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Precision angle sensor using an optical lever inside a Sagnac interferometer
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DOI：10.1364/OL.36.001698.png)
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We built an ultra-low-noise angle sensor by combining a folded optical lever and a Sagnac interferometer. The instrument has a measured noise floor of 1.3 prad/root Hz at 2.4 kHz. We achieve this record angle sensitivity using a proof-of-concept apparatus with a conservative N = 11 bounces in the optical lever. This technique could be extended to reach subpicoradian/root Hz sensitivities with an optimized design. (C) 2011 Optical Society of America
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3.3
论文数:
4.0W
被引数:
7.6W
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