科研之友
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摘要
Photorefractive optical damage of single beams in LiNbO3 crystals is analyzed within a framework of two photoactive centres (Fe2+/Fe3+ and Nb-Li(4+)/Nb-Li(5+)). It compares model simulations and significant experimental measurements in LiNbO3 waveguides. A good agreement is found in the performed comparisons: photovoltaic currents, refractive index changes and, especially relevant, in degraded beam-profiles. The progress of the degraded wavefront has been simulated by implementing a finite-difference beam-propagating method which includes the model equations. These results, together with previous ones on grating recording, provide a comprehensive, satisfactory explanation of most important questions on photorefractive optical damage.
- 出版日期2010-9-27
