry-Perot resonator with power-recycling
Michael Britzger, Daniel Friedrich, Stefanie Kroker +6
We demonstrate the optical coupling of two cavities without light transmission through a substrate. Compared to a conventional coupling component, that is a partially transmissive…
Laser interferometry with translucent and absorbing mechanical oscillators
D. Friedrich, H. Kaufer, T. Westphal +7
The sensitivity of laser interferometers can be pushed into regimes that enable the direct observation of quantum behaviour of mechanical oscillators. In the past, membranes with s…
Waveguide grating mirror in a fully suspended 10 meter Fabry-Perot cavity
Daniel Friedrich, Bryan W. Barr, Frank Brückner +14
We report on the first demonstration of a fully suspended 10m Fabry-Perot cavity incorporating a waveguide grating as the coupling mirror. The cavity was kept on resonance by readi…