| Original Articles |
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Time-Resolved Femtosecond Degenerate Four-Wave Mixing in LiNbO3:Fe,Mg Crystal |
| WANG Zhen-Hua1,2;ZHANG Xin-Zheng1,2;XU Jing-Jun1,2;WU Qiang1,2;QIAO Hai-Jun1,2;TANG Bai-Quan1,2;RUPP Romano3;KONG Yong-Fa4;CHEN Shao-Lin4;HUANG Zi-Heng4;LI Bing4;LIU Shi-Guo4;ZHANG Ling4 |
| 1Photonics Research Center, Institute of Physical Science, Nankai University, Tianjin 300071
2Ultrafast Photonics Laboratory, Teda Applied Physics School, Nankai University, Tianjin 300457
3Institute of Experimental Physics, Vienna University, A-1090 Wien, Austria
4R&D Center for Photon-Electro Materials, Nankai University, Tianjin 300071 |
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| Cite this article: |
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WANG Zhen-Hua, ZHANG Xin-Zheng, XU Jing-Jun et al 2005 Chin. Phys. Lett. 22 2831-2833 |
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Abstract Forward degenerate four-wave mixing (DFWM) processes are investigated with a femtosecond pulsed laser in lithium niobate crystal doubly-doped with magnesium and iron (LiNbO3:Fe,Mg). The pulse energy dependence reveals a pure third-order nonlinear response, and the third-order nonlinear susceptibility x(3) in the material is evaluated to be 4.96×10-13esu. The time-resolved DFWM process shows a response time of x(3) shorter than 100fs, which is due to the nonresonant electronic nonlinearities. Our results indicate that LiNbO3 crystals have potentials for ultrafast real-time optical processing systems, which require a large and fast x(3) optical nonlinearity.
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| Keywords:
42.65.An
42.70.Nq
78.20.-e
78.47.+p
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Published: 01 November 2005
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| PACS: |
42.65.An
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(Optical susceptibility, hyperpolarizability)
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42.70.Nq
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(Other nonlinear optical materials; photorefractive and semiconductor materials)
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78.20.-e
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(Optical properties of bulk materials and thin films)
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78.47.+p
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