[1] Deng Yangbao, Deng Shuguang, Xiong Cuixiu, et al. Measurement of spatiotemporal characteristics of femtosecondlaser pulses by a modified single-shot autocorrelation [J]. Journal of Southeast University (English Edition), 2014, 30 (4): 411-415. [doi:10.3969/j.issn.1003-7985.2014.04.002]

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Measurement of spatiotemporal characteristics of femtosecondlaser pulses by a modified single-shot autocorrelation()

基于改进的单次自相关测量飞秒激光脉冲的时空特性

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

30

Issue:

2014 4

Page:

411-415

Research Field:

Electronic Science and Engineering

Publishing date:

2014-12-31

Info

Title:

Measurement of spatiotemporal characteristics of femtosecondlaser pulses by a modified single-shot autocorrelation

基于改进的单次自相关测量飞秒激光脉冲的时空特性

Author(s):

Deng Yangbao¹;  2;  Deng Shuguang²;  Xiong Cuixiu²;  Zhang Guangfu²;  Tian Ye²;  Shen Lianfeng¹

¹National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China
²College of Communication and Electronic Engineering, Hunan City University, Yiyang 413000, China

邓杨保¹;  2;  邓曙光²;  熊翠秀²;  张光富²;  田野²;  沈连丰¹

¹东南大学移动通信国家重点实验室, 南京 210096; ²湖南城市学院通信与电子工程学院, 益阳 413000

Keywords:

spatiotemporal characteristics;  modified single-shot autocorrelation;  femtosecond laser pulses;  ultrafast laser technology

时空特性;  改进的单次自相关;  飞秒激光脉冲;  超快激光技术

PACS:

TN2

DOI:

10.3969/j.issn.1003-7985.2014.04.002

Abstract:

To overcome the shortcomings of the single-shot autocorrelation(SSA)where only one pulse width is obtained when the SSA is applied to measure the pulse width of ultrashort laser pulses, a modified SSA for measuring the spatiotemporal characteristics of ultrashort laser pulses at different spatial positions is proposed. The spatiotemporal characteristics of femtosecond laser pulses output from the Ti:sapphire regenerative amplifier system are experimentally measured by the proposed method. It was found that the complex spatial characteristics are measured accurately. The pulse widths at different spatial positions are various, which obey the Gaussian distribution. The pulse width at the same spatial position becomes narrow with the increase in input average power when femtosecond laser pulses pass through a carbon disulfide(CS₂)nonlinear medium. The experimental results verify that the proposed method is valid for measuring the spatiotemporal characteristics of ultrashort laser pulses at different spatial positions.

针对单次自相关方法只能测量一个脉宽的缺点, 提出一种改进的单次相关方法测量超短激光脉冲全空域中不同空间位置的时空特性.通过实验测量了钛宝石激光器输出飞秒激光脉冲的时空特性, 结果表明飞秒激光脉冲全空域中不同位置的复杂空间特性得以精密测量;不同空间位置的时间脉宽不同, 它们服从高斯分布;当飞秒激光脉冲经过二硫化碳非线性介质传输后, 随着输入平均功率的增加, 同一空间位置的时间脉宽呈现慢慢变窄的趋势.实验结果验证了所提方法可以有效地测量超短激光脉冲全空域中不同空间位置的时空特性.

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Memo

Memo:

Biographies: Deng Yangbao(1983—), male, doctor, lecturer; Shen Lianfeng(corresponding author), male, professor, lfshen@seu.edu.cn.
Foundation items: The National Natural Science Foundation of China(No.61171081, No.61471164), the Natural Science Foundation of Hunan Province(No.14JJ6043).
Citation: Deng Yangbao, Deng Shuguang, Xiong Cuixiu, et al.Measurement of spatiotemporal characteristics of femtosecond laser pulses by a modified single-shot autocorrelation[J].Journal of Southeast University(English Edition), 2014, 30(4):411-415.[doi:10.3969/j.issn.1003-7985.2014.04.002]

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