| 超连续谱干涉方法测量古依相移 |
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| 引用本文： | 王之光,曾志男,李儒新,徐至展.超连续谱干涉方法测量古依相移[J].光学学报,2007,27(10):1905-1908. |
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| 作者姓名： | 王之光 曾志男 李儒新 徐至展 |
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| 作者单位： | 中国科学院上海光学精密机械研究所强场激光物理国家重点实验室,上海,201800 |
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| 基金项目： | 国家自然科学基金(60578049)资助课题 |
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| 摘 要： | 利用两束超连续光干涉得到的信号,测量了透镜焦点附近飞秒激光脉冲的古依(Gouy)相移。根据得到的光谱干涉信号,利用傅里叶变换得到相对相位值。激光光束在聚焦透镜后的束腰半径可以由成像方法测得。根据测量得到的激光光束束腰半径,用非线性拟合的方法得到了古依相移曲线,拟合曲线与实验结果符合得非常好。给出了古依相位在焦点前后1 mm区域内的移动量。
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| 关 键 词： | 超快光学 超连续谱 古依相移 光谱干涉 飞秒激光脉冲 |
| 文章编号： | 0253-2239（2007）10-1905-4 |
| 收稿时间： | 2006/12/13 |
| 修稿时间： | 2006-12-13 |
Measurement of Gouy Phase Shift by Supercontinuum Spectral Interference |
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| Wang Zhiguang,Zeng Zhinan,Li Ruxin,Xu Zhizhan.Measurement of Gouy Phase Shift by Supercontinuum Spectral Interference[J].Acta Optica Sinica,2007,27(10):1905-1908. |
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| Authors: | Wang Zhiguang Zeng Zhinan Li Ruxin Xu Zhizhan |
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| Institution: | State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, th Chinese Academy of Sciences, Shanghai 201800 |
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| Abstract: | The spectral interference between two white-light continuum beams is adopted to measure the Gouy phase shift of focused femtosecond laser pulses near the lens focus.From the spectral interference signal,the relative phase is extracted by the Fourier transform method.The beam waist of the laser pulses after the focusing lens is measured by imaging method.According to the beam radius,the curves of nonlinear fitting are drawn,and fit the data of experiments very well.The Gouy phase shift at the positions of 1 mm before and after the focal spot is presented. |
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| Keywords: | ultrafast optics supercontinuum spectrum Gouy phase shift spectral interference femtosecond laser pulses |
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