Spectral distortion of dual-comb spectrometry due to repetition rate fluctuation

doi:10.1088/1674-1056/25/4/044207

中国物理B ›› 2016, Vol. 25 ›› Issue (4): 44207-044207.doi: 10.1088/1674-1056/25/4/044207

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Spectral distortion of dual-comb spectrometry due to repetition rate fluctuation

Hong-Lei Yang(杨宏雷), Hao-Yun Wei(尉昊赟), Yan Li(李岩)

State Key Laboratory of Precision Measurement Technology & Instruments, Department of Precision Instrument, Tsinghua University, Beijing 100084, China

收稿日期:2015-10-12 修回日期:2015-11-15 出版日期:2016-04-05 发布日期:2016-04-05
通讯作者: Yan Li E-mail:liyan@mail.tsinghua.edu.cn
基金资助:
Project supported by the State Key Laboratory of Precision Measurement Technology & Instruments of Tsinghua University and the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 61205147).

Spectral distortion of dual-comb spectrometry due to repetition rate fluctuation

Hong-Lei Yang(杨宏雷), Hao-Yun Wei(尉昊赟), Yan Li(李岩)

State Key Laboratory of Precision Measurement Technology & Instruments, Department of Precision Instrument, Tsinghua University, Beijing 100084, China

Received:2015-10-12 Revised:2015-11-15 Online:2016-04-05 Published:2016-04-05
Contact: Yan Li E-mail:liyan@mail.tsinghua.edu.cn
Supported by:
Project supported by the State Key Laboratory of Precision Measurement Technology & Instruments of Tsinghua University and the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 61205147).

摘要/Abstract

摘要： Dual-comb spectrometry suffers the fluctuations of parameters in combs. We demonstrate that the repetition rate is more important than any other parameter, since the fluctuation of the repetition rate leads to a change of difference in the repetition rate between both combs, consequently causing the conversion factor variation and spectral frequency misalignment. The measured frequency noise power spectral density of the repetition rate exhibits an integrated residual frequency modulation of 1.4 Hz from 1 Hz to 100 kHz in our system. This value corresponds to the absorption peak fluctuation within a root mean square value of 0.19 cm^-1 that is verified by both simulation and experimental result. Further, we can also simulate spectrum degradation as the fluctuation varies. After modifying misaligned spectra and averaging, the measured result agrees well with the simulated spectrum based on the GEISA database.

关键词: optical frequency comb, Infrared spectra, molecular spectra

Abstract: Dual-comb spectrometry suffers the fluctuations of parameters in combs. We demonstrate that the repetition rate is more important than any other parameter, since the fluctuation of the repetition rate leads to a change of difference in the repetition rate between both combs, consequently causing the conversion factor variation and spectral frequency misalignment. The measured frequency noise power spectral density of the repetition rate exhibits an integrated residual frequency modulation of 1.4 Hz from 1 Hz to 100 kHz in our system. This value corresponds to the absorption peak fluctuation within a root mean square value of 0.19 cm^-1 that is verified by both simulation and experimental result. Further, we can also simulate spectrum degradation as the fluctuation varies. After modifying misaligned spectra and averaging, the measured result agrees well with the simulated spectrum based on the GEISA database.

Key words: optical frequency comb, Infrared spectra, molecular spectra

中图分类号: (Metrological applications; optical frequency synthesizers for precision spectroscopy)

42.62.Eh

33.20.Ea (Infrared spectra) 33.20.-t (Molecular spectra)

杨宏雷, 尉昊赟, 李岩. Spectral distortion of dual-comb spectrometry due to repetition rate fluctuation[J]. 中国物理B, 2016, 25(4): 44207-044207.

Hong-Lei Yang(杨宏雷), Hao-Yun Wei(尉昊赟), Yan Li(李岩). Spectral distortion of dual-comb spectrometry due to repetition rate fluctuation[J]. Chin. Phys. B, 2016, 25(4): 44207-044207.

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Spectral distortion of dual-comb spectrometry due to repetition rate fluctuation

Spectral distortion of dual-comb spectrometry due to repetition rate fluctuation

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