Waveguide grating device with uniform channel loss

Abstract

The invention discloses a waveguide grating device with uniform channel loss. The waveguide grating device comprises at least one input waveguide, an input flat-plate waveguide area, a grating unit array, an output flat-plate waveguide area and an output waveguide array, wherein after being transmitted by the output flat-plate waveguide area, a central emergent light of each unit in the grating unit array is biased from the center of the output waveguide array according to a certain angle distribution function variation, so as to disperse the distribution of light peak energy output by each unit in the grating unit array on the output waveguide array; therefore, the non-uniformity of the insertion loss of each output channel is enhanced. According to the invention, without changing each component of the traditional waveguide grating device, a problem that a 3dB difference is available between a maximum value and a minimum value of the insertion loss of each output channel of the traditional waveguide grating device within a free spectral range is solved; and the waveguide grating device with the uniform channel loss, disclosed by the invention, is suitable for various waveguide materials and waveguide structures based on silicon dioxide, indium phosphide, silicon and the like and has the advantages of simplicity for making, low cost and so on.

Description

technical field [0001] The invention relates to an integrated array waveguide grating device, in particular to a waveguide grating device with uniform channel loss. Background technique [0002] Integrated optical waveguide grating wavelength division multiplexing devices mainly include arrayed waveguide grating (abbreviated as AWG) and etched diffraction grating (abbreviated as EDG). Among them, the arrayed waveguide grating is one of the core devices to realize the wavelength division multiplexing function in the optical communication system due to its compact structure, easy integration, excellent performance, and high reliability. An N×N AWG can simultaneously transmit N different optical frequencies on each of its output channels, which greatly improves the transmission capacity of the optical transmission system, so it is also an optical division and difference multiplexer and an N×N optical router core components of the system. However, since the difference between ...

AI Technical Summary

Problems solved by technology

[0005] In view of the deficiencies in the background technology, the object of the present invention is to provide a waveguide grating device with uniform channel loss, which solves the gap between the maximum value and the minimum value of the insertion loss of each output channel of the traditional arrayed waveguide grating and etched diffraction grating in a free spectral range. Problems with a 3dB difference between