1 January 1996 Self-reading geometry conjugators with copper-doped photorefractive (K0.5Na0.5)0.2(Sr0.75Ba0.25)0.9Nb2O6 crystals and their applications
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The dependence of the reflectivity on the distance of the spots corresponding to the two incident beams on crystals is measured and analyzed in self-reading geometry conjugators (SRGCS) with Cu-doped single-domain photorefractive (K0.5Na0.5)0.2(Sr0.75Ba0.25)0.9Nb2O6 CrYStals. Double peaks in some dependence are observed and used to investigate the mechanism of SRGCS. The dynamic features of the two phase-conjugate beams and the decrease of the specular reflectivity of the probing beam in SRGCS are observed and analyzed. A bump in the probing beam’s phase-conjugate replica as a result of a short pause of the incident pumping beam is analyzed in terms of the pyroelectric effect and photovoltaic effect. A comparison of results on conjugation fidelity, response rate, and threshold between CAT self-pumped phase conjugators and SRGCS is given. Real-time vertical and horizontal high-pass filtering, real-time double-exposure interferometry, and detection of the blemishes caused by amplitude defects in optical systems are demonstrated experimentally. The corresponding theoretical analyses are also given.
Jingwen Zhang, Xinliang Lu, Liangmin Zhang, Zongshu Shao, Huanchu Chen, Minhua Jiang, "Self-reading geometry conjugators with copper-doped photorefractive (K0.5Na0.5)0.2(Sr0.75Ba0.25)0.9Nb2O6 crystals and their applications," Optical Engineering 35(1), (1 January 1996). https://doi.org/10.1117/1.600877

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