Abstract In this paper the photorefractive sensitivity defined for single-centre holographic recording is modified to adapt two-centre holographic recording. Based on the time analytic solution of Kukhtarev equations for doubly doped crystals, the analytical expression of photorefractive sensitivity is given. For comparison with single-centre holographic recording and summing the electron competition effects between the deeper and shallower traps, an effective electron transport length is proposed, which varies with the intensity ratios of recording light to sensitive light. According to analyses in this paper, the lower photorefractive sensitivity in two-centre holographic recording is mainly due to the lower concentration of unionized dopants in the shallower centre and the lower effective electron transport length.
Received: 19 April 2006
Revised: 16 May 2006
Accepted manuscript online:
Fund: Project supported by
the Special Program for Key Basic Research of the Ministry of Science and
Technology, China (granted No 2002CCA03500).
Cite this article:
Zhou Yu(周煜), Liu Li-Ren(刘立人), Liu De-An(刘德安), Luan Zhu(栾竹), and Yan Ai-Min(闫爱民） The photorefractive sensitivity and the effective electron transport length in two-centre holographic recording 2006 Chinese Physics 15 2977
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