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Compact and high-efficiency mode converter and its design method

A design method and converter technology, applied in the direction of optical waveguide, light guide, etc., can solve the problem of long structure length, etc., and achieve the effect of improving optimization efficiency and high-efficiency mode spot conversion

Active Publication Date: 2017-07-11
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a compact high-efficiency pattern converter and its design method, which overcomes the shortcoming of the long length of the traditional linear tapered conversion structure

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  • Compact and high-efficiency mode converter and its design method
  • Compact and high-efficiency mode converter and its design method
  • Compact and high-efficiency mode converter and its design method

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Embodiment Construction

[0018] Such as figure 1 The structure schematic diagram of the compact high-efficiency speckle converter of the present invention is shown.

[0019] The key of the present invention is to use a linear tapered transformation structure with length L to be divided into less segments at equal intervals, and then use step-by-step optimization instead of traditional genetic algorithm to optimize the width of each segment, and then optimize the width of each segment in less segments. On the basis of segment optimization, it is further divided into more segments and continues to optimize until a high conversion efficiency is obtained. Compared with the traditional genetic algorithm, the efficiency of this optimization method is greatly improved. The specific method is:

[0020] Divide the linear tapered transformation structure of length L into n sections with equal intervals, take n=10, L is the target length of the required pattern converter, take L=20 μm, and the width of n sectio...

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Abstract

The invention discloses a compact and high-efficiency model speckle converter and a design method thereof. By dividing a linear tapered transformation structure with length L into fewer equally spaced segments, and then using stepwise optimization instead of traditional genetic algorithms to optimize the width of each segment, and then further based on the optimization of fewer segments Divide into more segments and continue to optimize until a high conversion efficiency is obtained. Compared with the traditional genetic algorithm, the efficiency of this optimization method is greatly improved. The invention adopts the traditional linear tapered conversion structure, and under the same conversion efficiency, can greatly reduce the length of the existing converter from 150 μm to 20 μm, and further improves the integration degree of the chip.

Description

technical field [0001] The invention relates to the technical field of manufacturing silicon-based photoelectric integrated chips, in particular to a mold spot converter and a design method thereof. Background technique [0002] With the rapid development of global optical communication technology, more and more people pay attention to integrated chips for optical signal processing. Many micro-nano integrated devices, such as micro-ring filters, arrayed waveguide gratings, modulators, etc., have been realized on silicon-on-insulator (SOI). In order to effectively couple the optical signal in the communication link into the integrated chip, it is proposed to use a grating coupler to realize the coupling of the optical signal. [0003] But unfortunately, in order to match with single-mode fiber, the width of the grating waveguide needs to be very wide (generally around 12 μm), which will cause mode mismatch with the subsequent single-mode waveguide (typically 0.5 μm in width)...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/14
Inventor 张新亮邹静慧余宇
Owner HUAZHONG UNIV OF SCI & TECH