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光学元件上存在的缺陷会对传输光束产生局域振幅和位相调制. 基于衍射理论模型和分步傅里叶算法,模拟分析了高斯光束经过表面有缺陷的非线性介质的传输过程中于介质内及从介质出射后在自由空气的传输特性, 并详细研究了在厚介质前表面有缺陷的情况下,介质中和自由空气中的光强分布演化规律. 研究表明,介质厚度越长、介质的非线性折射率越大,光束整体聚焦越厉害, 聚焦点离介质后表面越近.光束受调制点的位置离中心越近,光束分裂成丝产生的局部光强越大, 且介质表面存在缺陷将使通过的光束在介质后表面处产生一个很大的光强, 相位调制型缺陷产生的这一光强点比振幅调制型缺陷产生的光强点更强.The defects unavoidably existing on the optical component will modulate the phase and the amplitude of the beam propagation in the system. Based on the Fresnel diffractiond and split-step Fourier method, the two-dimensional intensity distributions of the Gaussion beam propagation in the nonlinear medium and the free space are simulated. And the intensity distributions of the beam propagation in the medium and the free space are also studied in the case where there exist defects on the front surface of thick medium. It is shown that the thicker the medium and the lager the nonlinear index of refraction, the stronger the beam focus and the closer to the medium surface the focal position is. The defects on the medium surface will lead to a strong beam intensity near the rear surface of the medium. And the intensity generated by the phase modulated defects is stronger than by the amplitude modulated defects.
[1] Wen S C, Fan D Y 2001 Chinese J. Lasers 28 1066 (in Chinese) [文双春, 范滇元 2001 中国激光 28 1066]
[2] Wen S C, Fan D Y 2001 Acta Opt. Sin. 21 1330 (in Chinese) [文双春, 范滇元 2001 光学学报 21 1330]
[3] Lin X D, Wang X, Li D Y 2002 Chinese J. Lasers 29 418 [林小东, 王逍, 李大义 2002 中国激光 29 418]
[4] Gu Y L, Zhu J Q 2006 Acta Opt. Sin. 26 1734 (in Chinese) [顾亚龙, 朱健强 2006 光学学报 26 1734]
[5] Zhang B, Lü B D 1999 Laser Technol. 23 106 (in Chinese) [张彬, 吕百达 1999 激光技术 23 106]
[6] Fleck J A, Morris J R, Bliss E S 1987 Quantum Electronics 14 353
[7] Wang Y W, Hu Y H, Wen S C 2007 Acta Phys. Sin. 56 5855 (in Chinese) [王友文, 胡勇华, 文双春 2007 物理学报 56 5855]
[8] Wang Y W, Deng J Q, Wen S C 2009 Acta Phys. Sin. 58 1738 (in Chinese) [王友文, 邓剑钦, 文双春 2009 物理学报 58 1738]
[9] Zhou W Y, Tian J G, Zang W P 2002 Acta Phys. Sin. 51 2623 (in Chinese) [周文远, 田建国, 臧维平 2002 物理学报 51 2023]
[10] Zang W P, Tian J G, Zhang G Y 1994 Acta Phys. Sin. 43 476 (in Chinese) [臧维平, 田建国, 张光寅 1994 物理学报 43 476]
[11] Hu P, Chen F L 2005 High Power Laser and Particle Beams 17 961 (in Chinese) [胡鹏, 陈发良 2005 强激光与粒子束 17 961]
[12] Neauport J, Lamaignere L, Bercegol H, Pilon F, Birolleau J C 2005 Opt. Express 13 10163
[13] Mainguy S, Tovena-Pecault I, Le Garrec B 2005 Proc. SPIE 5991 59910G-1-9
[14] Zhou L D, Su J Q, Li P 2011 Acta Phys. Sin. 60 024202 (in Chinese) [周丽丹, 粟敬钦, 李平 2011 物理学报 60 024202]
[15] Bespalov V I, Talanov V I 1966 JETP Lett. 3 307
[16] Xie L P, Su J Q, Jing F 2004 High Power Laser and Particle Beam 16 1001 (in Chinese) [谢良平, 粟敬钦, 景峰 2004 强激光与粒子束 16 1001]
[17] Ye P X 2007 Nonlinear Optical Physics (1) (Beijing: Peking University Press) (in Chinese) [叶佩弦 2007 非线性光学物理 (1) (北京:北京大学出版社)]
[18] He K N, Deng L G 2003 High Power Laser and Particle Beams 15 940 (in Chinese) [何坤娜, 邓罗根 2003 强激光与粒子束 15 940]
[19] Tao H, Zhang G W, Pu J X 2011 Acta Opt. Sin. 31 100411 (in Chinese) [陶华, 张国文, 蒲继雄 2011 光学学报 31 100411]
[20] Dai M K, Xu D Y 1997 Acta Photonica Sinica 17 351 (in Chinese) [戴名奎, 徐德衍 1997 光子学报 17 351]
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[1] Wen S C, Fan D Y 2001 Chinese J. Lasers 28 1066 (in Chinese) [文双春, 范滇元 2001 中国激光 28 1066]
[2] Wen S C, Fan D Y 2001 Acta Opt. Sin. 21 1330 (in Chinese) [文双春, 范滇元 2001 光学学报 21 1330]
[3] Lin X D, Wang X, Li D Y 2002 Chinese J. Lasers 29 418 [林小东, 王逍, 李大义 2002 中国激光 29 418]
[4] Gu Y L, Zhu J Q 2006 Acta Opt. Sin. 26 1734 (in Chinese) [顾亚龙, 朱健强 2006 光学学报 26 1734]
[5] Zhang B, Lü B D 1999 Laser Technol. 23 106 (in Chinese) [张彬, 吕百达 1999 激光技术 23 106]
[6] Fleck J A, Morris J R, Bliss E S 1987 Quantum Electronics 14 353
[7] Wang Y W, Hu Y H, Wen S C 2007 Acta Phys. Sin. 56 5855 (in Chinese) [王友文, 胡勇华, 文双春 2007 物理学报 56 5855]
[8] Wang Y W, Deng J Q, Wen S C 2009 Acta Phys. Sin. 58 1738 (in Chinese) [王友文, 邓剑钦, 文双春 2009 物理学报 58 1738]
[9] Zhou W Y, Tian J G, Zang W P 2002 Acta Phys. Sin. 51 2623 (in Chinese) [周文远, 田建国, 臧维平 2002 物理学报 51 2023]
[10] Zang W P, Tian J G, Zhang G Y 1994 Acta Phys. Sin. 43 476 (in Chinese) [臧维平, 田建国, 张光寅 1994 物理学报 43 476]
[11] Hu P, Chen F L 2005 High Power Laser and Particle Beams 17 961 (in Chinese) [胡鹏, 陈发良 2005 强激光与粒子束 17 961]
[12] Neauport J, Lamaignere L, Bercegol H, Pilon F, Birolleau J C 2005 Opt. Express 13 10163
[13] Mainguy S, Tovena-Pecault I, Le Garrec B 2005 Proc. SPIE 5991 59910G-1-9
[14] Zhou L D, Su J Q, Li P 2011 Acta Phys. Sin. 60 024202 (in Chinese) [周丽丹, 粟敬钦, 李平 2011 物理学报 60 024202]
[15] Bespalov V I, Talanov V I 1966 JETP Lett. 3 307
[16] Xie L P, Su J Q, Jing F 2004 High Power Laser and Particle Beam 16 1001 (in Chinese) [谢良平, 粟敬钦, 景峰 2004 强激光与粒子束 16 1001]
[17] Ye P X 2007 Nonlinear Optical Physics (1) (Beijing: Peking University Press) (in Chinese) [叶佩弦 2007 非线性光学物理 (1) (北京:北京大学出版社)]
[18] He K N, Deng L G 2003 High Power Laser and Particle Beams 15 940 (in Chinese) [何坤娜, 邓罗根 2003 强激光与粒子束 15 940]
[19] Tao H, Zhang G W, Pu J X 2011 Acta Opt. Sin. 31 100411 (in Chinese) [陶华, 张国文, 蒲继雄 2011 光学学报 31 100411]
[20] Dai M K, Xu D Y 1997 Acta Photonica Sinica 17 351 (in Chinese) [戴名奎, 徐德衍 1997 光子学报 17 351]
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