Optical coupling device

Abstract

The invention provides an optical coupling device, which includes a substrate, a slab optical waveguide formed on the substrate, a dielectric grating formed on the slab optical waveguide, and a dielectric grating arranged on the dielectric grating parallel to the dielectric grating. The modulating electrode and two ground electrodes are arranged on the planar optical waveguide parallel to the dielectric grating and respectively located on both sides of the dielectric grating. The flat optical waveguide is used for docking with a laser light source to receive the laser beam emitted by the laser light source. The dielectric grating is arranged parallel to the incident direction of the laser beam, and forms a diffraction-type optical waveguide lens with the flat optical waveguide to converge the laser beam. A modulation electric field is loaded between the modulation electrode and the two ground electrodes to change the refractive index of the flat optical waveguide through the electro-optic effect, thereby changing the focal length of the diffractive optical waveguide lens. In this way, the laser beam can be effectively focused into an optical component.

Description

technical field [0001] The invention relates to an integrated optical device, in particular to an optical coupling device. Background technique [0002] In integrated optics, the coupling of light sources and optical components needs to be considered: although integrated optics generally use lasers with better directionality as light sources, the beams emitted by lasers still have a certain divergence angle. If the light source and optical components are directly connected Docking, the divergent light in the beam will not be able to enter the optical components, and the light utilization rate is low. Therefore, how to couple the light source to the optical component so that the divergent light beam converges into the optical component to improve light utilization is an important issue. Contents of the invention [0003] In view of this, it is necessary to provide an optical coupling device that can improve light utilization. [0004] An optical coupling device comprising...

AI Technical Summary

Problems solved by technology

[0002] In integrated optics, the coupling of light sources and optical components needs to be considered: although integrated optics generally use lasers with better directionality as light sources, the beams emitted by lasers still have a certain divergence angle. If the light source and optical components are directly connected Docking, the divergent light in the beam will not be able to enter the optical components, and the light utilization rate is low

Images