Receiving and transmitting co-located polarization laser radar system based on optical rotator

Abstract

The invention provides a polarization laser radar system with transmitting and receiving functions based on an optical rotator, and in the polarization laser radar system with transmitting and receiving functions, echo signal light obtained based on emergent signal light generated by a pulse laser comprises signal light in a parallel polarization state and signal light in a vertical polarization state. As the polarization beam splitter cannot reflect the signal light in the parallel polarization state, the polarization state of the echo signal light is adjusted by rotating the polarization plane of the echo signal light through the optical rotator, so that the optical rotator is in a working state and a non-working state respectively; all polarization states in echo signal light can be reflected to a signal detection and data processing system by the polarization beam splitter, so that the defect that the polarization beam splitter can only reflect signal light in one polarization direction is overcome; therefore, all polarization information of the polarized light in different directions in the echo signal light can be analyzed by the transmitting-receiving co-positioned polarized laser radar system, and the detection performance and the application range of the polarized laser radar are greatly expanded.

Description

technical field [0001] The present invention relates to the field of optoelectronic technology, and more particularly, to an optical rotator-based transceiver co-located polarization laser radar system. Background technique [0002] Since the development of polarized lidar, it has shown excellent performance in atmospheric detection, etc. Polarized lidar can effectively observe the spatiotemporal distribution and optical properties of non-spherical particles in the atmosphere, and deduce the atmospheric environment such as wind field, sand and dust. [0003] Due to the powerful detection performance of polarization lidar, its development is rapid and fruitful. For example, the dual-wavelength three-channel lidar deployed by the Meridian Project in my country can obtain atmospheric backscattered echo signals from near the ground to 110 km, and then invert parameters such as density, temperature, and sodium layer density in the middle and upper atmosphere. The lidar network b...

AI Technical Summary

Problems solved by technology

When receiving the signal beam, since the polarization beam splitter only allows reflection and transmission of light in a specific polarization direction, two detectors are required to detect the signals of the two polarization states in the receiving signal beam, which makes the cost and stability of the polarization lidar limited. extremely restrictive

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