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ID 112339
著者
Hu, Guoqing Beihang University
Mizuguchi, Tatsuya Tokushima University
Zhao, Xin Beihang University
Yang, Yuli Beihang University
Li, Cui Beihang University
Bai, Ming Beihang University
Zheng, Zheng Beihang University|Collaborative Innovation Centre of Geospatial Technology
資料タイプ
学術雑誌論文
抄録
A single, free-running, dual-wavelength mode-locked, erbium-doped fibre laser was exploited to measure the absolute frequency of continuous-wave terahertz (CW-THz) radiation in real time using dual THz combs of photo-carriers (dual PC-THz combs). Two independent mode-locked laser beams with different wavelengths and different repetition frequencies were generated from this laser and were used to generate dual PC-THz combs having different frequency spacings in photoconductive antennae. Based on the dual PC-THz combs, the absolute frequency of CW-THz radiation was determined with a relative precision of 1.2 × 10−9 and a relative accuracy of 1.4 × 10−9 at a sampling rate of 100 Hz. Real-time determination of the absolute frequency of CW-THz radiation varying over a few tens of GHz was also demonstrated. Use of a single dual-wavelength mode-locked fibre laser, in place of dual mode-locked lasers, greatly reduced the size, complexity, and cost of the measurement system while maintaining the real-time capability and high measurement precision.
掲載誌名
Scientific Reports
ISSN
20452322
出版者
Springer Nature
7
開始ページ
42082
発行日
2017-02-10
権利情報
© The Author(s) 2017
This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
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言語
eng
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出版社版
部局
理工学系