Acta Optica Sinica, Volume. 13, Issue 5, 461(1993)
Further studies of DC space-charge field in KTa1-xNbxO3:Cu crystals
The photorefractive grating in a KTa1-xNbxO3:Cu (x=0.32) crystal was erased with an expanded beam and one of the writing beams, respectively. Through the different erasing effects, it was further demostrated that besides a periodic space-charge field a DC space-charge field was formed simultaneously during writing. Meanwhile the dynamics of erasing a DC space-charge field was also studied. In addition, by irradiating KTa1-xNbxO3:Cu crystal with one of the writing beams under an applied electric field before writing, the influence of the formation of DC space-charge field on the diffraction intensity was investigated.
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[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese]. Further studies of DC space-charge field in KTa1-xNbxO3:Cu crystals[J]. Acta Optica Sinica, 1993, 13(5): 461