Overview of the Chinese lidar satellite development

Zhang, Xinwei; Dai, Jun; He, Tao; Zhao, Chenguang; Huang, Jin; Li, Xu; Guo-qin, Huang; Cao, Haiyi; Lv, Yueguang; Su, Jianzhong; Gong, Wei; Yang, Jian; Bao, Weimin; Chen, Weibiao; Shi, Zelin; Fei, Jindong; Han, Shensheng; Jin, Weiqi

doi:10.1117/12.2296275

Cited by 3 publications

(2 citation statements)

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“…A high-repetition rate single-longitudinal-mode laser with a narrow pulse width and a high pulse energy is promising for applications in the fields of fast ignition lasing radiation [1], space debris detection [2], LIDAR Thomson scattering diagnosis [3], etc. Stimulated Brillouin scattering (SBS) is a simple and efficient pulse compression technology [4][5][6][7] that can compress long nanosecond pulses with a high energy to sub-nanosecond pulses.…”

Section: Introductionmentioning

confidence: 99%

Output characteristics of high-power stimulated Brillouin scattering pulse compression enhanced by thermal effects based on HT270

Wang

Cha

Kong

et al. 2022

High Pow Laser Sci Eng

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Thermal effects are typically considered as obstacles to high-repetition rate stimulated Brillouin scattering (SBS) pulse compression. In this paper, a novel method is proposed for improving the SBS output characteristics by exploiting thermal effects on the liquid medium. Using HT270, the SBS output parameters with the medium purification and rotating off-centered lens methods are studied at different repetition rates. The results indicate that these two methods can alleviate thermal effects and improve the energy efficiency, but the rotating method reduces the energy stability because of the aggravated optical breakdown at the kilohertz-level repetition rate. For a 35-mJ pump energy, the energy efficiency at 2 kHz without the rotating method is 30% higher than that at 100 Hz and 70% higher than that at 500 Hz. The enhancement of the SBS output characteristics by thermal effects is demonstrated theoretically and experimentally, and 2-kHz high-power SBS pulse compression is achieved with HT270.

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Section: Introductionmentioning

confidence: 99%

Output characteristics of high-power stimulated Brillouin scattering pulse compression enhanced by thermal effects based on HT270

Wang

Cha

Kong

et al. 2022

High Pow Laser Sci Eng

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“…With the development of remote sensing technology, spaceborne LiDAR has becoming one of the fastest and most accurate remote sensing methods for obtaining surface elevation information (Winker et al, 2003;Zhang et al, 2017). The optical path difference generated by the laser pulse passing through the atmosphere is one of the error sources that cannot be ignored in LiDAR ranging (Schutz et al, 2002;Tang et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

An Improved Temperature Spatial Interpolation Method for Spaceborne Lidar Atmospheric Correction

Zhou

Pan

et al. 2021

ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci.

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Abstract. As one of the most important meteorological elements, temperature is an indispensable meteorological parameter for the atmospheric correction of spaceborne LiDAR ranging. Given a limited number of surface meteorological observation stations, the temperature values for all region of LiDAR observation need to be interpolated using appropriate spatial interpolation methods. In this paper, based on the monthly surface observation values in individual years (1981–2010) of Sichuan province observation stations, we firstly analyze the effects of three common interpolation methods, including inverse distance weighting (IDW), ordinary kriging (OK) and gradient plus inverse distance squared (GIDS). To solve the problem of low interpolation accuracy in severely undulating terrain area, an improved gradient distance inverse square method based on the adiabatic lapse rate (GIDS-ALR) is proposed. The experimental results show that the GIDS-ALR has an obvious improvement in the effect of severely undulating terrain, where the absolute error has been improved by more than 43% in average. Additionally, the temperature-interpolated MAE is reduced by more than 30%. The effectiveness and applicability of the proposed method is verified in this paper.

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Experimental optimization of compact double-cell stimulated Brillouin scattering pulse compressor

Wang

Shan²,

Wang³

2023

Front. Phys.

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To optimize the output of SBS sub-nanosecond pulse compression, two kinds of compact double-cell structures are carried out and compared experimentally. The beam parameters of the compact double-cell structure are calculated theoretically, which provides the selection guidance of structural parameters such as lens focal length and SBS cell size. The dependence of lens parameters and medium parameters on SBS output parameters are experimentally studied. Results show that SBS pulse compression enters the saturation region at a low injection energy with a long focal length lens or a large gain coefficient medium. For compact double-cell setup with one lens, it is easy to obtain narrow pulses for the medium FC40 with a short phonon lifetime. While in setup with two lenses, it is easy to obtain SBS output with a high energy efficiency and narrow pulse width for HT110 medium with a large gain coefficient. The pulse width compression ratio is up to 16 times after optimization. These experimental results can provide references for the experimental design of SBS pulse compression.

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Overview of the Chinese lidar satellite development

Cited by 3 publications

References 0 publications

Output characteristics of high-power stimulated Brillouin scattering pulse compression enhanced by thermal effects based on HT270

Output characteristics of high-power stimulated Brillouin scattering pulse compression enhanced by thermal effects based on HT270

An Improved Temperature Spatial Interpolation Method for Spaceborne Lidar Atmospheric Correction

Experimental optimization of compact double-cell stimulated Brillouin scattering pulse compressor

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