An on-chip optical power beam splitter design method

Abstract

The invention provides a design method of an on-chip optical power splitter. The method comprises the following steps: a function and a coupling region of a device is determined; the coupling region is subjected to grid division on the X-axis and Y-axis planes and is divided into cubes; each cube has two possible states, either silicon material or air; all the cubes are set as silicon material, one of the cubes is picked randomly and the state of the cube is converted, the total energy of each output terminal and the splitting ratios of different terminals before and after conversion are calculated; if the total energy of the output terminal after conversion is increased and the splitting ratios of different terminals are closer to a target splitting ratio, the state of the cube is maintained; otherwise, the state of the cube is turned back to the original state; and the next cube is picked randomly, and the above process is repeated until the certain function is satisfied. The method can achieve automatic design with any splitting ratio and multiple outputs on any semiconductor material. The method is simple and reduces the design period.

Description

technical field [0001] The invention belongs to the technical field of integrated silicon photonics, and in particular relates to a design method of an on-chip optical power beam splitter. Background technique [0002] In recent years, with the explosive development of Internet services such as cloud storage, cloud computing, and big data, data centers are in urgent need of large-scale deployment. While optical interconnection has gradually become the mainstream technology for data center interconnection, integrated optoelectronic chips as the core of optical interconnection are attracting more and more attention. The device size of the integrated optoelectronic chip directly determines the port density and power consumption of the panel. In addition, the flexibility and reconfigurability of each device on the chip is also critical. Among them, the optical power beam splitter is a basic device widely used in various on-chip functional units. Multi-mode interference optica...

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Problems solved by technology

In order to realize a beam splitter with any splitting ratio, it is reported that a specially designed MMI can realize a single-input and double-output grating coupler with any splitting ratio, but this coupler only reports a single-input and double-output, and cannot realize More output splitting ratio

Directional couplers can also achieve arbitrary splitting ratios, but they are large in size, narrow in operating bandwidth, and poor in process tolerance. Multi-output splitting needs to be realized through cascading, which increases the difficulty of device design and fabrication.

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