On the digital holographic interferometry of fibrous material, I: Optical properties of polymer and optical fibers

K. M. Yassien, M. Agour, C. von Kopylow, H. M. El-Dessouky

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21 Citations (Scopus)


Digital holographic interferometry (DHI) was utilized for investigating the optical properties of polymer and optical fibers. The samples investigated here were polyvinylidene fluoride (PVDF) polymer fiber and graded-index (GRIN) optical fiber. The phase shifting Mach-Zehnder interferometer was used to obtain five phase-shifted holograms, in which the phase difference between two successive holograms is π/2, for each fiber sample. These holograms were recorded using a CCD camera and were combined to gain the complex wavefield, which was numerically reconstructed using the convolution approach into amplitude and phase distributions. The reconstructed phase distribution was used to determine the refractive index, birefringence and refractive index profile of the studied samples. The mean refractive index has been measured with an accuracy up to 4×10-4. The main advantage of DHI is to overcome the manual focusing limitations by means of the numerical focusing. The results showed accurate measurements of the optical properties of fibers.
Original languageEnglish
Pages (from-to)555-560
Number of pages6
JournalOptics and Lasers in Engineering
Issue number5
Early online date18 Jan 2010
Publication statusPublished - May 2010
Externally publishedYes


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