Researching | Isotope ratio measurement of Rb using wavelength modulation-direct absorption spectroscopy

Optics and Precision Engineering, Volume. 33, Issue 7, 1031(2025)

Isotope ratio measurement of Rb using wavelength modulation-direct absorption spectroscopy

Jizheng XU^1,2, Yuan MENG^1,2, Xingji LU¹, Jun HUANG¹, Tao YANG^1,2, Qiang ZHAO^1,2, Huanhuan SHOU^1,2, Yinbo HUANG^1,3, and Zhensong CAO^1、*

Author Affiliations

¹State Key Laboratory of Laser Interaction with Matter， Hefei Institutes of Physical Science， Chinese Academy of Sciences， Hefei23003， China

²University of Science and Technology of China， Hefei3006， China

³Nanhu Laser Laboratory， National University and Defense Technology， Changsha41007， China

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Figures&Tables (8)

References (31)

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Figures & Tables(8)

Fig. 1. Schematic diagram of Rb isotopic energy levels

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Fig. 2. Experimental setup for Rb isotope ratio measurement

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Fig. 3. Transmitted intensity and frequency calibration of WM-DAS

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Fig. 4. FFT coefficient of WM-DAS method

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Fig. 5. Measurement results of Rb atomic absorption rate， Gaussian fitting and standard residuals by different methods

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Fig. 6. Hyperfine structure fitting

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Fig. 7. Measurement stability of ⁸⁵Rb∶⁸⁷Rb

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Table 1. Gaussian fitting parameters

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Table 1. Gaussian fitting parameters

Peak	v₀	γ_D	A_s
ν₁	-3.379 7^b	0.708 3^c	0.133 0^b
ν₂	-2.180 9^a	0.641 0^b	0.321 7^a
ν₃	0.871 5^b	0.632 5^b	0.221 1^a
ν₄	3.447 3^c	0.649 5^c	0.075 0^a
ν₁₁	-3.726 0^b	0.617 8^a	0.006 6^a
ν₁₂	-3.569 1^b		0.033 0^a
ν₁₃	-3.302 5^b		0.092 4^a
ν₂₁	-2.319 9^a	0.625 0^b	0.025 6^a
ν₂₂	-2.256 5^a		0.089 8^a
ν₂₃	-2.133 9^a		0.207 7^a
ν₃₁	0.831 3^a	0.625 0^b	0.066 3^a
ν₃₂	0.860 7^a		0.085 9^a
ν₃₃	0.924 1^a		0.068 7^a
ν₄₁	3.322 0^b	0.617 8^a	0.012 6^a
ν₄₂	3.394 2^b		0.031 4^a
ν₄₃	3.551 2^b		0.031 4^a

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Jizheng XU, Yuan MENG, Xingji LU, Jun HUANG, Tao YANG, Qiang ZHAO, Huanhuan SHOU, Yinbo HUANG, Zhensong CAO. Isotope ratio measurement of Rb using wavelength modulation-direct absorption spectroscopy[J]. Optics and Precision Engineering, 2025, 33(7): 1031

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Paper Information

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Received: Dec. 11, 2024

Accepted: --

Published Online: Jun. 23, 2025

The Author Email:

DOI:10.37188/OPE.20253307.1031

Topics

laser devices and laser physics

Lasers and Laser Optics

laser manufacturing

Instrumentation, Measurement and Metrology