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Scattering Loss in Precision Metrology due to Mirror Roughness
Yehonathan Drori, Johannes Eichholz, Tega Edo +5
Optical losses degrade the sensitivity of laser interferometric instruments. They reduce the number of signal photons and introduce technical noise associated with diffuse light. I…
Global optimization of multilayer dielectric coatings for precision measurements
Gautam Venugopalan, Francisco Salces-Cárcoba, Koji Arai +1
We describe the design of optimized multilayer dielectric coatings for precision laser interferometry. By setting up an appropriate cost function and then using a global optimizer…
Quantum correlation measurements in interferometric gravitational wave detectors
D. V. Martynov, V. V. Frolov, S. Kandhasamy +199
Quantum fluctuations in the phase and amplitude quadratures of light set limitations on the sensitivity of modern optical instruments. The sensitivity of the interferometric gravit…
Coherent Cancellation of Photothermal Noise in GaAs/AlGaAs Bragg Mirrors
Tara Chalermsongsak, Evan D. Hall, Garrett D. Cole +7
Thermal noise is a limiting factor in many high-precision optical experiments. A search is underway for novel optical materials with reduced thermal noise. One such pair of materia…
Broadband Measurement of Coating Thermal Noise in Rigid Fabry-Perot Cavities
Tara Chalermsongsak, Frank Seifert, Evan D. Hall +3
We report on the relative length fluctuation of two fixed-spacer Fabry-Perot cavities with mirrors fabricated from silica/tantala dielectric coatings on fused silica substrates. By…
A Technique for In-situ Measurement of Free Spectral Range and Transverse Mode Spacing of Optical Cavities
Alberto Stochino, Koji Arai, Rana X. Adhikari
Length and g-factor are fundamental parameters that characterize optical cavities. We developed a technique to measure these parameters in-situ by determining the frequency spacing…