用微扰法从理论上计算了外加交变电场的光折变晶体中屏蔽明孤子的自偏转特性,在外加交变电场的有效电场方向与晶轴方向一致的情况下,晶体中形成屏蔽明孤子,其自偏转方向偏向晶轴反方向,并且孤子中心的偏转轨迹为一抛物线,当传播距离为一定值时,其偏转距离与外加交变电场值的三次方、光强调制度分别成正比,当孤子中心光强与暗辐射强度的比值为10时,光孤子的偏转距离最大.伴随自偏转的同时,光孤子中心的空间频率随着传播距离由低频向高频线性移动,导致光孤子的横截面振幅分布发生了变化,偏转方向的曲线斜率变大,反方向的曲线变得平坦.
参考文献
[1] | Zhou Yuanlin,Xie Jinghui,Sun Ping,et al.Selective erasure of photorefractive hologram in Fe:LiNO3 by introducing π phase shift on the reference wave[J].Chinese Journal of Lasers(中国激光),2003,30(8):726-730 (in Chinese). |
[2] | Liu Guodong,He Qingsheng,Li Xiaochun,et al.Suppression and influence of photovoltaie DC field on volume hologram[J].Chinese Journal of Lasers(中国激光),2003,30(8):713-716(in Chinese). |
[3] | Breer S,Buse K.Wavelength demultiplexing with volume phase holograms in potorefractive lithium niobate[J].Appl.Phys.B,1998,66(3):339-345. |
[4] | Dai Cuixia,Liu Liren,Liu Dean,et al.Improvement of sensitivity and refractive-index changes in holographic recording in doubly doped LiNbO3 with UV light[J].Acta Optica Sinica(光学学报), 2005,25(12):1600-1605 (in Chinese). |
[5] | Duree G,Shultz J L,Salamo G,et al.Observation of self-trapping of an optical beam due to the photorefractive effect[J].Phys.Rev.Lett.,1993,71(4):533-536. |
[6] | Segev M,Crosignani B,Yariv A,et al.Spatial solitons in photorefractive media[J].Phys.Rev.Lett.,1992,68(7):923-926. |
[7] | Christodoulides D N,Carvalho M I.Compression,self-bending,and collapse of Gaussian beams in photorefractive crystals[J].Opt.Lett.,1994,19(21):1714-1716. |
[8] | Liu Jinsong,Lu Keqing.Screening-photovoltaic spatial solitons in biased photovoltaic-photorefractive crystals and their self-deflection[J].J.Opt.Soc.Am.B,1999,16(4):550-555. |
[9] | Vysloukh V A,Kutuzov V,Petnikova V M,et al. Formation of spatial solitons and spatial shock waves in photorefractive crystals[J].J.Exp.Theor.Phys.,1997,84(2):388-394. |
[10] | Iturbe C,Marquez A,Sanchez M,et al.Spatial solitons in photorefractive Bi12TiO20 with drift mechanism of nonlinearity[J].Appl.Phys.Lett.,1994,64(4),408-410. |
[11] | Anikeev V V,Bol'shakov M V,et al.Trudy konferentsii ' Fundamental' nye problemy optiki'[C].Proceedings of Conference on Fundamental Problems of Optics,2000,130. |
[12] | Frolova M N,Shandarov S M,Borodin M V.Self-action of a light beam in a photorefractive crystal in an alternating electric field upon synchronous intensity modulation[J].Quantum Electron.,2002,32(1):45-48. |
[13] | Kukhtarev V,Markov V B,Oduloc S G,et al.Holographic storage in electrooptic crystal:Ⅰ.steady state[J].Ferroeletrics,1979,22(3-4):949-960. |
[14] | Stepanov S I,Petrov M P.Efficient unstationary holographic recording in photorefractive crystals under an external alternating electric field[J].Opt.Commun.,1985,53(5):292-295. |
[15] | Shandarov S M,Nazhestkina N I,Kobozev O V,et al.Nonlinearity of a response in photorefractive crystals with a square-wave applied field[J].Appl.Phys.B,1999,68(5):1007-1012. |
[16] | Asselborn S A,Kundikova N D,Novikov I V.Experimental study of the self-deflection of a light beam in a photorefractive crystal exposed to an external alternating electric field[J].Tech.Phys.Lett.,2008,34(2):159-162. |
[17] | Haken U,Hundhausen M,Ley L.Analysis of the moving-photocarrier-grating technique for the determination of mobility and lifetime of photocarriers in semiconductors[J].Phys.Rev.B,1995,51(16):10579-10590. |
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