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High-transmission rate, high-return loss and high-isolation photonic crystal optical bridge

A high return loss, photonic crystal technology, used in optical waveguides, optics, light guides, etc., can solve the problems of large volume and cannot be integrated with optical circuits, and achieve the effect of small structure, high extinction ratio, and low insertion loss.

Inactive Publication Date: 2015-09-23
欧阳征标 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditional optical bridges apply the principle of geometric optics, so they are relatively large in size and cannot be used in optical path integration

Method used

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  • High-transmission rate, high-return loss and high-isolation photonic crystal optical bridge
  • High-transmission rate, high-return loss and high-isolation photonic crystal optical bridge
  • High-transmission rate, high-return loss and high-isolation photonic crystal optical bridge

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038]Taking the incident wavelength λ=1.500000 (μm), a=0.504000 (μm), the diameter of the high refractive index background medium column at this time is 0.090720 (μm), and the diameter R11 of the two circular point defects at the input end 1 of the optical signal A and R12 are 0.251601 (μm) and 0.135483 (μm), respectively, and the positions are (-5.800270, 0.974726) (μm) and (-7.883409, 0.967054) (μm); two circular point defects at the input terminal 2 of the optical signal B The diameters R21 and R22 are 0.270967 (μm) and 0.164523 (μm) respectively, and the positions are (4.930629, 0.001354) (μm) and (4.838283, 0.967705) (μm); two circular points at the output end 3 of the optical signal A The diameters R31 and R32 of the defect are 0.251601 (μm) and 0.135483 (μm) respectively, and the positions are (0.974726, 5.800270) (μm) and (0.967054, 7.883409) (μm); The diameters R41 and R42 of point defects are 0.270967 (μm) and 0.164523 (μm), respectively, and the positions are (0.00...

Embodiment 2

[0040] Taking the incident wavelength λ=1.550000 (μm), a=0.520800 (μm), the diameter of the high refractive index background medium column at this time is 0.093744 (μm), and the diameter of two circular point defects 6 at the input end 1 of the optical signal A R11 and R12 are 0.259988 (μm) and 0.140000 (μm) respectively, and the positions are (-5.993548, 1.007217) (μm) and (-8.146190, 0.999290) (μm); two circular points at the input terminal 2 of optical signal B The diameters R21 and R22 of the defect are 0.280000 (μm) and 0.170008 (μm) respectively, and the positions are (5.094984, 0.001400) (μm) and (4.999560, 0.999962) (μm); The diameters R31 and R32 of the point defects are 0.259988 (μm) and 0.140000 (μm) respectively, and the positions are (1.007217, 5.993548) (μm) and (0.999290, 8.146190) (μm); two circles at the output terminal 4 of the optical signal B The diameters R41 and R42 of the point defects are 0.280000 (μm) and 0.170008 (μm) respectively, and the positions a...

Embodiment 3

[0042] Taking the incident wavelength λ=1.600000 (μm), a=0.537600 (μm), the diameter of the high refractive index background medium column at this time is 0.096768 (μm), and the diameter R11 of the two circular point defects at the input end 1 of the optical signal A and R12 are 0.268374 (μm) and 0.144516 (μm), respectively, and the positions are (-6.186888, 1.039707) (μm) and (-8.408970, 1.031525) (μm); two circular point defects at the input terminal 2 of the optical signal B The diameters R21 and R22 are 0.289032 (μm) and 0.175492 (μm) respectively, and the positions are (5.259338, 0.001445) (μm) and (5.160836, 1.032218) (μm); two circular points at the output end 3 of the optical signal A The diameters of defects R31 and R32 are 0.268374 (μm) and 0.144516 (μm) respectively, and the positions are (1.039707, 6.186888) (μm) and (1.031525, 8.408970) (μm); The diameters R41 and R42 of point defects are 0.289032 (μm) and 0.175492 (μm), respectively, and the positions are (0.0014...

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Abstract

The present invention discloses a high-transmission rate, high-return loss and high-isolation photonic crystal optical bridge, and aims to provide a photonic crystal optical bridge which is high in transmission rate and return loss, is convenient to integrate and is efficient. The high-transmission rate, high-return loss and high-isolation photonic crystal optical bridge comprises a photonic crystal with a forbidden band and a photonic crystal waveguide, and also comprises two input ends and two output ends. The two input ends and the two output ends are arranged at the left, upper part, right and lower part of the photonic crystal waveguide respectively, the photonic crystal waveguide is formed by making a photonic crystal vertical waveguide and a photonic crystal horizontal waveguide in crossed intersection in the middle part of the photonic crystal waveguide, and a waveguide defect dielectric cylinder is arranged in a photonic crystal crossed waveguide. Each of the four ports of the photonic crystal waveguide is equipped with two circular defect dielectric cylinders, and a square defect dielectric cylinder is located in the right center of the junction of the vertical waveguide and the horizontal waveguide. Two beams of light signals are inputted from the two input ends of the photonic crystal waveguide respectively, form the light path crossed intersection in a common central area, but are transmitted without the mutual interference, and are outputted from different ports along the straight line directions respectively.

Description

technical field [0001] The invention relates to the field of tiny optical optical bridges, in particular to a photonic crystal optical bridge with high transmission rate, high return loss and high isolation based on photonic crystal technology. Background technique [0002] Traditional optical bridges apply the principle of geometric optics, so they are relatively large in size and cannot be used in optical path integration. Based on photonic crystals, tiny devices can be fabricated, including photonic crystal light bridges. The photonic crystal waveguiding optical path of the optical bridge is generally constructed by introducing line defects into the photonic crystal with complete band gap. We introduce the multiple scattering method: one or more point defects are introduced into the line defects that make up the optical bridge, and they are used as scatterers to generate scattered waves that can cancel the reflected waves propagating in the device, and the positions of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/10G02B6/122
Inventor 欧阳征标黄浩
Owner 欧阳征标
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