Chinese Journal of Lasers, Volume. 18, Issue 2, 139(1991)
Small displacement measurement by optical heterodyne narrow band detection
Two methods for measuring small vibration displacement are reported. The sensitivity of small displacement of optical heterodyne amplitude narrow band de ection reaches 5.2×10-4 nm(2 kHz signal).The amplitude detection method is comparedwith the phase detection method by measuring noise spectrum.
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[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese]. Small displacement measurement by optical heterodyne narrow band detection[J]. Chinese Journal of Lasers, 1991, 18(2): 139
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