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The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including by researchers from the Department of Computer & Information Sciences involved in mathematically structured programming, similarity and metric search, computer security, software systems, combinatronics and digital health.

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Synchronously pumped optical parametric oscillation in periodically poled lithium niobate with 1-W average output power

Graf, T. and McConnell, G. and Ferguson, A.I. and Bente, E. and Burns, D. and Dawson, M.D. (1999) Synchronously pumped optical parametric oscillation in periodically poled lithium niobate with 1-W average output power. Applied Optics, 38 (15). pp. 3324-3328. ISSN 1559-128X

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Abstract

The method presented extracts the demodulated phase from only one fringe pattern. Locally, this method approaches the fringe pattern morphology with the help of a mathematical model. The degree of similarity between the mathematical model and the real fringe is estimated by minimizing a correlation function. To use an optimization process, we have chosen a polynomial form such as a mathematical model. However, the use of a polynomial form induces an identification procedure with the purpose of retrieving the demodulated phase. This method, polynomial modulated phase correlation, is tested on several examples. Its performance, in terms of speed and precision, is presented on very noised fringe patterns.