<trans-title xml:lang="en">High precision calibration of spectral parameters of CO at 1567 nm based on wavelength modulation-direct absorption spectroscopy</trans-title>

Fig. 1. System schematic diagram of WM-DAS and CW-CRDS. LC, laser current and temperature controller; FI, fiber isolator; AOM, acousto-optic modulator; APD, avalanche photodiode; PD, photodiode; DDG, digital delay generator; PZT, piezoelectric transducer; WM, wavelength meter.

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Fig. 2. Measured transmitted intensities of 100 periods of sinusoidal waves and fitted frequency (FSR, free spectral range), and fast Fourier transform (FFT) coefficients A_k and B_k of transmitted light intensity.

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Fig. 3. Measured absorption function of CO and the best fits of Voigt and Rautian profile (X_CO, c, τ, and σ_SD represent the CO concentration, light velocity, ring down time and standard deviation of the residual, respectively): (a) WM-DAS; (b) CW-CRDS.

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Fig. 4. Measured spectral parameters for various pressures (WM-DAS (red), CW-CRDS (black)): (a) γ_c (dot); (b) β (square), γ₂ (triangle).

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Fig. 5. Allan variance measured by the two methods.

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Table 1. Measured spectroscopic parameters and uncertainties.

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Table 1. Measured spectroscopic parameters and uncertainties.

v₀/cm^–1	Transition	E′′/cm^–1	ϕ	γ₀(T₀)/10^–2 cm^–1·atm^–1			β₀(T₀)/10^–2 cm^–1·atm^–1		γ₂(T₀)/10^–2 cm^–1·atm^–1
v₀/cm^–1	Transition	E′′/cm^–1	ϕ	CRDS	WM	HT	CRDS	WM	CRDS	WM
注: WM代表WM-DAS, HT表示HITRAN^[36];^a表示相同温度(T₀ = 288 K)下HITRAN的数据, 空气为背景气;^b不确定度 0—1%;^c不确定度 5%—15%;^d不确定度 10%—20%.
6371.299	R5	57.670	VP	6.26^b	6.23^b	6.29^a	—	—	—	—
			GP	6.43^b	6.48^b		2.84^c	2.90^d	—	—
			RP	6.47^b	6.50^b		2.57^c	2.67^d	—	—
			SDVP	6.50^b	6.55^b		—	—	0.87^c	0.77^d
6374.406	R6	80.735	VP	6.10^b	6.08^b	6.12^a	—	—	—	—
			GP	6.20^b	6.30^b		2.65^c	2.71^d	—	—
			RP	6.25^b	6.30^b		2.38^c	2.46^d	—	—
			SDVP	6.26^b	6.36^b		—	—	0.69^c	0.73^d
6377.407	R7	107.642	VP	5.97^b	5.94^b	5.99^a	—	—	—	—
			GP	6.07^b	6.12^b		2.22^c	2.48^d	—	—
			RP	6.10^b	6.17^b		2.06^c	2.36^d	—	—
			SDVP	6.25^b	6.24^b		—	—	0.71^c	0.71^d
6380.301	R8	138.390	VP	5.89^b	5.88^b	5.89^a	—	—	—	—
			GP	6.04^b	6.02^b		2.20^c	2.27^d	—	—
			RP	6.06^b	6.09^b		2.14^c	2.14^d	—	—
			SDVP	6.11^b	6.15^b		—	—	0.70^c	0.64^d
6383.090	R9	172.978	VP	5.80^b	5.78^b	5.80^a	—	—	—	—
			GP	5.91^b	6.03^b		2.08^c	2.11^d	—	—
			RP	5.94^b	6.03^b		1.89^c	1.85^d	—	—
			SDVP	5.97^b	6.09^b		—	—	0.61^c	0.63^d
6385.771	R10	211.404	VP	5.72^b	5.68^b	5.73^a	—	—	—	—
			GP	5.91^b	5.89^b		2.27^c	2.29^d	—	—
			RP	5.92^b	5.91^b		1.98^c	1.86^d	—	—
			SDVP	5.98^b	5.96^b		—	—	0.62^c	0.65^d
6388.347	R11	253.667	VP	5.62^b	5.58^b	5.67^a	—	—	—	—
			GP	5.91^b	5.80^b		2.62^c	2.21^d	—	—
			RP	5.93^b	5.82^b		2.15^c	2.00^d	—	—
			SDVP	5.95^b	5.89^b		—	—	0.77^c	0.67^d

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Zhen Wang, Yan-Jun Du, Yan-Jun Ding, Zhi-Min Peng. High precision calibration of spectral parameters of CO at 1567 nm based on wavelength modulation-direct absorption spectroscopy[J]. Acta Physica Sinica, 2020, 69(6): 064204-1

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Paper Information

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Received: Dec. 9, 2019

Accepted: --

Published Online: Nov. 19, 2020

The Author Email:

DOI:10.7498/aps.69.20191865

Topics

Nuclear physics

Particles and fields

Particle and nuclear astrophysics and cosmology