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Optical signal processor, radar, and optical signal processing method

A technology of optical signal and processor, applied in the field of optical signal processing, which can solve the problems of optical signal fluctuations and the detection device being unable to determine whether to receive reflected optical signals, etc.

Pending Publication Date: 2021-12-31
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, when the detection device is disturbed, the optical signal received by the detection device may fluctuate, and the detection device cannot determine whether it has received the reflected optical signal

Method used

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  • Optical signal processor, radar, and optical signal processing method
  • Optical signal processor, radar, and optical signal processing method
  • Optical signal processor, radar, and optical signal processing method

Examples

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Embodiment 1

[0098] The application scenario of the optical signal processor provided by the embodiment of the present application is firstly described as an example below.

[0099] For example, the optical signal processor of the embodiment of the present application can be applied to the technical field of laser-based radar detection.

[0100] Figure 1A It is a schematic diagram 1 of the application scenario involved in the embodiment of this application. Such as Figure 1A As shown, in the embodiment of the present application, the lidar may include a transmitting device and a receiving device.

[0101] For example, the emitting device may be used to emit a probe light signal. Wherein, the detection light signal can be used to detect whether there is an object in the target area and to obtain information of the detected object. In an example, the transmitting device may be a laser, and the laser transmits the detection light signal to the target area through the transmission window, ...

Embodiment 2

[0152] The composition and structure of the optical signal processor provided in the embodiment of the present application will be exemplarily described below.

[0153] Figure 4 Schematic diagram 1 of the structure of the optical signal processor provided by the embodiment of the present application.

[0154] Such as Figure 4 shown in figure 2 On the basis of the optical signal processor shown, the signal beam splitting component 100 in the optical signal processor 1000 of the embodiment of the present application may include a dichroic prism 111 and a reflective prism 112, a first filter 121, a notch 122, a second Two filters 131.

[0155] Wherein, the dichroic prism 111 is used to receive the echo light signal, and output the echo light signal to the reflective prism and the second filter respectively; the reflective prism 112 is used to reflect the received echo light signal to the first filter.

[0156] The first optical filter 121 is used to filter the received ec...

Embodiment 3

[0182] The embodiment of the present application also provides an optical signal processor.

[0183] Figure 7 Schematic diagram of the structure of the optical signal processor provided for the embodiment of this application Figure II . Such as Figure 7 shown in figure 2 On the basis of the optical signal processor shown, the signal beam splitting component 100 in the optical signal processor 1000 of the embodiment of the present application may include a fiber beam splitter 113, a first optical filter 121, a notch filter 122, a second filter Light sheet 131.

[0184] Wherein, the optical fiber beam splitter 113 is configured to receive the echo optical signal, and output the echo optical signal to the first filter 121 and the second filter 131 respectively through an optical fiber.

[0185] The first optical filter 121 is used to filter the received echo optical signal, and output the echo optical signal in the signal extraction band to the notch filter; the notch fi...

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Abstract

The embodiment of the invention provides an optical signal processor and an optical signal processing method, which can be applied to the fields of laser radar, Internet of Vehicles and the like, and the optical signal processor comprises a signal beam splitting assembly which is used for receiving an echo optical signal and respectively outputting a main optical path signal and a differential optical path signal, wherein the echo optical signal comprises a detection optical signal and a noise signal, the wave band of the main optical path signal comprises the wave band of the detection optical signal, and the wave band of the differential optical path signal is not overlapped with the wave band of the detection optical signal; and the optical signal processor also comprises a differential detector used for respectively receiving the main optical path signal and the differential optical path signal, and extracting detection information in the main optical path signal according to the main optical path signal and the differential optical path signal. According to the technical scheme provided by the invention, the problem of wrong early warning caused by noise can be avoided.

Description

technical field [0001] This application relates to the field of optical signal processing, in particular to optical signal processors, radars and optical signal processing methods. Background technique [0002] When it is necessary to detect the presence of an object in an area of ​​interest, various laser-based detection techniques are available. [0003] In one application, the detection device emits laser light to the target area. If there is an object in the target area, the laser light is reflected when it reaches the object, and the detection device can receive the reflected light signal. [0004] However, when the detection device is disturbed, the optical signal received by the detection device may fluctuate, and the detection device cannot determine whether it receives the reflected optical signal. Contents of the invention [0005] The present application provides an optical signal processor, a radar, and an optical signal processing method, which can avoid the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/481G01S7/487G01S17/04
CPCG01S7/4816G01S7/4873G01S7/4876G01S17/04
Inventor 丁云毛庆州柳晨光
Owner HUAWEI TECH CO LTD
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