On-chip integrated chaotic radar chip and preparation method thereof

A chip and chaotic technology, applied in the field of lasers, can solve problems such as large size and complex structure, and achieve the effect of comprehensive functions, small volume, and complex structure

Pending Publication Date: 2021-02-05
CHINA SCI PHOTON CHIP HAINING TECH CO LTD
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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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  • On-chip integrated chaotic radar chip and preparation method thereof
  • On-chip integrated chaotic radar chip and preparation method thereof
  • On-chip integrated chaotic radar chip and preparation method thereof

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Embodiment Construction

[0060] Conventional chaotic lidar systems usually include chaotic lasers, beam splitters, beam expanders, converging optical lenses, photodetectors, scanning mirrors, scanning platforms, receivers, digital correlators, signal processors, audible and visual alarms, and displays , the chaotic laser can be composed of a laser II connected in sequence by an optical fiber, a fiber coupler, a fiber variable mirror, and an aspheric lens optically connected to the other output end of the fiber coupler. The chaotic laser generated by the chaotic laser is injected into the beam splitter. The beam splitter divides the chaotic laser into transmitted light and reflected light. The reflected light is input to the converging optical lens and photodetector in turn as reference light. The photodetector converts the reference light into The electrical signal is then input to the digital correlator; the transmitted light is sequentially input to the beam expander and the scanning mirror fixed on ...

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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...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/481
CPCG01S7/481
Inventor 刘敬伟徐浩李文玲田成才
Owner CHINA SCI PHOTON CHIP HAINING TECH CO LTD
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