High-resolution time-of-flight terahertz tomography using a femtosecond fiber laser.
High-resolution time-of-flight terahertz tomography using a femtosecond fiber laser.
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DOI：
10.1364/oe.17.007533
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发表时间：
2009-04
期刊：
影响因子：
3.8
通讯作者：
J. Takayanagi;Hiroki Jinno;S. Ichino;K. Suizu;M. Yamashita;T. Ouchi;S. Kasai;H. Ohtake;H. Uchida;N. Nishizawa;K. Kawase
中科院分区：
文献类型：
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作者：
J. Takayanagi;Hiroki Jinno;S. Ichino;K. Suizu;M. Yamashita;T. Ouchi;S. Kasai;H. Ohtake;H. Uchida;N. Nishizawa;K. Kawase
高分辨率层析成像证明使用反射型太赫兹时域光谱。为了实现通用的实用系统，使用了鲁棒的全光纤激光器作为泵浦光源。利用光纤和DAST晶体将光脉冲压缩到17 fs，产生宽带太赫兹波。使用去卷积信号处理，所产生的太赫兹波的宽带光谱提供了高轴向分辨率，从而成功地对包含2微米薄GaAs层的多层结构进行成像。据我们所知，这是第一次演示太赫兹断层成像这样一个薄层。
High-resolution tomographic imaging is demonstrated using a reflection-type terahertz time-domain spectroscopy. To realize a practical system for general use, a robust all-fiber laser was used as the pump light source. Broadband terahertz waves were generated with the combination of optical pulses compressed to 17 fs using optical fibers and a DAST crystal. Using deconvolution signal processing, the wideband spectrum of the generated terahertz waves provided high-axial resolution leading to successful imaging of a multilayered structure containing a 2-microm-thin GaAs layer. To our knowledge, this is the first demonstration of terahertz tomographic imaging of such a thin layer.