Calibration technology for spectral range and signal-to-noise ratio of terahertz time-domain spectrometer

Shibang MA; Dong LI; Qi XIE; Hongguang LI; Deng ZHANG; Junwei CHU; Yu'nan SUN

doi:10.5768/JAO202344.0503002

Journal of Applied Optics, Volume. 44, Issue 5, 1068(2023)

Calibration technology for spectral range and signal-to-noise ratio of terahertz time-domain spectrometer

Shibang MA1,*... Dong LI2, Qi XIE1, Hongguang LI1, Deng ZHANG1, Junwei CHU1 and Yu'nan SUN1 |Show fewer author(s)

Author Affiliations

¹Xi'an Institute of Applied Optics, Xi'an 710065, China

²Military Representative Organization of the Army Aviation in Luoyang District, Luoyang 471000, China

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Figures & Tables(8)

Fig. 1. Composition block diagram of mechanical delayed time-domain spectrometer

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Fig. 2. Composition block diagram of asynchronous sampling time-domain spectrometer

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Fig. 3. Schematic diagram of spectral range for THz time-domain spectrometer

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Fig. 4. THz time-domain spectral signal

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Fig. 5. Signal-to-noise ratio curve in frequency domain

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Table 1. Calibration results of spectral range with different M values
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Table 1. Calibration results of spectral range with different M values
M值光谱范围/THz
10 0.11~2.83
20 0.09~3.23
30 0.09~3.42
40 0.08 ~3.58
50 0.08~3.63
60 0.08~3.63
70 0.08~3.64
80 0.08~3.68

Table 2. Calibration results of spectral range with different humidity
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Table 2. Calibration results of spectral range with different humidity
相对湿度/% 光谱范围/THz
5 0.08~3.68
10 0.08~3.65
15 0.08~3.62
20 0.08~3.61
25 0.08~3.57
30 0.08~3.56
35 0.08~3.54
40 0.08~3.52
45 0.08~3.50
50 0.08~3.48
60 0.08~2.61
70 0.08~1.42

Table 3. Calibration results of signal-to-noise ratio in time domain with different humidity
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Table 3. Calibration results of signal-to-noise ratio in time domain with different humidity
相对湿度/% 时域信噪比/dB
5 69.6
10 69.4
15 69.3
20 69.1
25 68.8
30 68.6
35 68.5
40 68.4
45 68.2
50 67.7
60 22.4
70 5.4

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Shibang MA, Dong LI, Qi XIE, Hongguang LI, Deng ZHANG, Junwei CHU, Yu'nan SUN. Calibration technology for spectral range and signal-to-noise ratio of terahertz time-domain spectrometer[J]. Journal of Applied Optics, 2023, 44(5): 1068

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