Optical phased array chip transmitter based on metal slit waveguides

Abstract

The invention discloses an optical phased array chip transmitter based on metal slit waveguides. The transmitter is formed by a medium optical waveguide array and a metal plasma slit waveguide array.The interval of the medium optical waveguides is gradually reduced from the left to the right, and the whole medium optical waveguide is of a fan-shaped structure. The interval of the metal plasma slit waveguide array is firstly reduced and then unchanged, and the whole metal plasma slit waveguide array likes a transversely arranged hopper. The right end of the medium optical waveguide array and the left end of the metal plasma slit waveguide array form a whole body structure in a penetrating way, so it is ensured that optical energy is transited to the metal plasma waveguide from the medium waveguide in a low loss manner. According to the invention, by use of the characteristics of weak penetrating ability of light in metal and strong light wave model field constraints, intervals of the plasma waveguides are reduced, the range of output diffraction angle is increased, and the laser scanning angle covering range is increased. The emission end is simple in structure, small in crosstalkbetween waveguides, and big output wave beam deflection angle and has profound application prospects in laser radar field.

Description

technical field [0001] The invention relates to optical phased array technology and on-chip laser radar technology, and belongs to the field of integrated optics. Background technique [0002] Lidar is a new type of active radar integrating modern optical remote sensing, imaging, ranging, tracking and other technologies. It is the product of the combination of traditional radar technology and modern laser technology. Because of the characteristics of high correlation, good monochromaticity and high brightness of laser, the application of laser to radar has the advantages of high resolution, wide measurement range and strong anti-interference performance, so it has attracted extensive attention from researchers. With the maturity of technology and the improvement of manufacturing process, lidar will become an indispensable part of the development of future communication, ranging and other technologies. In addition to military applications, lidar can also be used for navigati...

AI Technical Summary

Problems solved by technology

[0006] It can be seen that the phased array technology based on the dielectric optical waveguide is now used to realize the beam steering. Due to the weak constraint of the waveguide on the optical wave mode field, the distance between the waveguides is relatively large and cannot be smaller than the half-wave wavelength, so the beam scanning angle is small.

Images