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2 September 2015 Interferometric strain measurements with a fiber-optic probe
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Experience at the Laboratory for Laser Energetics has shown that broadband base vibrations make it difficult to position cryogenic inertial confinement fusion targets. These effects must be mitigated for National Ignition Facility–scale targets; to this end an active vibration stabilization system is proposed. A single-mode optical fiber strain probe and a novel fiber contained heterodyne interferometer have been developed as a position feedback sensor for the vibration control system. A resolution limit of 54.5 nƐ; is measured with the optical strain gauge, limited by the lock-in amplifier. Experimental measurements of the sensor that show good agreement with reference resistive strain gauge measurements are presented.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
E. D. Burnham-Fay, D. W. Jacobs-Perkins, and J. D. Ellis "Interferometric strain measurements with a fiber-optic probe", Proc. SPIE 9576, Applied Advanced Optical Metrology Solutions, 95760F (2 September 2015);

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