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Dynamically adjustable and controllable multimode interference coupler, design method and application

A multi-mode interference and coupler technology, applied in neural learning methods, instruments, biological neural network models, etc., can solve difficulties, reconfigure complex parameters of photonic chips, etc., and achieve the effect of reducing size

Pending Publication Date: 2020-08-04
WESTLAKE UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the network expands to a larger network, it will be very complicated and difficult to reconfigure the photonic chip parameters because too much internal information is involved

Method used

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  • Dynamically adjustable and controllable multimode interference coupler, design method and application
  • Dynamically adjustable and controllable multimode interference coupler, design method and application
  • Dynamically adjustable and controllable multimode interference coupler, design method and application

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Embodiment 1

[0040] figure 1 A dynamically adjustable MMI coupler structure is shown. The MMI coupler includes a substrate, a coupler base body arranged on the supporting substrate, N input waveguides and N output waveguides arranged at the input end and output end of the coupler base body. In this embodiment, the matrix of the multimode coupler is directly made of polymer material (such as commercially mature polymer material ZPU-12 series). The substrate is a common silicon substrate. The refractive index at the communication band 1550nm is 1.47, and the thermo-optic coefficient (thermo-opticcoefficient) is -2×10 -4 ·K -1 . The input and output each have 4 waveguides with a waveguide width of 3 μm. The MMI coupler base has a width of 32 μm, a length of 512 μm, and a height of 3 μm. The electrodes are located above the coupler base, and a total of 20×20 electrode arrays are used for heating. When the electrode is heated so that the temperature rises by 100°C, the refractive index d...

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Abstract

The invention discloses a dynamically adjustable and controllable multimode interference coupler. The coupler comprises a coupler body. The coupler body comprises a supporting substrate, a coupler base body arranged on the supporting substrate, a plurality of input waveguides and a plurality of output waveguides, the input waveguides and the output waveguides are arranged on the coupler base body.And the coupler further comprises a dynamic regulation and control element used for regulating and controlling a refractive index of the coupler base body. Based on a MMI coupler, compared with an MZI array structure, the coupler has advantages that the coupler is simple in structure, and only one optical element (MMI) can achieve computing power which can be achieved by an array composed of dozens of MZIs; the coupler is insensitive to a temperature change and can be applied to occasions with the large temperature change; a bandwidth is wide, a design is more flexible, and applicability is stronger; and the coupler is insensitive to machining errors so that machining is simpler.

Description

technical field [0001] The invention relates to optical artificial intelligence, hardware realization of quantum computing and neuromorphic computing, in particular to a dynamically adjustable multi-mode interference coupler, design method and application. Background technique [0002] In recent years, great progress has been made in the fields of artificial intelligence, quantum computing, and neuromorphic computing, and the requirements for computing hardware are getting higher and higher. Optical chips have become one of the important directions of next-generation computing hardware due to their parallel computing capabilities and low power consumption. The important function of optical computing chips is to execute linear calculators (linear operators), which act as logic gates in quantum operations, as weights and sums (synapses / axons) in neuromorphic computing, and as Matrix multiplication unit. The realization of linear operators in the optical domain is a hot resea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/01G06N3/08
CPCG02F1/011G06N3/084
Inventor 曲俞睿张紫阳仇旻
Owner WESTLAKE UNIV
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