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Two-dimensional photonic-crystal optical router based on nested ring cavity structure

A two-dimensional photonic crystal and ring cavity technology, which is applied in the field of optical communication systems, can solve problems such as difficult implementation and high structural complexity, and achieve the effects of easy implementation, flexible functions, and improved drop-path efficiency

Active Publication Date: 2017-11-24
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This structure can achieve higher drop efficiency, but due to the heterogeneous structure, the entire structure is more complex and difficult to implement

Method used

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  • Two-dimensional photonic-crystal optical router based on nested ring cavity structure
  • Two-dimensional photonic-crystal optical router based on nested ring cavity structure
  • Two-dimensional photonic-crystal optical router based on nested ring cavity structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment is used for forward and backward downlink output of single-wavelength 1680nm input light.

[0033] The entire optical router structure is attached figure 1. It is a two-dimensional photonic crystal with a triangular lattice dielectric pillar structure. The entire structure is an array of 2721 dielectric pillars. The background material is air. The dielectric pillar material is commonly used silicon material (refractive index n=3.46), and the lattice constant a=0.6245μm , the medium column radius R=0.12μm. In the complete photonic crystal, the upper and lower sixth rows of dielectric pillars are respectively removed to form two horizontal waveguides 1 and 2 . In the middle of the two horizontal waveguides is a nested ring resonant cavity structure 3, and the outer large dielectric column arrangement structure 3.1 has 7 dielectric columns in the horizontal direction and 5 dielectric columns in the four side directions; the inner small dielectric column a...

Embodiment 2

[0035] This embodiment is used for dual-wavelength light, that is, forward and backward output of 1550nm and 1680nm input light.

[0036] The entire optical router structure is attached figure 1 . It is a two-dimensional photonic crystal with a triangular lattice dielectric pillar structure. The entire structure is an array of 2721 dielectric pillars. The background material is air. The dielectric pillar material is commonly used silicon material (refractive index n=3.46), and the lattice constant a=0.6245μm , the medium column radius R=0.12μm. In the complete photonic crystal, the upper and lower sixth rows of dielectric pillars are respectively removed to form two horizontal waveguides 1 and 2 . There is a nested resonant cavity structure 3 in the middle of the two horizontal waveguides, and the outer large dielectric column arrangement structure 3.1 has 7 dielectric columns in the horizontal direction and 5 dielectric columns in the four side directions; the inner small d...

Embodiment 3

[0038] This embodiment is used for dual-wavelength light, that is, the forward and backward output of 1700nm and 1720nm input light, and can realize the function of switching the output directions of the two resonant wavelengths.

[0039] The entire optical router structure is attached figure 1 . It is a two-dimensional photonic crystal with a triangular lattice dielectric pillar structure. The entire structure is an array of 2721 dielectric pillars. The background material is air. The refractive index of the dielectric pillar material is n=3.6, the lattice constant a=0.6245μm, and the radius of the dielectric pillar R= 0.12 μm. In the complete photonic crystal, the upper and lower sixth rows of dielectric pillars are respectively removed to form two horizontal waveguides 1 and 2 . There is a nested resonant cavity structure 3 in the middle of the two horizontal waveguides, and the outer large dielectric column arrangement structure 3.1 has 7 dielectric columns in the horizo...

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Abstract

The invention relates to a two-dimensional photonic-crystal optical router based on a nested ring cavity structure. A two-dimensional photonic crystal, which is a triangular lattice medium column structure, is formed by one ring cavity including one large non-equilateral hexagon and one small non-equilateral hexagon which are nested, wherein the ring-shaped cavity is guided in two horizontal input and output waveguides. Several medium columns are distributed in the ring cavity in a central symmetry mode, and the whole structure is distributed symmetrically. An appropriate structure parameter is selected. The router can simultaneously realize forward bottom route and backward bottom route functions of a single wavelength input light wave, the forward bottom route and backward bottom route functions of two wavelength input light waves, and a function of exchanging forward and backward bottom route directions of two wavelengths. Compared to the two-dimensional photonic-crystal optical router of a single ring cavity structure, by using the router of the invention, a bottom route effect is obviously increased and can reach 100%. The router possesses characteristics that the structure is simple; manufacturing is easy; a size is small; cost is low; stability is high; and flexible functions are possessed and so on. The router can be mainly applied to an all-optical integrated loop network.

Description

technical field [0001] The invention relates to a two-dimensional photonic crystal optical router based on a nested ring cavity structure, which is mainly used in optical wavelength division multiplexing communication systems to realize routing selection, and all optical communication systems that need to realize filtering functions. Background technique [0002] With the rapid development of optical communication technology, as the core technology of optical communication system, dense wavelength division multiplexing technology and optical add-drop multiplexing technology have received widespread attention, and the performance of optical routers, one of the core devices of these technologies, directly affects To the quality of the entire communication system, it has become a research hotspot. An optical router is essentially an optical filter, and macroscopically, the output light can be output from different ports of the device. An ideal optical router should have the ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/293G02B1/00
Inventor 张娟刘浩
Owner SHANGHAI UNIV
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