Abstract
In this paper, the influence of the pulse exposures repetition frequencies on volume holograms recording in photopolymer films is studied. Using a pulsed diode-pumped YAG laser (532-nm wavelength) as recording source, volume holograms are recorded with the same pulse energy fluence (0.1mJ/cm<sup>2</sup> per pulse) but different pulse exposures repetition frequencies. The diffraction efficiency and light scattering are real-time measured as the holographic grating is formed. Experimental results show that the maximum diffraction efficiency and refractive index modulation can be obtained at an optimal repetition frequency. And an upper limit for total exposure energy and an optimal pulse repetition frequency are necessary to keep low scattering noise.
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