Full-Optical Two-Channel Adaptive System for Detecting Microcantilever Vibrations |
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| Authors: | Roman Romashko Timofey Efimov Yuri Kulchin |
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| Institution: | 1.Laboratory of Precision Optical Measurement Techniques Institute of Automation and Control Processes,Russian Academy of Sciences,Vladivostok,Russia;2.School of Natural Sciences,Far-Eastern Federal University,Vladivostok,Russia |
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| Abstract: | We demonstrate a full-optical two-channel system for measuring mechanical vibrations of microoscillators, which is based on adaptive holographic interferometer using multiwave mixing in a photorefractive crystal. The orthogonal geometry of dynamic hologram recording makes possible independent operation of the measurement channels. The absolute detection limit of the system to cantilever vibrations in a channel amounted to 2.6·10 ?6 nm·W1/2 ·Hz ?1/2. We tested the system in simultaneous detection of vibrations of two cantilevers with dimensions 215×40×15 μm. |
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