低功率近红外光的偏振方向对光致折射率变化影响的实验研究

陈宝东; 温静

光子学报, 2010, 39 (3): 403, 网络出版: 2010-05-24

低功率近红外光的偏振方向对光致折射率变化影响的实验研究

Experiment Research for the Influence of Polarization Direction of Low-power Near-infrared Light on the Light-induced Refractive Index Change

论文大纲

陈宝东 ^1,*温静 ²

作者单位

¹ 内蒙古工业大学材料科学与工程学院,材料工程与设计研究所,呼和浩特 010051

² 内蒙古化工职业学院南校区继续教育部,呼和浩特 010010

近红外光偏振方向光折变效应 In:Fe:LiNbO3晶体 near infrared light polarization direction light-induced refractive index change In:Fe:LiNbO3 crystal

摘要

研究了利用低功率近红外光辐照In:Fe:LiNbO3晶体时写入光束的偏振方向对光致折射率变化(Δn)的影响.分别采用正常偏振(o光)和非常偏振(e光)的近红外细激光束，在In:Fe:LiNbO3晶体中进行了光折变实验.研究表明，两种偏振方向引起晶体的Δn实测曲线相似，但变化规律恰好相反，o光引起的折射率变化量约是e光的3倍左右.近红外光写入下两种偏振光束引起晶体的Δn分布规律都不同于可见光，尤其是e光辐照区域中心晶体的折射率升高.因此，通过选择不同偏振方向的近红外光可以在光折变晶体中制作不同折射率分布的非线性光学器件.

Abstract

The influence of the polarization direction of light-induced refractive index change(Δn) induced by light irradiation in In:Fe:LiNbO3 crystals were investigated by using ordinary and extraordinary recording polarization(opol/epol) laser beams of low-power near infrared light.The experimental results show that the curves are similar of the refractive index distribution,but they have opposite signs,and a further difference is that the saturation refractive index change is clearly larger for ordinary recording polarization,changing to extraordinary recording polarization result only about one-third.The refractive index change in photorefractive crystals induced by two polarization directions of near infrared light is differ from visible light.The crystal illuminated with extraordinary polarized light in the middle of the irradiation region,one can see a strong increased of the refractive index.Moreover,the results can be very useful for fabrication of tailored nonlinear optical device with different refractive index distributions by changing different the polarization directions of near infrared beam.

参考文献

[1] . Holographic storage in lithium niobate[J]. Appl Phys Lett, 1968, 13(7): 223-225.

[2] . Optical index damage in LiNbO3 and other pyroelectric insulators[J]. Appl Phys Lett, 1970, 41(8): 3279-3285.

[3] . Propagation of an optical beam in a photorefractive medium in the presence of a photogalvanic nonlinearity or an externally applied electric field[J]. Phys Rev A, 1995, 51(2): 1520-1523.

[4] . Two-dimensional visualization of photoinduced refractive index change in photorefractive lithium niobate crystal[J]. Jpn J Appl Phys, 1998, 37: 225-227.

[5] . Low-spatial-frequency refractive-index changes in iron-doped lithium niobate crystals upon illumination with a focused continuous-wave laser beam[J]. Opt Soc Am B, 2000, 17: 586-592.

[6] . Waveguides written and stored by photovoltaic dark spatial solitons in LiNbO3:Fe crystals[J]. Chin Phys Lett, 1996, 13(10): 737-740.

[7] . LiNbO3:Fe晶体中光写入波导时折射率的变化规律[J]. 物理学报, 2003, 52(05): 1179-1183.

. The index change s of waveguide s fabricated by light irradiation in LiNbO3:Fe crystals[J]. Acta Phys Sini, 2003, 52(05): 1179-1183.

[8] . (2+1)维光折变波导阵列制作[J]. 光子学报, 2002, 31(10): 1200-1204.

. Fabrication of (2+1) dimensional photorefractive waveguides array[J]. Acta Photonica Sinica, 2002, 31(10): 1200-1204.

[9] 张鹏,刘骞,任煜轩,等.SBN:Cr晶体中孤子诱导的实时平面光波导及其导光特性分析［J］.光子学报,2008,37(5):935-939.

ZHANG Peng,LIU Qian,REN Yu-xuan,et al.Soliton-induced real-time planar waveguide and its guiding property in SBN:Cr crystal［J］.Acta Photonica Sinica,2008,37(5):935-939.

[10] . Optical spatial solitons and their interactions:universality and diversity[J]. Science, 1999, 286(5444): 1518-1523.

[11] . Fabrication of two-dimensional array of photorefractive waveguides[J]. SPIE, 1996, 2778: 527-528.

[12] . LiNbO3:Fe晶体中光写入平面光波导的导光特性研究[J]. 物理学报, 2004, 53(10): 3369-3374.

. The index changes of waveguides fabricated by light irradiation in LiNbO3:Fe crystals[J]. Acta Phys Sin, 2004, 53(10): 3369-3374.

[13] 谈振兴,于天宝,方利广,等.超微光子晶体多模干涉型滤波器的设计与优化［J］.光子学报,2009,38(3):592-596.

TAN Zhen-xing,YU Tian-bao,FAN G Li-guang,et al.Design and optimization of ultracompact multimode Interference-based photonic crystal filter ［J］.Acta Photonica Sinica,2009,38(3):592-596.

[14] 刘思敏,郭儒,许京军.光折变非线性光学及其应用(M).北京:科学出版社,2004:26-36.

LIU Si-min,GUO Ru,XU Jing-jun.Photorefractive nonlinear optics and application(M).Beijing:Science Press,2004,26 -36.

[15] . Photorefractive effect in iron-doped lithium niobate crystals induced by femtosecond pulses of 1.5 μm wavelength[J]. Appl Phys Lett, 2006, 88: 051120.

[16] 陈宝东,杨立森,温静,等.红外弱光诱导掺铟铁铌酸锂晶体的光折变效应［J］.红外与毫米波学报,2008,27(4):241-246.

CHEN Bao-dong,YANG Li-sen,WEN Jing,et al.Photorefractive effect induced by low-power infrared light in indium and iron-doped lithium niobate crystals ［J］.J Infrared Millim Waves,2008,27(4):241-246.

[17] 赵建林,李碧丽,杨德兴,等.LiNbO3:Fe晶体中光写入阵列平面光波导的实验实现［J］.光子学报,2003,32(4):421-424.

ZHAO Jian-lin,LI Bi-li,YANG De-xing,et al.Experiment of light writing planar waveguides array in LiNbO3:Fe crystal ［J］.Acta Photonica Sinica,2003,32(4):421-424.

[18] 秦秉坤,孙雨南.介质光波导及其应用(M).北京:北京理工大学出版社,2004:185-187.

QIN Bing-Kun,SUN Yu-nan.Dielectric optical waveguide and applications(M).Beijing:Beijing Institute of Technology Press,2004:185-187.

陈宝东, 温静. 低功率近红外光的偏振方向对光致折射率变化影响的实验研究[J]. 光子学报, 2010, 39(3): 403. CHEN Bao-dong, WEN Jing. Experiment Research for the Influence of Polarization Direction of Low-power Near-infrared Light on the Light-induced Refractive Index Change[J]. ACTA PHOTONICA SINICA, 2010, 39(3): 403.

低功率近红外光的偏振方向对光致折射率变化影响的实验研究

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