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Proceedings Paper

Phase-conjugate characteristics of the terbium-copper-doped potassium sodium strontium barium niobate crystal
Author(s): Xiudong Sun; Yan Li; Zhongxiang Zhou; Yongyuan Jiang
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Paper Abstract

In this paper we demonstrate the phase conjugate characteristics of a Tb:Cu:KNSBN crystal, using the self- pumped phase conjugator, the bridge double phase conjugator and the coherently induced double phase conjugator, respectively. The experimental results show that the Tb:Cu:KNSBN crystal has high 'cat' self-pumped phase conjugate reflectivity, which is 57 percent at incident angle of 40 degrees and input intensity of 7.6 W/cm2, and fast response. For the bridge double phase conjugator, two mutually incoherent e-polarized input beams enter the opposite crystal faces symmetrically with an included angle of 112 degrees. We measured the maximum phase conjugate transmissivity of 65 percent and the maximum phase conjugate reflectivity of higher than 250 percent. Moreover, we found that the temporal phase conjugate output varies with which input beam being blocked before the measurement. A peak reflectivity of as high as 300 percent was obtained when the beam ratio is 6.5. The Tb:Cu:KNSBN crystal has also been used to implement the coherently induced double phase conjugation and phase conjugate reflectivity approximately 320 has been obtained in a very large dynamic range of beam ratios.

Paper Details

Date Published: 17 August 1998
PDF: 5 pages
Proc. SPIE 3554, Photorefractive Materials: Phenomena and Related Applications II, (17 August 1998); doi: 10.1117/12.318136
Show Author Affiliations
Xiudong Sun, Harbin Institute of Technology (China)
Yan Li, Harbin Institute of Technology (China)
Zhongxiang Zhou, Harbin Institute of Technology (China)
Yongyuan Jiang, Harbin Institute of Technology (China)


Published in SPIE Proceedings Vol. 3554:
Photorefractive Materials: Phenomena and Related Applications II
Peixian Ye; Tsutomu Shimura; Ratnakar R. Neurgaonkar, Editor(s)

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