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Mechanism transition of self-pumped phase conjugation in KTa1 −xNbxO3:Fe crystals

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Abstract

Mechanism transitions of Self-Pumped Phase Conjugation (SPPC) with wavelength and doping concentration are observed in KTN:Fe (KTa1 −x Nb x O3:Fe with x = 0.48) crystals. The SPPC mechanism in KTN: Fe (0.4 wt. %) crystal transforms from “Stimulated Photorefractive Backscattering and Four-Wave Mixing” (SPB-FWM) to “cat” (or total internal reflection) as the wavelength increases from 514.5 nm to 620 nm. SPPC at 514.5 nm is formed with the “cat” mechanism in a 0.2 wt. % doped KTN:Fe crystal, while with the SPB-FWM mechanism in a 0.4 wt. % doped one. These mechanism transitions are discussed with respect to the dependence of the backscattering gain coefficient of the crystals on wavelength and doping concentration.

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Authors and Affiliations

  1. Institute of Physics, Chinese Academy of Sciences, 100080, Beijing, People's Republic of China

    Y. Lian, H. Gao, S. X. Dou, H. Wang & P. Ye

  2. Institute of Crystal Materials, Shandong University, 250100, Jinan, People's Republic of China

    Q. Guan & J. Wang

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  1. Y. Lian
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  2. H. Gao
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  3. S. X. Dou
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  4. H. Wang
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  5. P. Ye
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  6. Q. Guan
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  7. J. Wang
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Lian, Y., Gao, H., Dou, S.X. et al. Mechanism transition of self-pumped phase conjugation in KTa1 −xNbxO3:Fe crystals. Appl. Phys. B 59, 655–658 (1994). https://doi.org/10.1007/BF01081189

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  • DOI: https://doi.org/10.1007/BF01081189

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