Measurement of small vibration amplitudes of a rough surface by an interferometer with a self-pumped phase-conjugate mirror |
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| Authors: | Wang X Sasaki O Suzuki T Maruyama T |
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| Affiliation: | Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China. |
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| Abstract: | The application of a Michelson interferometer with a self-pumped phase-conjugate mirror to measure small vibration amplitudes of a rough surface is described. The distorted wave front of the light that is diffusely reflected from the rough surface is restored by phase conjugation to provide an interference signal with a high signal-to-noise ratio. The vibration amplitudes of a stainless-steel sample are measured with a precision of ~5 nm. |
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