Generation of femtosecond double pulse by adjusting the refractive index modulation of volume holographic grating
Applied Physics B: Lasers and Optics, ISSN: 0946-2171, Vol: 112, Issue: 1, Page: 67-72
2013
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Article Description
Based on the modified Kogelnik's coupled-wave theory, expressions of diffraction field distribution of volume holographic grating (VHG) are derived when it is illuminated by an ultrashort pulse. It is found that the diffracted pulse is involved into two pulses, and the two-pulse interval is found to be proportional to the refractive index modulation of the VHG. Moreover, the emergence of double pulses is periodic. An overmodulation effect of refractive index modulation of transmitted VHG is used to explain this particular diffraction behavior of the VHG. Results of our study provide a feasible method to generate interval adjustable double pulse with a simple system. © 2013 Springer-Verlag Berlin Heidelberg.
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Springer Science and Business Media LLC
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