Terahertz spectrum analyzer based on a terahertz frequency comb
Terahertz spectrum analyzer based on a terahertz frequency comb
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DOI：
10.1364/oe.16.013052
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发表时间：
2008-08-18
期刊：
影响因子：
3.8
通讯作者：
Yasui, Takeshi
中科院分区：
文献类型：
--
作者：
Yokoyama, Shuko;Nakamura, Ryotaro;Yasui, Takeshi
太赫兹（THz）波的精确频率测量需要建立太赫兹光谱区域的计量学。然而，该地区的频率测量技术还不成熟。我们提出了一个太赫兹频谱分析仪测量的绝对频率和频谱形状的连续波太赫兹波。利用光电导天线产生的稳定频率梳，对亚太赫兹测试源的绝对频率进行了测量，测量精度为2.8 × 10 ~（-11）。此外，太赫兹频谱分析仪的光谱带宽可以扩展到超过1太赫兹，通过太赫兹测试源的测量证明。这种频谱分析仪有可能成为一个强大的工具，太赫兹频率计量。(C)2008年美国光学学会。
Precision frequency measurements of terahertz (THz) waves are required to establish metrology in the THz spectral region. However, frequency measurement techniques in this region are immature. We propose a THz spectrum analyzer to measure the absolute frequency and spectral shape of continuous-wave THz waves. Based on a stable frequency comb generated in a photoconductive antenna, the absolute frequency of a sub-THz test source was determined at a precision of 2.8x10(-11). Furthermore, the spectral bandwidth of the THz spectrum analyzer can be extended over 1 THz, as demonstrated by measurement of a THz test source. This spectrum analyzer has the potential to become a powerful tool for THz frequency metrology. (C) 2008 Optical Society of America.