Diffraction properties study of multi-layer reflection volume holographic grating under ultra-short pulse readout
2011
Based on the modified coupled-wave theory of single volume grating and matrix theory, the time-domain diffraction of
multi-layer reflection volume holographic gratings recorded in photorefractive LiNbO 3 crystals are theoretically studied
when they are illuminated by ultrashort pulse laser. Study shows that the waveforms of the diffracted pulses depend on
the readout pulse duration, grating periods, refractive index modulation of the grating, thickness of the buffer layers and
gating layers. The diffracted waveforms and intensity can be controlled to satisfy our demands by changing these
parameters. Also it is found that the diffracted pulses have a displacement along the time-axis compared with readout
pulse. Results of our study can be used in pulse shaping and designing new optical devices based on multiple layers of
volume holographic grating.
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