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Coherent photo-thermal noise cancellation in a dual-wavelength optical cavity for narrow-linewidth laser frequency stabilisation

Dawel, Fabian; Wilzewski, Alexander; Herbers, Sofia; Pelzer, Lennart; Kramer, Johannes; Hild, Marek B.; Dietze, Kai; Krinner, Ludwig; Spethmann, Nicolas C. H.; Schmidt, Piet O. (Washington, DC : Optica, 2024)

Optical resonators are used for the realisation of ultra-stable frequency lasers. The use of high reflectivity multi-band coatings allows the frequency locking of several lasers of different wavelengths to a single cavity. ...
Cryogenic silicon Fabry-Perot resonator with Al0.92Ga0.08As/GaAs mirror coatings

Yu, Jialiang (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2023)

The sensitivity and stability of today's most precise optical interferometers, like gravitational wave detectors and ultra-stable lasers, are fundamentally limited by thermodynamically induced length fluctuations of ...
Numerical analysis of LG3,3 second harmonic generation in comparison to the LG0,0 case

Heinze, Joscha; Vahlbruch, Henning; Willke, Benno (Washington, DC : OSA - The Optical Society, 2020)

For coating Brownian thermal noise reduction in future gravitational wave detectors, it is proposed to use light in the helical Laguerre-Gaussian LG3,3 mode instead of the currently used LG0,0 mode. However, the simultaneous ...
Squeezed States of Light for Future Gravitational Wave Detectors at a Wavelength of 1550 nm

Meylahn, Fabian; Willke, Benno; Vahlbruch, Henning (College Park, Md. : APS, 2022)

The generation of strongly squeezed vacuum states of light is a key technology for future ground-based gravitational wave detectors (GWDs) to reach sensitivities beyond their quantum noise limit. For some proposed observatory ...
Thickness uniformity measurements and damage threshold tests of large-area GaAs/AlGaAs crystalline coatings for precision interferometry

Koch, P.; Cole, G.D.; Deutsch, C.; Follman, D.; Heu, P.; Kinley-Hanlon, M.; Kirchhoff, R.; Leavey, S.; Lehmann, J.; Oppermann, P.; Rai, A.K.; Tornasi, Z.; Wöhler, J.; Wu, D.S.; Zederbauer, T.; Lück, H. (Washington, DC : OSA - The Optical Society, 2019)

Precision interferometry is the leading method for extremely sensitive measurements in gravitational wave astronomy. Thermal noise of dielectric coatings poses a limitation to the sensitivity of these interferometers. To ...

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