Analysis and experiment of synchronized calibration of doppler asymmetric spatial heterodyne spectroscopy (DASH)

Di Fu; Zhinan Zhang; Zhaohui Zhang; Peng Yan; Juan Li; Yafei Zhang; Yutao Feng

doi:10.1117/12.2522002

15 February 2019 Analysis and experiment of synchronized calibration of doppler asymmetric spatial heterodyne spectroscopy (DASH)

Di Fu, Zhinan Zhang, Zhaohui Zhang, Peng Yan, Juan Li, Yafei Zhang, Yutao Feng

Author Affiliations +

Proceedings Volume 11052, Third International Conference on Photonics and Optical Engineering; 1105216 (2019) https://doi.org/10.1117/12.2522002
Event: The International Conference on Photonics and Optical Engineering, 2018, Xi'an, China

Abstract

Doppler asymmetric spatial heterodyne spectroscopy (DASH) with its high stability and feasibility of synchronized calibration highly suit for the wind field observation. By applying the synchronized calibration, the thermal phase distortion of observation emission line could be corrected greatly based on the similarity of thermal effects between observation emission line and calibration line. While, the correction residual which could be called relative thermal phase distortion still influence the wind measurement precision significantly. In this manuscript, we discuss and analyze the relative phase distortion of DASH theoretically and practically based on the DASH retrieval theory and the experiment. Firstly, based on the retrieve theory of DASH, we analyze the relationship between the relative phase distortion and the precision of the wind measurement. It is found that 1.528mrad phase error equal to 1m/s wind measurement error for the DASH developed by our research group. Secondly, based on the DASH developed by our research group, laser of 632.8nm and Ne lamp are employed as input source to test relationship between relative phase distortion and internal temperature of interferometer. According to the experiment result, the relative phase distortion change weekly with the variation of temperature between 25.14°C and 25.67°C. While, the relative phase stability decrease rapidly in other else temperature range. Lastly, according to the experiment result, we analyze the major source of relative phase distortion which could make contribution to reducing the relative phase error, which could increase the wind measurement precision, in the future research.

Citation Download Citation

Di Fu, Zhinan Zhang, Zhaohui Zhang, Peng Yan, Juan Li, Yafei Zhang, and Yutao Feng "Analysis and experiment of synchronized calibration of doppler asymmetric spatial heterodyne spectroscopy (DASH)", Proc. SPIE 11052, Third International Conference on Photonics and Optical Engineering, 1105216 (15 February 2019); https://doi.org/10.1117/12.2522002

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KEYWORDS

Calibration

Wind measurement

Interferometers

Doppler effect

Thermal effects

Distortion

Heterodyning

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