LiNbO<sub>3</sub>:Fe晶体中飞秒二波耦合光栅衍射自增强现象

王铁铮; 吴强; 王振华; 张心正; 许京军

中国激光, 2006, 33 (7): 918, 网络出版: 2006-08-08

LiNbO₃:Fe晶体中飞秒二波耦合光栅衍射自增强现象

Diffraction Self-Enhancement by Two Wave Mixing of Femtosecond Pulse in LiNbO₃:Fe

论文大纲

王铁铮 ^*吴强王振华张心正许京军

作者单位

南开大学泰达学院应用物理学院超快光子学实验室, 天津 300457

非线性光学自增强飞秒二波耦合衍射效率 nonlinear optics self-enhancement two wave mixing of femtosecond pulse diffraction efficiency

摘要

在超快二波耦合配置下的LiNbO3:Fe晶体中写入了体相位栅,通过一定的脉冲写入方法进行飞秒脉冲写入光栅的衍射自增强实验,在双光写入饱和后进行单写入光照射,产生了持续1 h的衍射自增强,同时又发现在光栅写入未饱和的时候改为单光写入也产生了衍射自增强现象,持续2 h。随后从光调制角度分析了该自增强现象的理论原因：脉冲衍射光和写入光共同作用,提高了二者耦合程度,写入了新光栅,从而加强原光栅,导致衍射效率提高,从而证明飞秒脉冲写入光栅的读出擦除可抑制,这对提高光全息记录的读出质量有正面意义。

Abstract

Writing a grating by femtosecond coherent pulses, there was an erasure of grating during the reading process, so it is important for research a self-enhancement method to restrain the erasure. In the configuration of femtosecond two waves mixing, two pulses wrote a grating in a LiNbO3:Fe, there was a self-enhancement effect by using a special method that controlled the sequence of femtosecond pulse′s writing: after the two pulse′s writing, single pulse wrote the old grating which made the self-enhancement continue 1 h. At the same time the other self-enhancement effect had been found when the grating was unsaturated and the input two pulses changed to a single pulse, and this self-enhancement continued 2 h. Then the research on the relationship between the writing ultrafast pulse and the writing time had been done, finally the reason analysis had been done with the modulation of femtosecond pulse. This study showed that the diffracted pulse light interacting with writing pulse increased the level of mixing, then a new grating had been written, which boosted up the old one, so that diffraction efficiency increased. The experiment proved that the grating erasure written by femtosecond pulse can be restrained, which was good news for a reading effect of hologram writing.

参考文献

[1] Xu Xinguang, Xu Guibao, Hu Dawei et al.. Photorefractive holographic storage properties in Ce:Fe-doped LiNbO3 crystals [J]. Acta Optica Sinica, 2004, 24(7):947～952
许心光,许贵宝,胡大伟等. 掺Ce,Fe系列LiNbO3晶体光折变效应光存储特性[J]. 光学学报, 2004, 24(7):947～952

[2] . A. Rakuljic. Prescription for long-lifetime, high-diffraction-efficiency fixed holograms in Fe-doped LiNbO3[J]. Opt. Lett., 1997, 22(11): 825-827.

[3] . Yariv, S. S. Orlov, G. A. Rakuljic. Holographic storage dynamics in lithium niobate:theory and experiment[J]. J. Opt. Soc. Am. B, 1996, 13(11): 2513-2523.

[4] Yu Jian, Ni Wenjun, Li Shichen et al.. Quasi-phase-matched frequency doubling blue light generation in LiNbO3 [J]. Acta Optica Sinica, 2000, 20(3):410～413
于建,倪文俊,李世忱等. 准相位匹配LiNbO3蓝光倍频器的研究[J]. 光学学报, 2000, 20(3):410～413

[5] Li Chun, An Yuying, Zeng Xiaodong. LiNbO3 electrooptic tuning optical parametric oscillator [J]. Acta Optica Sinica, 2004, 24(2):172～174
李春,安毓英,曾晓东. LiNbO3电光调谐光学参变振荡器[J]. 光学学报, 2004, 24(2):172～174

[6] . P. Yang, K. Buse, D. Psaltis. Photorefractive recording in LiNbO3:Mn[J]. Opt. Lett., 2002, 27(3): 158-160.

[7] . K. Gaylord, T. A. Rabson, F. K. Tittle et al.. Self-enhancement of LiNbO3 holograms[J]. J. Appl. Phys., 1973, 44(2): 896-897.

[8] . Reinfelde, O. Salminen, P. Ketolainen. Relaxation of elementary holographic gratings in As2S3 films at low diffraction efficiencies[J]. Opt. Lett., 1992, 17(15): 1085-1086.

[9] . Ozols, O. Salminen. Relaxational self-enhancement of holographic gratings in amorphous As2S3 films[J]. J. Appl. Phys., 1994, 75(7): 3326-3334.

[10] . Self-enhancement of holographic gratings in dichromated gelatin and polyvinyl alcohol films[J]. Appl. Opt., 1998, 37(28): 6623-6626.

[11] Song Xuehua, Tao Shiquan, Jiang Zhuqing et al.. Study on thermal fixing process of holograms in photorefractive crystals [J]. Chinese J. Lasers, 2001, A28(1):59～62
宋雪华,陶世荃,江竹青等. 光折变晶体中全息图的热固定过程研究[J]. 中国激光, 2001, A28(1):59～62

[12] Wu Qiang. Study on nonlinear optical effects with weak light and their applications [D]. Tianjin: Nankai University, 2005, 4:60～75
吴强. 若干弱光非线性光学效应及其应用的研究[D]. 天津：南开大学, 2005, 4:60～75

[13] Gao Xuesong, Gao Chunqing, Yang Shaozhuang et al.. Experimental study on beam parameter measurement system by using area array CCD [J]. Chinese J. Lasers, 2005, 32(7):993～996
高雪松,高春清,杨绍状等. 面阵CCD激光束参量测量系统及其实验研究[J]. 中国激光, 2005, 32(7):993～996

[14] . . Optical self-enhancement effect and the improvement of the refraction efficiency[J]. Acta Phisica Sinica, 1991, 40(9): 1443-1447.

王铁铮, 吴强, 王振华, 张心正, 许京军. LiNbO₃:Fe晶体中飞秒二波耦合光栅衍射自增强现象[J]. 中国激光, 2006, 33(7): 918. 王铁铮, 吴强, 王振华, 张心正, 许京军. Diffraction Self-Enhancement by Two Wave Mixing of Femtosecond Pulse in LiNbO₃:Fe[J]. Chinese Journal of Lasers, 2006, 33(7): 918.

LiNbO₃:Fe晶体中飞秒二波耦合光栅衍射自增强现象

关于本站 Cookie 的使用提示

全站搜索

LiNbO3:Fe晶体中飞秒二波耦合光栅衍射自增强现象

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索

LiNbO₃:Fe晶体中飞秒二波耦合光栅衍射自增强现象