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Frequency modulation continuous wave laser radar

A frequency-modulated continuous wave and lidar technology, which is used in the re-radiation of electromagnetic waves, radio wave measurement systems, instruments, etc. The effect of improving system integration and reliability

Pending Publication Date: 2022-07-22
SUTENG INNOVATION TECH CO LTD
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Problems solved by technology

[0004] The purpose of the present invention is to provide a frequency modulation continuous wave laser radar, which aims to solve the technical problems of large volume and low integration of frequency modulation continuous wave laser radar in the prior art

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Embodiment Construction

[0040] The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.

[0041] In the description of the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientations or positional relationships indicated by "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather...

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Abstract

The invention is suitable for the technical field of laser radars, and provides a frequency-modulated continuous wave laser radar, which comprises a frequency-modulated light source, a transceiver module and a silicon optical chip, the silicon optical chip is connected between the frequency modulation light source and the transceiver module, and the silicon optical chip comprises a first waveguide layer and a second waveguide layer which are arranged in sequence; wherein the optical power capable of being accommodated by the first waveguide layer is greater than the optical power capable of being accommodated by the second waveguide layer, and two interlayer mode converters are formed between the first waveguide layer and the second waveguide layer; a first light splitting unit is integrated on the first waveguide layer, the first light splitting unit is used for splitting a received laser beam into at least one beam of detection light and at least one beam of local oscillation light, and the optical power of each beam of local oscillation light is smaller than or equal to 50 mW; and a coherent receiving module is integrated on the second waveguide layer. The frequency-modulated continuous wave laser radar provided by the invention is small in size and high in integration level.

Description

technical field [0001] The invention belongs to the technical field of laser radar, and in particular relates to a frequency-modulated continuous wave laser radar. Background technique [0002] Lidar is one of the core sensors widely used in autonomous driving scenarios, which can be used to collect three-dimensional information of the external environment. According to the detection mechanism, lidar can be mainly divided into two types: Time of Flight (ToF) and Frequency Modulated Continuous Wave (FMCW). The FMCW lidar adopts the coherent reception method, and the balanced detection method is performed by the signal light and the local oscillator light at the receiving end, which can effectively reduce the interference of the external ambient light on the performance of the lidar and improve the performance of the lidar ranging. At the same time, FMCW lidar can provide additional speed measurement information in addition to spatial coordinate information, so it is consider...

Claims

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Application Information

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IPC IPC(8): G01S17/931G01S7/48G05B19/05
CPCG01S17/931G01S7/4802G05B19/054
Inventor 汪敬朱琳邱纯鑫刘乐天
Owner SUTENG INNOVATION TECH CO LTD
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