Chromatic dispersion control method for integrated optical waveguide and integrated optical waveguide

Abstract

The embodiment of the invention discloses a chromatic dispersion control method for an integrated optical waveguide and an integrated optical waveguide. According to the control method, respective width values of a first waveguide and a second waveguide are controlled according to an operating waveband, so that effective refractive indexes of a fundamental mode of the first waveguide and a second-order mode of the second waveguide are equal at the operating waveband; and a coupled chromatic dispersion value reaches a target chromatic dispersion value based on control of the spacing distance between the first waveguide and the second waveguide. On the basis of a mode coupling principle, chromatic dispersion value controlling is realized by adjusting the width space between waveguide cores. Compared with the traditional method for optical waveguide dispersion control based on the waveguide cross section shape and dimension, the chromatic dispersion control method disclosed by the invention has no special requirement on the process and has high compatibility because only the parameters of the integrated optical waveguide at the width dimension need to be adjusted. The chromatic dispersion control method can be applied to most of application occasions including the technical field of fables design.

Description

technical field [0001] The invention relates to the technical field of integrated photonics, in particular to a dispersion control method suitable for an integrated optical waveguide and the integrated optical waveguide. Background technique [0002] Dispersion control of integrated optical waveguides is of great significance for many nonlinear applications on a chip, such as monolithic integrated optical frequency comb generation, supercontinuum generation, and quantum information processing, etc. Dispersion control fundamentally determines the performance of these systems. [0003] For integrated optical waveguides, the typical dispersion control method is to adjust the cross-sectional shape and overall size of the waveguide. However, this traditional method cannot solve all the dispersion control problems of optical waveguides, and cannot be applied in many occasions. For example, due to lattice mismatch and other reasons, the growth thickness of many thin films is limite...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is how to solve the problem that the existing method of controlling the dispersion of the optical waveguide by controlling the shape and size of the cross-section of the waveguide is limited by the production process and cannot realize the large-scale control of the dispersion value

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