Beam guide wiring structure, optical scanning device and calibration method thereof

Abstract

The invention provides a beam guide wiring structure, an optical scanning device and a calibration method thereof, which can achieve the purpose of eliminating grating lobes by optimizing the distance between adjacent beam guide branches, but can introduce crosstalk between waveguides. The structure comprises a plurality of beam guiding branches, each beam guiding branch is connected with an input light beam, and phase and intensity modulation is performed on the input light beams through a phase and intensity modulator, so that one of the plurality of beam guiding branches outputs a scanning light beam with a preset phase, preset intensity and a preset scanning direction. Or each beam guiding branch outputs a scanning beam with a corresponding preset phase, preset intensity and preset scanning direction, so that a single-point triggering beam guiding mode and an optical phased array mode are realized. According to the invention, phase and intensity adjustment is carried out on the optical signals of the beam guiding branches through the phase and intensity modulator, so that deviation caused by crosstalk is compensated, and the purpose of eliminating the crosstalk phenomenon of the optical signals between the beam guiding branches is achieved.

Description

technical field [0001] The present invention relates to the technical field of laser radar, and more specifically, relates to a beam guiding wiring structure, an optical scanning device and a calibration method thereof. Background technique [0002] In many applications, multiple sets of dense parallel waveguides / transmission lines are required to realize optical signal transmission. The dense waveguide wiring structure can save chip area and increase chip integration. It can be used for two-dimensional microwave / millimeter wave radar wiring. More importantly, in the optical phased array, the dense waveguide wiring structure can eliminate grating lobes. Although the dense wiring structure has many advantages, when the optical signal transmission is implemented through parallel waveguides / transmission lines in the existing dense wiring structure, crosstalk of the optical signals transmitted between the waveguides usually occurs. Contents of the invention [0003] In view o...

AI Technical Summary

Problems solved by technology

Although the dense wiring structure has many advantages, when the optical signal transmission is realized through parallel waveguides / transmission lines in the existing dense wiring structure, crosstalk between the optical signals transmitted between the waveguides usually occurs

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