Fine-filter method for Raman lidar based on wavelength division multiplexing and fiber Bragg grating

Wang Jun; Zheng Jiao; Lu Hong; Yan Qing; Wang Li; Liu Jingjing; Hua Dengxin

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Fine-filter method for Raman lidar based on wavelength division multiplexing and fiber Bragg grating

机译：基于波分复用和光纤布拉格光栅的拉曼利达的细过滤方法

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Atmospheric temperature is one of the important parameters for the description of the atmospheric state. Most of the detection approaches to atmospheric temperature monitoring are based on rotational Raman scattering for better understanding atmospheric dynamics, thermodynamics, atmospheric transmission, and radiation. In this paper, we present a fine-filter method based on wavelength division multiplexing, incorporating a fiber Bragg grating in the visible spectrum for the rotational Raman scattering spectrum. To achieve high-precision remote sensing, the strong background noise is filtered out by using the secondary cascaded light paths. Detection intensity and the signal-to-noise ratio are improved by increasing the utilization rate of return signal form atmosphere. Passive temperature compensation is employed to reduce the temperature sensitivity of fiber Bragg grating. In addition, the proposed method provides a feasible solution for the filter system with the merits of miniaturization, high anti-interference, and high stability in the space-based platform. (C) 2017 Optical Society of America.

机译：大气温度是大气状态描述的重要参数之一。大多数检测方法到大气温度监测基于旋转拉曼散射，以便更好地理解大气动力学，热力学，大气传输和辐射。在本文中，我们介绍了一种基于波分复用的细过滤方法，包括用于旋转拉曼散射光谱的可见光谱中的光纤布拉格光栅。为实现高精度遥感，通过使用辅助级联光路滤出强大的背景噪声。通过增加返回信号形成气氛的利用率来提高检测强度和信噪比。采用无源温度补偿以降低光纤布拉格光栅的温度敏感性。此外，该方法还为过滤系统提供了一种可行的解决方案，其具有小型化，高抗干扰和基于空间平台的高稳定性的优点。（c）2017年美国光学学会。

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《Applied optics》 |2017年第31期|共6页
作者
Wang Jun; Zheng Jiao; Lu Hong; Yan Qing; Wang Li; Liu Jingjing; Hua Dengxin;
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Xian Univ Technol Sch Mech &

Precis Instrument Engn Xian 710048 Shaanxi Peoples R China;

Xian Univ Technol Sch Mech &

Precis Instrument Engn Xian 710048 Shaanxi Peoples R China;

Xian Univ Technol Sch Mech &

Precis Instrument Engn Xian 710048 Shaanxi Peoples R China;

Xian Univ Technol Sch Mech &

Precis Instrument Engn Xian 710048 Shaanxi Peoples R China;

Xian Univ Technol Sch Mech &

Precis Instrument Engn Xian 710048 Shaanxi Peoples R China;

Xian Univ Technol Sch Mech &

Precis Instrument Engn Xian 710048 Shaanxi Peoples R China;

Xian Univ Technol Sch Mech &

Precis Instrument Engn Xian 710048 Shaanxi Peoples R China;

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Fine-filter method for Raman lidar based on wavelength division multiplexing and fiber Bragg grating

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