• Advanced Photonics
  • Vol. 2, Issue 3, 036004 (2020)
Jie Chen1、2, Kazuki Nitta2、3, Xin Zhao1, Takahiko Mizuno3、4、5, Takeo Minamikawa3、4、5、6, Francis Hindle7, Zheng Zheng1、8、*, and Takeshi Yasui3、4、5、6、*
Author Affiliations
  • 1Beihang University, School of Electronic and Information Engineering, Beijing, China
  • 2Tokushima University, Graduate School of Advanced Technology and Science, Tokushima, Japan
  • 3JST, ERATO MINOSHIMA Intelligent Optical Synthesizer, Tokushima, Japan
  • 4Tokushima University, Institute of Post-LED Photonics, Tokushima, Japan
  • 5Tokushima University, Graduate School of Technology, Industrial and Social Sciences, Tokushima, Japan
  • 6Tokushima University, Research Cluster on “Multi-scale Vibrational Microscopy for Comprehensive Diagnosis and Treatment of Cancer”, Tokushima, Japan
  • 7Université du Littoral Côte d’Opale, Laboratoire de Physico-Chimie de l’Atmosphère, Dunkerque, France
  • 8Beihang University, Beijing Advanced Innovation Center for Big Data-based Precision Medicine, Beijing, China
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    Dual-comb spectroscopy (DCS) is an emerging spectroscopic tool with the potential to simultaneously achieve a broad spectral coverage and ultrahigh spectral resolution with rapid data acquisition. However, the need for two independently stabilized ultrafast lasers significantly hampers the potential application of DCS. We demonstrate mode-resolved DCS in the THz region based on a free-running single-cavity dual-comb fiber laser with the adaptive sampling method. While the use of a free-running single-cavity dual-comb fiber laser eliminates the need for two mode-locked lasers and their frequency control, the adaptive sampling method strongly prevents the degradation of spectroscopic performance caused by the residual timing jitter in the free-running dual-comb laser. Doppler-limit-approaching absorption features with linewidths down to 25 MHz are investigated for low-pressure acetonitrile/air mixed gas by comb-mode-resolved THz spectroscopy. The successful demonstration clearly indicates its great potential for the realization of low-complexity, Doppler-limited THz spectroscopy instrumentation.
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    Jie Chen, Kazuki Nitta, Xin Zhao, Takahiko Mizuno, Takeo Minamikawa, Francis Hindle, Zheng Zheng, Takeshi Yasui. Adaptive-sampling near-Doppler-limited terahertz dual-comb spectroscopy with a free-running single-cavity fiber laser[J]. Advanced Photonics, 2020, 2(3): 036004
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    Category: Research Articles
    Received: Jan. 6, 2020
    Accepted: Apr. 23, 2020
    Posted: Apr. 23, 2020
    Published Online: May. 29, 2020
    The Author Email: Zheng Zheng (zhengzheng@buaa.edu.cn), Yasui Takeshi (yasui.takeshi@tokushima-u.ac.jp)