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利用多层体光栅产生飞秒脉冲串

Generation of Femtosecond Pulse Train by Stratified Volume Holographic Grating

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摘要

利用Kogelnik耦合波方程和传输矩阵法,推导了飞秒脉冲通过透射型多层体光栅(SVHG)衍射的耦合波方程,得到时、频域的衍射场和衍射光强表达式。时域衍射光强的数值模拟结果表明,每一个VHG层提供一个时域衍射脉冲,脉冲波形由该VHG参数决定,如厚度、折射率调制度等,与其他VHG和穿插层的参数无关。穿插层会对置于其左侧的VHG层衍射脉冲产生负时间轴方向的平移,对置于其右侧的VHG层衍射脉冲无影响,因此可以通过改变VHG层和穿插层参数实现可调控的飞秒脉冲串。最后,通过衍射效率和衍射谱表达式解释了产生脉冲串的原因。

Abstract

Based on the Kogelnik′s coupled-wave theory and transfer matrix method, the expressions of temporal and spectral diffracted field and intensity are deduced, while a femtosecond pulse incidents on a transmitted stratified volume holographic grating (SVHG). Simulation results show that, each VHG layer diffracts out a sub-pulse and the waveform of which is modulated by corresponding VHG layer and and buffer layers parameters. The buffer layers placed on VHG′s right side will translate the diffracted sub-pulses along the negative time-axis, whereas the left side will not translate peak position, such property can be used to realize modulated femtosecond pulse train by controlling VHG and buffer layers parameters. At last, an explanation on these phenomena is given based on the diffraction efficiency and expressions of diffracted spectrum.Key words

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中图分类号:TN 248

DOI:10.3788/aos201737.0705001

所属栏目:衍射与光栅

基金项目:国家自然科学基金(11674213,11574195,11274225)、上海市自然科学基金(14ZR1415400)、上海市科委重点项目(14JC1402100)

收稿日期:2017-01-06

修改稿日期:2017-02-20

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阎晓娜:上海大学理学院物理系, 上海 200444
赵嘉渊:上海大学理学院物理系, 上海 200444
陈园园:上海大学理学院物理系, 上海 200444
王 燕:上海大学理学院物理系, 上海 200444
戴 晔:上海大学理学院物理系, 上海 200444

联系人作者:阎晓娜(xnyan@staff.shu.edu.cn)

备注:阎晓娜(1970-),女,博士,副教授,主要从事体光栅衍射及脉冲整形等方面的研究。

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引用该论文

Yan Xiaona,Zhao Jiayuan,Chen Yuanyuan,Wang Yan,Dai Ye. Generation of Femtosecond Pulse Train by Stratified Volume Holographic Grating[J]. Acta Optica Sinica, 2017, 37(7): 0705001

阎晓娜,赵嘉渊,陈园园,王 燕,戴 晔. 利用多层体光栅产生飞秒脉冲串[J]. 光学学报, 2017, 37(7): 0705001

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