飞秒激光在锥形镀膜探针传输中相位奇异的研究?

物理学报

飞秒激光在锥形镀膜探针传输中相位奇异的研究?

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刘桂媛, 宋洪胜, 张宁玉, 程传福. 2015: 飞秒激光在锥形镀膜探针传输中相位奇异的研究?, 物理学报, null(2): 24203. doi: 10.7498/aps.64.024203

引用本文:

刘桂媛, 宋洪胜, 张宁玉, 程传福. 2015: 飞秒激光在锥形镀膜探针传输中相位奇异的研究?, 物理学报, null(2): 24203. doi: 10.7498/aps.64.024203

Liu Gui-Yuan, Song Hong-Sheng, Zhang Ning-Yu, Cheng Chuan-Fu. 2015: Phase singularities in femtosecond laser pulses transmitting through optical fib er prob es, Acta Physica Sinica, null(2): 24203. doi: 10.7498/aps.64.024203

Citation:

Liu Gui-Yuan, Song Hong-Sheng, Zhang Ning-Yu, Cheng Chuan-Fu. 2015: Phase singularities in femtosecond laser pulses transmitting through optical fib er prob es, Acta Physica Sinica, null(2): 24203. doi: 10.7498/aps.64.024203

飞秒激光在锥形镀膜探针传输中相位奇异的研究?

山东建筑大学理学院,济南,250101
山东师范大学物理与电子科学学院,济南,250014

Phase singularities in femtosecond laser pulses transmitting through optical fib er prob es

摘要: 利用数值模拟的方法对飞秒激光脉冲中光波振荡一个周期内不同时刻的光场进行了计算、比较，获得了输出端平面内各空间点处光场的最大值及达到最大值时对应的时间，得到了探针近场的振幅和相位分布。在研究振幅分布的过程中发现，在探针输出端的有些区域振幅始终为零，即在光波振荡的一个周期内这些区域始终为相位奇异点；通过分析相位分布得到了相位奇异随时间的演化及相位奇异的特点。
- 时域有限差分法 /
- 飞秒激光脉冲 /
- 光纤探针 /
- 相位奇异
Abstract: The near-field distribution of a light wave in a metal-coated optical fiber probe under the illumination of femtosecond laser pulses is numerically simulated. By choosing the maximum of the calculated light field data and the time when the light field reaches the maximum in a time period of one light wave cycle at each spatial point, we obtain the amplitude and phase distributions of the light field near the probe. We find that the output amplitude distribution of y-polarization has roughly a circled-cross-like pattern with two arc-like zero-amplitude zones. The zeros of light intensity are the phase singularities at which the phase is undefined. By analyzing the output phase distribution of y-polarization, we obtain the temporal evolution of the phase singularities and their characteristics.

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飞秒激光在锥形镀膜探针传输中相位奇异的研究?

山东建筑大学理学院,济南,250101
山东师范大学物理与电子科学学院,济南,250014

关键词:

摘要: 利用数值模拟的方法对飞秒激光脉冲中光波振荡一个周期内不同时刻的光场进行了计算、比较，获得了输出端平面内各空间点处光场的最大值及达到最大值时对应的时间，得到了探针近场的振幅和相位分布。在研究振幅分布的过程中发现，在探针输出端的有些区域振幅始终为零，即在光波振荡的一个周期内这些区域始终为相位奇异点；通过分析相位分布得到了相位奇异随时间的演化及相位奇异的特点。

English Abstract

Phase singularities in femtosecond laser pulses transmitting through optical fib er prob es

山东建筑大学理学院,济南,250101
山东师范大学物理与电子科学学院,济南,250014

Keywords:

Abstract: The near-field distribution of a light wave in a metal-coated optical fiber probe under the illumination of femtosecond laser pulses is numerically simulated. By choosing the maximum of the calculated light field data and the time when the light field reaches the maximum in a time period of one light wave cycle at each spatial point, we obtain the amplitude and phase distributions of the light field near the probe. We find that the output amplitude distribution of y-polarization has roughly a circled-cross-like pattern with two arc-like zero-amplitude zones. The zeros of light intensity are the phase singularities at which the phase is undefined. By analyzing the output phase distribution of y-polarization, we obtain the temporal evolution of the phase singularities and their characteristics.

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