Measurement of Air Refractive Index Method by Combining Laser Single-Frequency Interferometry with PTF Sensing

Liping Yan; Jianbo Jiang; Yingtian Lou; Benyong Chen; Jiandong Xie

doi:10.3788/LOP220579

Laser & Optoelectronics Progress, Volume. 60, Issue 5, 0512001(2023)

Measurement of Air Refractive Index Method by Combining Laser Single-Frequency Interferometry with PTF Sensing

Liping Yan, Jianbo Jiang, Yingtian Lou, Benyong Chen^*, and Jiandong Xie

Author Affiliations

Laboratory of Nanometer Measurement Technology, Zhejiang Sci-Tech University, Hangzhou 310018, Zhejiang , China

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$Schematic of air refractive index measurement with phase modulated laser single-frequency interferometer$

Fig. 1. Schematic of air refractive index measurement with phase modulated laser single-frequency interferometer

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Fig. 2. Experimental setup

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$Air refractive index measurement and comparison experiment in 12 min. (a) Measurement results of nairby two methods; (b) difference of nair measured by two methods; (c) fractional phase and temperature data; (d) pressure and humidity data$

Fig. 3. Air refractive index measurement and comparison experiment in 12 min. (a) Measurement results of n_airby two methods; (b) difference of n_air measured by two methods; (c) fractional phase and temperature data; (d) pressure and humidity data

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$Air refractive index measurement and comparison experiment in 1 h. (a) Measurement results of nair by two methods; (b) difference of nair measured by two methods; (c) fractional phase and temperature data; (d) pressure and humidity data$

Fig. 4. Air refractive index measurement and comparison experiment in 1 h. (a) Measurement results of n_air by two methods; (b) difference of n_air measured by two methods; (c) fractional phase and temperature data; (d) pressure and humidity data

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Table 1. Uncertainties of air refractive index $u (n_{a e})$ with different sensor accuracies

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Table 1. Uncertainties of air refractive index $u (n_{a e})$ with different sensor accuracies

No.	Uncertainties of environmental parameters			Uncertainty of $u (n_{a e})$ with Edlén equation
No.	Pressure /Pa	Temperature /℃	Relative humidity /%	Uncertainty of $u (n_{a e})$ with Edlén equation
1	5	0.01	1	2.1×10^-8
2	10	0.05	1	5.5×10^-8
3	50	0.50	5	4.8×10^-7
4	100	0.50	5	5.4×10^-7
5	200	0.50	5	7.1×10^-7
6	100	0.70	5	7.0×10^-7
7	150	0.30	5	4.9×10^-7

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Liping Yan, Jianbo Jiang, Yingtian Lou, Benyong Chen, Jiandong Xie. Measurement of Air Refractive Index Method by Combining Laser Single-Frequency Interferometry with PTF Sensing[J]. Laser & Optoelectronics Progress, 2023, 60(5): 0512001

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Paper Information

Category: Instrumentation, Measurement and Metrology

Received: Dec. 18, 2021

Accepted: Jan. 21, 2022

Published Online: Mar. 16, 2023

The Author Email: Benyong Chen (chenby@zstu.edu.cn)

DOI:10.3788/LOP220579

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Uncertainties of air refractive index u(nae) with different sensor accuracies

Table 1. Uncertainties of air refractive index u(nae) with different sensor accuracies

Table 1. Uncertainties of air refractive index $u (n_{a e})$ with different sensor accuracies

Table 1. Uncertainties of air refractive index $u (n_{a e})$ with different sensor accuracies