Dynamic holographic interferometry using a BI12SiO20 photorefractive crystal and mono-mode optical fibres

Jason Potter; Ronald C. Spooncer; Peter R. Hobson

doi:10.1117/12.140433

2 March 1993 Dynamic holographic interferometry using a BI₁₂SiO₂₀ photorefractive crystal and mono-mode optical fibres

Jason Potter, Ronald C. Spooncer, Peter R. Hobson

Proceedings Volume 1732, Holographics International '92; (1993) https://doi.org/10.1117/12.140433
Event: Holographics International '92, 1992, London, United Kingdom

Abstract

Dynamic holographic interferometry using polarization preserving optical fibers as light guides and incorporating a photorefractive Bi₁₂SiO₂₀ (BSO) crystal as the recording medium is described. An experimental investigation of the recording of time average holograms through the diffusion process (employing anisotropic self-diffraction) and the drift process (application of dc and ac electric fields across the crystal) is also described. The holographic interferometer was optimized to produce holograms with a high diffraction efficiency and a high signal-to-noise ratio. Results are presented on optimizing parameters such as the writing beam angle and writing beam intensity ratio. The advantages that can be gained by deploying this holographic interferometer in an industrial environment, where the laser light is guided to the location of the object by means of monomode fibers and images are stored within a photorefractive crystal is described. The holographic interferometer is capable of producing time average and double exposure interferograms of vibrating and deformed objects which can be displayed in real time.

Citation Download Citation

Jason Potter, Ronald C. Spooncer, and Peter R. Hobson "Dynamic holographic interferometry using a BI₁₂SiO₂₀ photorefractive crystal and mono-mode optical fibres", Proc. SPIE 1732, Holographics International '92, (2 March 1993); https://doi.org/10.1117/12.140433

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