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All-polarisation beamsplitters for interferometer applications
S. L. Kranzhoff, Z. Van Ranst, J. De Bolle +9
Optical beamsplitters with similar properties for orthogonal, linear polarisation modes are required for realising polarisation-based speedmeter schemes to reduce back-action noise…
Local-Oscillator Noise Coupling in Balanced Homodyne Readout for Advanced Gravitational Wave Detectors
Sebastian Steinlechner, Bryan W Barr, Angus S Bell +13
The second generation of interferometric gravitational wave detectors are quickly approaching their design sensitivity. For the first time these detectors will become limited by qu…
Three mode interaction noise in laser interferometer gravitational wave detectors
Li Ju, Chunnong Zhao, Yiqiu Ma +3
Triply resonant three mode interactions in long optical cavities have been shown to lead to enhanced scattering of carrier light by the ultrasonic acoustic modes of the test mass m…
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…
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…