Laser interference source device for multi-channel pseudo-random code modulation

Through the laser interference source device with multi-channel pseudo-random code modulation, multi-mode optical interference simulation of single-photon detection system in complex scenarios is realized, solving the multi-beam, multi-coding, and multi-directional interference problems that traditional lidar systems cannot effectively simulate, and verifying the anti-interference performance of unmanned vehicles.

CN120385990APending Publication Date: 2025-07-29NO 27 RES INST CHINA ELECTRONICS TECH GRP +1
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Patent Information

Application Number
CN202510549700.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-04-28
Publication Date
2025-07-29

AI Technical Summary

Technical Problem

The existing lidar system cannot effectively simulate multi-beam, multi-coding, and multi-directional interference scenarios in complex scenarios, resulting in incomplete verification and evaluation of the anti-interference effect of single-photon detection systems.

Method used

The laser interference source device that adopts multi-channel pseudo-random code modulation includes a pseudo-random code modulator, an external modulation laser group, an optical fiber beam splitter group, an optical fiber beam collector and a two-dimensional galvanomic mirror. Through pseudo-random code pulse modulation, light interference pulses of different code signals are generated, and beam deflection and positioning are realized in different directions. Multi-channel fiber beam splitters are used to realize the simultaneous emission of multi-channel beams.

Benefits of technology

The multi-mode optical interference simulation of single-photon detection system in complex scenarios is realized, and its anti-interference performance in large-scale applications of unmanned vehicles is verified. It has the function of simultaneous transmission of multiple optical interference signals, which solves the practical application problem that traditional interference sources cannot be simulated.

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Abstract

The invention discloses a multi-channel pseudo-random code modulation laser interference source device. The device comprises a pseudo-random code modulator, an external modulation laser group, an optical fiber beam splitter group, an optical fiber buncher and a two-dimensional galvanometer which are arranged in sequence, according to the invention, laser modulation is carried out through the pseudo-random code pulse modulator, pseudo-random pulse codes are generated, and optical interference pulses with different coded signals are generated; two-dimensional galvanometer light beam deflection control is adopted, and control over laser interference signals in different directions can be achieved; a multi-path 1 * 2 optical fiber beam splitter and a multi-path 1 * 8 optical fiber beam splitter are adopted, beam splitting of coding signals of the same type is achieved, and the function of transmitting multi-channel interference light beams at the same time is established. According to the invention, emission of light interference signals of different codes is realized, a function of simulating laser radar light signals of unmanned vehicles produced by different manufacturers is realized, a function of simultaneously emitting multiple paths of light interference signals is realized, and a problem of simulating complex light interference environment signals in practical application of the unmanned vehicles is solved.
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