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1*N demultiplexer/multiplexer optimization method

An optimization method and combiner technology, applied in design optimization/simulation, instruments, special data processing applications, etc., can solve problems such as high production process accuracy requirements and complex structure, and achieve the effect of avoiding poor optimization results

Active Publication Date: 2017-04-26
SOUTHEAST UNIV
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Problems solved by technology

However, the structure generated by the reverse design method is very complex, and there are many irregularly shaped air holes on the silicon substrate, which requires high precision in the production process

Method used

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  • 1*N demultiplexer/multiplexer optimization method
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  • 1*N demultiplexer/multiplexer optimization method

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Embodiment 1

[0033] A method for optimizing a 1×N demultiplexer / combiner, which is applied to the optimization of a 1×21310nm / 1550nm demultiplexer / combiner, comprising the following steps:

[0034] Step 1 Determine the performance requirements, size requirements and process conditions of the 1×21310nm / 1550nm wavelength demultiplexer, the performance requirements are at 1310nm and 1550nm wavelengths, when the power input to the input port is unit power, the output to the output port 1 target power a 11 and a 12 1 and 0, respectively, the target power output to output port 2 a 21 and a 22 are 0 and 1 respectively; the size requirement is the maximum size of the rectangular coupling area, where the maximum length L of the rectangular coupling area max 5000μm, maximum width W max is 50 μm; the process conditions include two parts, the first part is the refractive index of each part of the waveguide, where the substrate refractive index n s is 1.4444, the core refractive index n o is 1.46...

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Abstract

The invention discloses a 1*N demultiplexer / multiplexer optimization method. The 1*N demultiplexer / multiplexer optimization method comprises the following steps: step 1, determining a performance requirement, a dimensional requirement and a process condition of a 1*N demultiplexer / multiplexer; step 2, carrying out mode analysis by employing a finite element method, determining widths of input and output waveguides, and an initial width of a rectangular coupling area, and selecting a shape and a dimension of an available etching element from a geometric library; step 3, determining optimization dimension parameters and optimization times of the rectangular coupling area, respectively carrying out optimization on the rectangular coupling area under the optimization dimension parameters, then calculating a value of a spectrum objective function, and taking the optimization dimension parameter with the least spectrum objective function value as the dimension parameter of the rectangular coupling area; and step 4, according to the shape and the dimension of the available etching element, dividing the rectangular coupling area into a plurality of square grids, determining a processing scheme of each square grid on the rectangular coupling area according to a manner of being from left to right and from middle to two sides, and at last determining a geometric structure of the rectangular coupling area.

Description

technical field [0001] The invention belongs to the field of photonic device design and relates to an optimization method for a 1×N wave splitter / multiplexer. Background technique [0002] Traditional photonic devices include directional couplers, multimode interference couplers, distributed Bragg reflectors, microring resonators, and grating couplers, etc. At present, most of these photonic devices are manually designed according to the designer's professional knowledge and intuition, the parameter space that can be adjusted is small, and large-scale automated design cannot be performed. [0003] The existing optimization algorithms for photonic device design include genetic algorithm, particle swarm optimization algorithm and level set algorithm. These optimization algorithms are mainly used to fine-tune the existing structure, but cannot replace the designer for structural design. [0004] In order to expand the parameter space of the design, a method of reverse design i...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 孙小菡管孟文蒋卫锋
Owner SOUTHEAST UNIV
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