Research progress of ocean environmental laser remote sensing based on Brillouin scattering

Jiaqi Xu; Yuanqing Wang; Yangrui Xu; Kun Liang; Yongchao Zheng; Yun Su; Jinghao Zhang

doi:10.3788/IRLA20211036

Journals >Infrared and Laser Engineering >Volume 50 >Issue 6 >Page 20211036 > Article

Infrared and Laser Engineering
Vol. 50, Issue 6, 20211036 (2021)

Research progress of ocean environmental laser remote sensing based on Brillouin scattering

Jiaqi Xu¹, Yuanqing Wang¹, Yangrui Xu¹, Kun Liang¹..., Yongchao Zheng^2,3, Yun Su^2,3 and Jinghao Zhang^2,3|Show fewer author(s)

Author Affiliations

¹School of Electronic Information and Communications, Huazhong University of Science and Technology, Wuhan 430074, China

²Beijing Institute of Space Mechanics & Electricity, Beijing 100094, China

³Key Laboratory of Space Laser Information Sensing Technology, China Academy of Space Technology, Beijing 100094, China

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DOI: 10.3788/IRLA20211036 Cite this Article

Jiaqi Xu, Yuanqing Wang, Yangrui Xu, Kun Liang, Yongchao Zheng, Yun Su, Jinghao Zhang. Research progress of ocean environmental laser remote sensing based on Brillouin scattering[J]. Infrared and Laser Engineering, 2021, 50(6): 20211036 Copy Citation Text

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Abstract

Brillouin lidar is one of the important methods to detect ocean environmental parameters. Firstly, the basic work principle of Brillouin lidar system was introduced. Then, from the theoretical basis, three retrieval models based on the relationship between Brillouin scattering spectrum characteristics: Brillouin shift, Brillouin linewidth, and the combination of them, and ocean environmental parameters were introduced. Secondly, as the key technology of Brillouin lidar, several Brillouin spectrum measurement methods were introduced: the scanning Fabry-Pérot(F-P) interferometer, the edge detection technique, F-P etalon combined with Intensified Charge Coupled Device(ICCD), and multi edge detection technique.

Keywords

Brillouin scattering ocean environment ocean remote sensing scattering spectrum

${v_B}= - \frac{{{\omega _q}}}{{2\pi }}= \mp \frac{{2n{V_S}}}{{{\lambda _i}}}\sin \frac{\theta }{2}$

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${\varGamma _B}=\frac{{\varGamma {q^2}}}{\pi }=\frac{1}{{2\pi \rho }} \cdot \left[ {\frac{4}{3}{\eta _s}{\rm{ + }}{\eta _b} + \frac{\kappa }{{{C_V}}}\left( {\gamma - 1} \right)} \right] \cdot {\left( {\frac{{4\pi n}}{{{\lambda _i}}}\sin \frac{\theta }{2}} \right)^2}$

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${v_B} = \frac{{2n(T,S,\lambda ){V_s}(T,S,p)}}{{{\lambda _i}}}\sin \frac{\theta }{2}$

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\begin{aligned} T (S, v_{B}) = & t_{0} + t_{1} (v_{B} - 7.5) + t_{2} (v_{B} - 7.5)^{2} + t_{3} (v_{B} - 7.5)^{3} + \\ t_{4} (v_{B} - 7.5)^{6} + S [t_{5} + t_{6} (v_{B} - 7.5) + \\ t_{7} {(v_{B} - 7.5)}^{2} + t_{8} {(v_{B} - 7.5)}^{3}] \end{aligned}

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\begin{aligned} V_{S} (S, v_{B}) = & c_{0}^{^{'}} + c_{1}^{^{'}} (v_{B} - 7.5) + c_{2}^{^{'}} (v_{B} - 7.5)^{2} + c_{3}^{^{'}} (v_{B} - 7.5)^{3} + \\ c_{4}^{^{'}} (v_{B} - 7.5)^{5} + S [c_{5}^{^{'}} + c_{6}^{^{'}} {(v_{B} - 7.5)}^{2} + \\ c_{7}^{^{'}} {(v_{B} - 7.5)}^{3}] \end{aligned}

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\begin{aligned} Γ_{B} = & \frac{1}{2 π ρ (T, S)} \cdot [\frac{4}{3} η_{s} (T, S) + η_{b} (T, S) + \frac{κ}{C_{p}} (γ - 1)] \cdot \\ {(\frac{4 π n (T, S)}{λ_{i}} \sin \frac{θ}{2})}^{2} \end{aligned}

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$T(S, {\varGamma _B})=\sum\limits_{i=0}^5 {{t_i}\varGamma _B^{ - i}} + S({t_6}\varGamma _B^{ - 1} + {t_7}\varGamma _B^{ - 2} + {t_8}\varGamma _B^{ - 3})$

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