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采用有限元法对实验室自制的非线性微结构光纤进行理论分析, 表明该光纤具有良好的非线性和色散波产生的相位匹配特性. 为实现微结构光纤非线性的全光纤化, 本实验采用中心波长为1032 nm的光纤飞秒激光器作为抽运源, 获得了753–789 nm 的近红外色散波. 实验中发现色散波中心波长和带宽随着抽运功率的改变会产生明显变化, 并且在不同光纤长度时, 色散波的频移量不同, 脉冲展宽及频谱也会有明显的变化. 实验结果与理论分析一致. 这些结果对实现微结构光纤非线性的全光纤化具有良好的借鉴作用, 为生物医疗应用特别是非线性光学显微成像术的近红外光源研究打下基础.Properties of nonlinear microstructured fiber fabricated in our laboratory are theoretically analyzed using the finite element method. This fiber has a high nonlinearity and phase matching for the dispersion wave generation. To achieve all-fiber nonlinearity in microstructured fiber, the dependence of dispersion wave on the pump power is investigated. When changing the pump power at 1032 nm with a femtosecond fiber laser, the near-infrared dispersion waves cover a region from 753 to 789 nm. The central wavelength and bandwidths alter obviously, and the fiber length has a remarkable impact on pulse broadening and frequency spectrum. Results coincide with the analyses. These results could be a reference for all-fiber nonlinearity of microstructured fiber, and lay a foundation for biological and medical applications, especially some researches on the near-infrared source for nonlinear light microscopy.
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Keywords:
- microstructure fiber /
- dispersion wave /
- nonlinearity /
- near-infrared
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[1] Russell P ST J 2003 Science 299 5605
[2] Knight J C 2003 Nature 424 01940
[3] Yuan J H, Sang X Z, Wu Q, Yu C X, Farrell G 2013 Laser Phys. Lett. 10 045405
[4] Yuan J H, Sang X Z, Wu Q, Yu C X, Shen X W, Wang K R, Yan B B, Han Y, Zhou G Y, Semenova Y, Farrell G, Hou L T 2013 Opt. Commun. 291 317
[5] Shen X W, Yu C X, Sang X Z, Yuan J H, Han Y, Xia C M, Hou L T, Rao L, Xia M, Yin X L 2012 Acta Phys. Sin. 61 044203 (in Chinese) [申向伟, 余重秀, 桑新柱, 苑金辉, 韩颖, 夏长明, 侯蓝田, 饶岚, 夏民, 尹霄丽 2012 61 044203]
[6] Liu X X, Wang S T, Zhao X T, Chen S, Zhou G Y, Wu X J, Li S G, Hou L T 2014 Spectrosc. Spectral Analy. 34 1460 (in Chinese) [刘晓旭, 王书涛, 赵兴涛, 陈爽, 周桂耀, 吴希军, 李曙光, 侯蓝田 2014 光谱学与光谱分析 34 1460]
[7] Pureur V, Dudley J M 2011 Opt. Commun. 284 1661
[8] Wang W B, Yang H, Tang P H, Han F 2013 Acta Phys. Sin. 62 184202 (in Chinese) [王威彬, 杨华, 唐平华, 韩芳 2013 62 184202]
[9] Zhao X T, Zheng Y, Liu Z L, Li S G, Hou L T 2012 Acta Phys. Sin. 61 194210 (in Chinese) [赵兴涛, 郑义, 刘晓旭, 刘兆伦, 李曙光, 侯蓝田 2012 61 194210]
[10] Shen X W, Yuan J H, Sang X Z, Yu C X, Rao L, Xia M, Han Y, Xia C M, Hou L T 2012 Chin. Phys. B 21 114102
[11] Liu X M, Lægsgaard J, Møller U, Tu H H, Boppart S A, Turchinovich D 2012 Opt. Lett. 37 2769
[12] Zhao X T, Zheng Y, Han Y, Zhou G Y, Hou Z Y, Shen J P, Wang C, Hou L T 2013 Acta Phys. Sin. 62 064215 (in Chinese) [赵兴涛, 郑义, 韩颖, 周桂耀, 侯峙云, 沈建平, 王春, 侯蓝田 2013 62 064215]
[13] Horton N G, Wang K, Kobat D, Clark C G, Wise F W, Schaffer C B, Xu C 2013 Nat. Photonics 7 205
[14] Wang M, Li C Y, Sun Y F, Li M, Zhai X M, Wu D M 2013 Acta. Opt. Sin. 33 0617003 (in Chinese) [王懋, 李春炎, 孙云飞, 李敏, 翟晓敏, 吴东岷 2013 光学学报 33 0617003]
[15] Chen Y P, Li C B, Wang X L, Chu Q W, Long Z D 2014 J. Optoelectronics · Laser 25 1023 (in Chinese) [陈延平, 李纯彬, 王晓玲, 储茜雯, 龙朱蒂 2014 光电子 25 1023]
[16] Chen C B, Zhao M 2012 Organ Tran. 3 283 (in Chinese) [陈传宝, 赵明 2012 器官移植 3 283]
[17] Chan M C, Lien C H, Lu J Y, Lyu B H 2014 Opt. Express 22 9498
[18] Tsai M T, Chan M C 2014 Opt. Lett. 39 865
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