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皮秒抽运的参量荧光的时间相干性

Temporal Coherence of Parametric Fluorescence Pumped by Picosecond Pulses

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摘要

在理论和实验上, 分析了皮秒激光脉冲抽运所产生的参量荧光的时间相干特性。通过引入二阶复相干度, 理论研究了在信号光与闲频光群速度走离存在的条件下, 抽运功率和抽运脉宽对参量荧光时间相干性的影响。计算结果表明适当的抽运功率和较短的抽运脉宽是提升参量荧光时间相干性的重要条件, 而过高的抽运功率或者较宽的抽运脉宽则会降低参量荧光的时间相干性。利用周期极化铌酸锂晶体, 在实验上对理论结果进行了初步的实验验证。

Abstract

Both numerically and experimentally, the temporal coherence of parametric fluorescence pumped by picosecond laser is studied. The influence of pump power and pump pulse width on temporal coherence of parametric fluorescence is investigated using the two-time mutual coherence function in the presence of walk-off between the signal and idle. The numerical simulations show that a suitable pump power and a relatively short pump pulse width are very important to increase the temporal coherence of optical parametric fluorescence while a too high pump power or a relatively long pump pulse width can reduce the temporal coherence. Using the periodically poled lithium niobate crystal, the theoretical result is preliminarily proved experimentally.

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中图分类号:O437.4

DOI:10.3788/cjl201845.0708001

所属栏目:非线性光学

收稿日期:2018-01-12

修改稿日期:2018-02-15

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作者单位    点击查看

周南:中国工程物理研究院上海激光等离子体研究所, 上海 201800
李大为:中国科学院上海光学精密机械研究所高功率激光物理联合实验室, 上海 201800
崔勇:中国工程物理研究院上海激光等离子体研究所, 上海 201800
徐光:中国科学院上海光学精密机械研究所高功率激光物理联合实验室, 上海 201800
王韬:中国工程物理研究院上海激光等离子体研究所, 上海 201800

联系人作者:王韬(twang@siom.ac.cn)

备注:周南(1993-), 男, 硕士研究生, 主要从事超短脉冲激光技术方面的研究。E-mail: zn0321@soxmail.com

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引用该论文

Zhou Nan,Li Dawei,Cui Yong,Xu Guang,Wang Tao. Temporal Coherence of Parametric Fluorescence Pumped by Picosecond Pulses[J]. Chinese Journal of Lasers, 2018, 45(7): 0708001

周南,李大为,崔勇,徐光,王韬. 皮秒抽运的参量荧光的时间相干性[J]. 中国激光, 2018, 45(7): 0708001

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