Integrated phased array laser radar system

A laser radar and phased array technology, applied in radio wave measurement systems, instruments, etc., can solve the problem of small receiving optical antenna area of ​​silicon-based antenna array, low output power of semiconductor laser, and inability of integrated phased array laser radar system Work and other problems, to achieve the effect of fast modulation and suppression of interference

Active Publication Date: 2019-11-15
UNITED MICROELECTRONICS CENT CO LTD
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Problems solved by technology

[0004] Aiming at the defects existing in the prior art, the present invention provides an integrated phased array laser radar system, which aims to solve the problem of the low output power of a single

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  • Integrated phased array laser radar system
  • Integrated phased array laser radar system

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Embodiment Construction

[0016] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not intended to limit the invention.

[0017] Reference will now be made in detail to embodiments of the invention, examples of which are illustrated in the accompanying drawings. The suffixes "module" and "unit" of elements are used here for convenience of description, and thus may be used interchangeably without any distinguishable meaning or function.

[0018] Although all elements or units constituting an embodiment of the present invention are described as being incorporated into a single element or operated as a single element or unit, the present invention is not necessarily limited to such an embodiment. According to ...

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Abstract

The invention discloses an integrated phased array laser radar system comprising a laser phased array transmitting module, a coupled grating array receiving module, and a coherent detection module. The laser phased array transmitting module includes a coherent laser light source and a laser emission phased array. The coupled grating array receiving module includes an imaging optical system and a coupled grating array; the imaging optical system converges echo laser reflected from different object space target points to a corresponding position point on a focal plane in image space; and the incident surface of the coupled grating array is located on the focal plane in image space of the imaging optical system. The coherent detection module includes a branch waveguide, a bus waveguide, localoscillator light, and a waveguide photoelectric detector. According to the invention, the integrated phased array laser radar system has advantages of fast scanning speed, small size, high system integration, low cost, long detection distance, and strong noise suppression ability.

Description

technical field [0001] The invention belongs to the technical field of phased array laser radar systems, in particular to an integrated phased array laser radar system. Background technique [0002] In the existing silicon-based waveguide phased-array lidar, a narrow-linewidth laser is used as the light source, and the output laser beam is guided into the silicon-based waveguide by an optical coupler. The laser light wave is transmitted in the silicon-based waveguide and finally reaches each An array element composed of a silicon-based phase shift unit and a silicon-based antenna, each phase shift unit is composed of a thermal electrode and a silicon-based waveguide, which is controlled by the system program control chip, by changing the electrical signal loaded on the phase shift unit , and then change the temperature of the hot electrode in the phase shift unit; due to the thermo-optic effect of the silicon material, the refractive index of the silicon-based waveguide in t...

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Application Information

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IPC IPC(8): G01S7/481
CPCG01S7/4817
Inventor 林霄丁子瑜胡小燕张东亮刘大川王伟平
Owner UNITED MICROELECTRONICS CENT CO LTD
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