Observation of long-term changes in the effective refractive index of light

2019/01/15 by Adrian C. Melissinos, Melissinos, Adrian
Earth and Planetary Sciences · Engineering · Physics and Astronomy · #Adaptive optics and wavefront sensing #FOS: Physical sciences #General Physics (physics.gen-ph) #Geophysics and Gravity Measurements #Geophysics and Sensor Technology

paper · pdf · doi:10.48550/arxiv.1901.08442

openalex publication_date 2019/01/15 · openalex created_date 2019/02/21 · openalex updated_date 2026/07/28

Abstract

During the LIGO S5 run (April 2006 to June 2007) preliminary data from the H1 interferometer recorded long-term changes in the effective refractive index of light over a 14 month period. These are due to the presence of external gravity gradients along the arms of the interferometer. After accounting for the effect of the tides, an unexpected twice-annual modulation was observed.

Citations

• On the Possible Detection of Low Frequency Periodic Signals in Gravitational Wave Interferometers

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