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- W4297821826 abstract "Balanced homodyne interferometry is a well-known detection technique that allows for sensitive characterization of light fields. Conventionally a homodyne interferometer is operated by locking the relative phase of a reference beam to the signal beam by means of an active feedback loop. A less often used method is to perform a slow continuous modulation of the reference beam arm length that corresponds to averaging all relative phases during the measurement.Here we show theoretically and experimentally that this quadrature averaging can be advantageous in estimating the parameters of a resonant optical cavity. We demonstrate that the averaging turns the transduction function, from cavity frequency fluctuations into the interferometer signal, into a simple function of the laser detuning that, notably, does not depend on the parameters of possible non-resonant channels present in the system. The method needs no active feedback and gives results that are easy to interpret. Moreover, the phase-averaged measurement allows to characterize the absolute magnitude of a cavity frequency modulation." @default.
- W4297821826 created "2022-10-01" @default.
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- W4297821826 date "2022-09-13" @default.
- W4297821826 modified "2023-10-16" @default.
- W4297821826 title "Quadrature-averaged homodyne detection for cavity parameter estimation" @default.
- W4297821826 doi "https://doi.org/10.48550/arxiv.2209.05807" @default.
- W4297821826 hasPublicationYear "2022" @default.
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