On-chip integrated chaotic radar chip and preparation method thereof

Abstract

The invention provides an on-chip integrated chaotic radar chip and a preparation method thereof, the output end of a semiconductor laser chip outputs a laser signal to the input end of a coupling waveguide, an initial chaotic signal is generated in the coupling waveguide, and part of the initial chaotic signal enters a detection optical waveguide and outputs a first chaotic signal; a detection light diffraction structure receives the first chaotic signal and transmits a detection signal to a target object; reference optical waveguide receives a part of the initial chaotic signal and outputs areference optical signal, and a first photoelectric detector chip receives the reference optical signal and converts the reference optical signal into a reference signal; namely, a semiconductor laser chip, a waveguide structure, the first photoelectric detector chip and the detection light diffraction structure are arranged on the surface of the substrate, the basic functions of the chaotic laser radar system are achieved, meanwhile, the problems that the chaotic laser radar system is complex in structure and large in size are solved, and the chaotic laser radar system is small in size and high in integration degree. Large-scale integration is easy to realize.

Description

technical field [0001] The invention relates to the technical field of lasers, in particular to an on-chip chaotic radar chip and a preparation method thereof. Background technique [0002] With the rapid development of public transportation systems, unmanned vehicles are developing rapidly, and in the field of unmanned vehicles, lidar is undoubtedly one of the most important devices. What follows is a higher demand for performance such as lidar anti-interference and ranging accuracy. [0003] With the increasing radar technology and its spectrum requirements, radar signals co-existing in the same bandwidth face a serious threat of mutual interference (Jian Dai, et al., IEEE Access, 2020). Taking the radar with pulsed laser as the signal source as an example, the time-of-flight of each pulse reflected from the target is measured by transmitting repeated frequency pulses, and then the distance information of the detected target is obtained. Pulse lidar has the advantages of...

AI Technical Summary

Problems solved by technology

[0007] Therefore, the technical problem to be solved by the present invention is to overcome the defects of complex structure and large size of the existing chaotic lidar system, thereby providing an on-chip integrated chaotic radar chip and its preparation method

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