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13 September 2010 Phase retrieval method for multiple wavelength speckle patterns
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Proceedings Volume 7387, Speckle 2010: Optical Metrology; 73871T (2010)
Event: Speckle 2010, 2010, Florianapolis, Brazil
We present a wavefront retrieval method for radiation comprising several wavelengths. Both numerical models and experimental results are presented. Numerical modeling implies iterative phase retrieval procedure for all wavelengths in spectrum. For reconstruction we can use two different algorithms, one inherits from one proposed by Osten, Pedrini and Almoro, the second one implies expansion by Hermite-Gauss or Laguerre-Gauss basis set which allows to decrease calculation time consumption. In experiment, speckle patterns can be formed either by spectral supercontinuum radiation from photonic-crystal fiber (PCF) or by Stokes components of stimulated Raman scattering (SRS) from second harmonic of pulse Nd:YAG laser radiation in barium nitrate crystal.
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Nickolay V. Petrov, Victor G. Bespalov, and Andrei A. Gorodetsky "Phase retrieval method for multiple wavelength speckle patterns", Proc. SPIE 7387, Speckle 2010: Optical Metrology, 73871T (13 September 2010);

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