Terahertz-bandwidth high-order temporal differentiators based on phase-shifted long-period fiber gratings.
Terahertz-bandwidth high-order temporal differentiators based on phase-shifted long-period fiber gratings.
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DOI：
10.1364/ol.34.003116
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发表时间：
2009-10
期刊：
影响因子：
3.6
通讯作者：
R. Slavík;Yongwoo Park;M. Kulishov;J. Azaña
中科院分区：
文献类型：
--
作者：
R. Slavík;Yongwoo Park;M. Kulishov;J. Azaña
我们报告了能够用作太赫兹带宽二阶时间微分器的 pi 相移长周期光纤光栅（LPFG）的制造。我们通过区分亚皮秒长光脉冲来实验演示其操作。还提出并演示了一种基于 LPFG 滤波器实现高阶光子时间微分的新方案。特别是，我们准备了一个基于 LPFG 的一阶微分器，其频率和带宽与二阶器件匹配，并演示了这些器件的级联性，从而实现了三阶微分器。通过在反射中也使用这些设备，实验证明了高达五阶微分。
We report the fabrication of a pi-phase-shifted long-period fiber grating (LPFG) capable of operating as a terahertz-bandwidth second-order temporal differentiator. We demonstrate its operation experimentally by differentiating subpicosecond long optical pulses. A new scheme for achieving high-order photonic temporal differentiation based on LPFG filters is also proposed and demonstrated. In particular, we prepared a LPFG-based first-order differentiator that was frequency and bandwidth matched to the second-order device and demonstrated the cascadability of these devices leading to the implementation of a third-order differentiator. By also employing these devices in reflection, up to the fifth-order differentiation is demonstrated experimentally.