Silicon optical chip and laser radar system

A silicon optical chip and light splitting technology, applied in the field of radar, can solve the problems of low laser transmission efficiency and achieve the effect of improving laser utilization, effectiveness and transmission efficiency

Pending Publication Date: 2020-12-25
UNITED MICROELECTRONICS CENT CO LTD
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Problems solved by technology

[0005] However, in existing silicon photonic chips, the transmission efficiency of laser light is low, and there is an urgent need for a silicon photonic chip that can improve the efficiency of laser transmission

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  • Silicon optical chip and laser radar system
  • Silicon optical chip and laser radar system

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Embodiment Construction

[0030] As mentioned above, FMCW lidar needs to divide the light into reference light, measure local oscillator light, and echo signal light to be coupled into the optical fiber, and the distance and speed information can be obtained by interference and detection through optical fiber transmission. Due to the minimum bending radius of optical fibers and the large size of various optical fiber devices, FMCW lidar requires more optical fiber devices. As a result, the existing FMCW lidar has low integration and uncompact structure. In existing silicon photonic chips, the transmission efficiency of laser light is low, and a silicon photonic chip is urgently needed to improve the efficiency of laser transmission.

[0031] The inventors of the present invention have found through research that in the prior art, multiple separate devices are directly integrated into the silicon photonics chip, especially when the incident light is multi-path lasers, the multi-path lasers are directly ...

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Abstract

The invention provides a silicon optical chip and a laser radar system. The silicon optical chip comprises a first coupler and a second coupler, wherein the first coupler is used for receiving multiple paths of incident light from an external light source and coupling the multiple paths of incident light into first single-path transmission light; and the second coupler is used for receiving one part of the first single-path transmission light, splitting one part of the first single-path transmission light into multiple paths of emergent light and transmitting the emergent light to an externaldetection device. According to the silicon optical chip and the laser radar system, the laser transmission efficiency can be improved.

Description

technical field [0001] The invention relates to the field of radar technology, in particular to a silicon photonic chip and a laser radar system. Background technique [0002] The two-dimensional frequency modulated continuous wave radar (Frequency Modulated Continuous Wave, FMCW) lidar system can perform two-dimensional plane scanning measurement and the ranging information of the lidar itself, so as to realize the three-dimensional information collection of surrounding targets. The existing two-dimensional FMCW lidar mainly uses linear array FMCW lidar for 360-degree mechanical scanning or multi-dimensional mechanical scanning of single-point FMCW lidar to realize two-dimensional scanning FMCW lidar. [0003] FMCW lidar needs to divide the light into reference light, measure the local oscillator light, and couple the echo signal light into the optical fiber, and perform interference and detection through optical fiber transmission to obtain distance and speed information. ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/481G01S7/497G01S17/88
CPCG01S7/481G01S7/497G01S17/88
Inventor 杨米杰金里曹睿冯俊波蒋平郭进
Owner UNITED MICROELECTRONICS CENT CO LTD
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