Laser wind sounding radar system and method based on double-clad cascaded double-pass amplification

By using a cascaded dual-path pre-amplification and reverse-pumping structure, the efficiency and integration issues of pulse source amplifiers in medium-range coherent wind radar were solved, resulting in a high-gain, low-noise, and highly integrated lidar system.

CN122110149AActive Publication Date: 2026-05-29ZHUHAI GUANGHENG TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHUHAI GUANGHENG TECH CO LTD
Filing Date
2026-04-30
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

In existing medium-range coherent wind lidar systems, it is difficult for the amplifier of the pulsed light source to simultaneously achieve high conversion efficiency and high energy/power gain. Furthermore, existing two-way amplification techniques fail to effectively suppress the influence of continuous optical power on the signal, leading to system complexity and difficulty in integration.

Method used

A laser wind radar system based on double-clad cascaded two-way amplification is adopted. By cascading two-way preamplifier and main amplifier, combined with a single 940nm multimode pump source, the continuous light and pulsed light are cascaded two-way amplification, suppressing ASE noise. A reverse pump structure is also used to suppress nonlinear effects and simplify circuit design.

Benefits of technology

It achieves high gain (above 50dB), high signal-to-noise ratio (60dB) and high integration, while suppressing ASE self-pulse phenomenon, simplifying system structure, and improving the stability and compactness of lidar.

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Abstract

The application aims to provide a laser wind measurement radar system and method based on double-clad cascaded double-pass amplification. The system comprises a seed source, a cascaded double-pass pre-amplifier, a main amplifier, a telescope and a pump source. The cascaded double-pass pre-amplifier comprises a first double-pass amplification unit and a second double-pass amplification unit connected in sequence. An optical signal passes through the first double-pass amplification unit and the second double-pass amplification unit in sequence, and is used for two-stage double-pass amplification of an optical signal output by the seed source. The method comprises the following steps: S1, continuous light generation and beam splitting; S2, cascaded double-pass amplification; S3, pulse modulation; S4, main power amplification; S5, emission and reception; and S6, coherent detection. The application is applied to the technical field of laser radar.
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