Traceable Measurement of Optical Path Length of Gas Cell Based on Tunable Diode Laser Absorption Spectroscopy

Jiang-xiong LONG; Yu-jun ZHANG; Li SHAO; Qing YE; Ying HE; Kun YOU; Xiao-quan SUN

doi:10.3964/j.issn.1000-0593(2022)11-3461-06

Spectroscopy and Spectral Analysis, Volume. 42, Issue 11, 3461(2022)

Traceable Measurement of Optical Path Length of Gas Cell Based on Tunable Diode Laser Absorption Spectroscopy

Jiang-xiong LONG^1、*, Yu-jun ZHANG^{1、1; *;}, Li SHAO^{1、1; *;}, Qing YE^{1、1; 2;}, Ying HE^3、3;, Kun YOU^3、3;, and Xiao-quan SUN^{1、1; 2;}

Author Affiliations

¹1. State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology, Hefei 230037, China

³3. Hefei Institutes of Physics Science, Chinese Academy of Sciences, Hefei 230031, China

show less

Abstract Get PDF(in Chinese)

Figures & Tables(7)

Fig. 1. Schematic diagram of setup for optical path measurement of gas cell
DFB: distributed feedback; D: detector (InGaAs); VG: Vacuum gauge; BV: Ball valve; NV: Needle valve; GC: Gas cylinder

Download full size

View in Article

Fig. 2. Output wavenumber of DFB as a function of temperature and current

Download full size

View in Article

Fig. 3. Detector signal and its baseline fitting at 74.2 torr and wavenumber corresponding to the sample point

Download full size

View in Article

Fig. 4. (a) Spectral absorbance and qSDVP fitting, (b) VP fitting residual, (c) qSDVP fitting residual at 74.2 Torr

Download full size

View in Article

Fig. 5. Integral absorbance A as a function of Γ and its general linear regression

Download full size

View in Article

Table 1. Integral absorbance and corresponding RSU at various pressure
View table
View in Article
Table 1. Integral absorbance and corresponding RSU at various pressure
p/Torr A_fit/cm^-1 RSU_fit/% RSU_A/%
36.0 (6.527 8±0.023 1)×10^-4 0.35 0.49
48.7 (8.835 7±0.028 8)×10^-4 0.33 0.48
59.4 (1.076 4±0.003 4)×10^-3 0.32 0.47
74.2 (1.343 6±0.003 7)×10^-3 0.28 0.44

Table 2. Uncertainty budgets for optical path length L

View table

View in Article

Table 2. Uncertainty budgets for optical path length L

Varible (Unit)	Value	RSU/%	Contribution to the uncertainty of L/%
A_fit/cm^-1	1.343 6×10^-3	0.28	29.10
K_n	1	0.34	43.98
$S_{1, T_{0}}$ /(cm·molecule^-1)	6.647×10^-24	0.15	8.38
K_1,_T	1.014 6	0.05	1.05
$S_{2, T_{0}}$ /(cm·molecule^-1)	9.768×10^-27	2	0.00
K_2,_T	0.973 6	0.05	0.00
p/Pa	9.892 5×10³	0.2	14.84
r_iso	1.000	0.05	0.92
$χ_{C O_{2}}$ /(mol·mol^-1)	1	0.001	0.00
T/K	294.2	0.07	1.72
k_B/(J·K^-1)	1.380 648 53×10^-23	0	0
L/cm	81.61±0.42	0.51

Tools

Get Citation

Copy Citation Text

Jiang-xiong LONG, Yu-jun ZHANG, Li SHAO, Qing YE, Ying HE, Kun YOU, Xiao-quan SUN. Traceable Measurement of Optical Path Length of Gas Cell Based on Tunable Diode Laser Absorption Spectroscopy[J]. Spectroscopy and Spectral Analysis, 2022, 42(11): 3461

Download Citation

EndNote(RIS)BibTex Plain Text

Set citation alerts for article

Save article for my favorites