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Spot converter

A converter and mode spot technology, applied in the field of optical communication, can solve the problems of limited thickness of BOX isolation layer, high process complexity, large coupling loss, etc., and achieve the effects of improving mechanical properties, wide application prospects, and reducing impact

Pending Publication Date: 2021-06-01
WUHAN HUAGONG GENUINE OPTICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Suspended structure due to the need to hollow out the SiO 2 The material at the bottom and surrounding of the waveguide has high process complexity and only relies on SiO 2 The suspension wall supports the entire waveguide structure, and the mechanical properties and device reliability will be a big problem; and the inverted cone structure, due to the limited thickness of the BOX isolation layer, when the light spot is large, the substrate will cause deformation of the light spot and leakage loss , and when the spot is small, the coupling mismatch with the fiber spot is large, resulting in a large coupling loss

Method used

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Embodiment 1

[0027] see Figure 1 to Figure 3 , an embodiment of the present invention provides a speckle converter, including a substrate 1, on which a lower cladding layer 2 and a covering layer 6 are sequentially arranged from bottom to top, and the upper end of the lower cladding layer 2 is arranged from bottom to top The bottom inverted tapered waveguide and the first layer waveguide structure 4 are provided in sequence, and the bottom inverted tapered waveguide and the first layer waveguide structure 4 are located in the cover layer 6 . The lower surface of the cladding layer 6 is connected to the upper surface of the lower cladding layer 2 , and closes and surrounds the bottom inverted tapered waveguide and the first-layer waveguide structure 4 . The width of the bottom inverted tapered waveguide 3 gradually decreases from left to right.

[0028] The first-layer waveguide structure 4 of the present invention has two different schemes, and one of them can be selected according to ne...

Embodiment 2

[0036] see Figure 2 to Figure 7 , on the basis of the first embodiment, the speckle converter of the embodiment of the present invention further includes a second-layer waveguide structure 5 located in the cladding layer 6 . The lower surface of the cladding layer 6 is connected to the upper surface of the lower cladding layer 2 , and closes and surrounds the bottom inverted tapered waveguide, the first-layer waveguide structure 4 and the second-layer waveguide structure 5 .

[0037] The second-layer waveguide structure 5 of the present invention has two different schemes, and one of them can be selected according to needs.

[0038] One solution of the second layer waveguide structure 5 is: the second layer waveguide structure 5 includes a second layer tapered waveguide 51, a second layer inverted tapered waveguide 53, the second layer tapered waveguide 51, the second layer Layers of inverted tapered waveguides 53 are located on the same plane, and the right surface of the s...

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Abstract

The invention relates to a spot converter which comprises a substrate, the substrate is sequentially provided with a lower cladding and a covering layer from bottom to top, the upper end of the lower cladding is sequentially provided with a bottom-layer inverted-cone-shaped waveguide, a first-layer waveguide structure and a second-layer waveguide structure from bottom to top, and the bottom-layer inverted-cone-shaped waveguide, the first-layer waveguide structure and the second-layer waveguide structure are located in the covering layer. The bottom-layer inverted-cone-shaped waveguide and the first-layer conical waveguide of the first-layer waveguide structure form a first light field transition structure, and the first-layer inverted-cone-shaped waveguide of the first-layer waveguide structure and the second-layer conical waveguide of the second-layer waveguide structure form a second light field transition structure. And the second-layer inverted conical waveguide of the second-layer waveguide structure and the covering layer form a spot expansion structure. According to the invention, the bottom-layer inverted-cone-shaped waveguide and the two groups of biconical waveguides are adopted to realize the pull-up effect of a light field, the influence of a substrate silicon material on the shape of a spot is reduced, the amplification function of the spot is realized through a top inverted conical waveguide, and the coupling efficiency with a standard single-mode fiber is improved.

Description

technical field [0001] The invention belongs to the technical field of optical communication, and in particular relates to a speckle converter. Background technique [0002] In recent years, the rapid development of services such as cloud services, 5G communications, and high-definition television has placed great demands on communication speed and capacity. Optical communication has the advantages of high bandwidth, high speed and low cost by loading the transmission signal on the optical carrier and using optical fiber as the medium for transmission, which has made a revolutionary development in the field of communication. Among them, silicon photonics technology is a research hotspot in the field of optical communication. Due to the characteristics of high refractive index difference, the size of optical devices has been reduced by one or even several orders of magnitude compared with traditional optical devices. In addition, due to The silicon photonics process can be c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/14G02B6/12
CPCG02B6/12G02B6/14G02B2006/12083G02B2006/12152
Inventor 李春生周秋桂胡云石文虎张天明
Owner WUHAN HUAGONG GENUINE OPTICS TECH