A three-port optical circulator with high transmission rate and high isolation by introducing compensation column
A high-transmission, high-isolation technology, applied in instruments, optics, nonlinear optics, etc., can solve problems such as photonic crystal magneto-optical circulators, which are rarely studied, achieve excellent signal return, improve work performance, and eliminate signal interaction The effect of crosstalk
Inactive Publication Date: 2019-04-23
欧阳征标 +1
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So far, people have studied several kinds of photonic crystal magneto-optical circulators, but most of them are based on the structure of dielectric substrate-air cylinder, and the research on another kind of photonic crystal magneto-optical circulator of air substrate-dielectric cylinder is even worse. few
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[0027] Such as figure 1 As shown, the present invention introduces a three-port optical circulator with high transmission rate and high isolation of the compensation column, including a low-refractive-index background medium, the low-refractive-index background medium is an air background 00, and a triangular lattice is formed in the air background 00 The two-dimensional photonic crystals of the first dielectric material columns 01 arranged in an array, each first dielectric material column 01 occupies a lattice of the triangular lattice, and the lattice constant a of the photonic crystal is selected as 10.0mm, and the first Dielectric material column 01 is made of silicon material, the refractive index is 3.4, its cross-sectional shape is circular, and its radius is r 1 = 2.0 mm. In the photonic crystal, three cross-connected photonic crystal waveguides with an angle of 120° between them, the photonic crystal waveguide starts from the center position of the photonic crystal ...
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Abstract
A compensation-column-introduced three-port optical circulator having high transmission rate and isolation. The three-port optical circulator comprises three photonic crystal cross waveguides corresponding to three ports (11, 12, 13) respectively, wherein the three ports (11, 12, 13) are distributed on the periphery of a photonic crystal. A second dielectric material column (02) is arranged at the cross part of the central axes of the three photonic crystal waveguides. Three identical magneto-optic material columns (A, B, C) are arranged on the most adjacent parts of the second dielectric material column (02) and distributed on the periphery of the cross center of the three cross waveguides in a 120-degree-angle rotation symmetric mode. Three identical third dielectric material columns (03), namely, compensation columns, are arranged on the secondary adjacent parts of the second dielectric material column. The three compensation columns are distributed on the periphery of the cross center of the three cross waveguides in a 120-degree-angle rotation symmetric mode. An electromagnetic wave signal is input from the port of any waveguide and output from the port of the next adjacent waveguide, and another port is in an isolated state to form one-way circular transmission. Therefore, the three-port optical circulator is compact in structure and facilitates the integration of other photonic crystal devices.
Description
technical field [0001] The invention belongs to the technical field of photonic crystal circulators, and in particular relates to a three-port photonic crystal circulator with a plurality of magneto-optical material columns coupled by introducing compensation columns. Background technique [0002] With today's rapid development of all-optical information processing technology, compact and easy-to-integrate photonic crystal devices have attracted extensive attention and research in large-scale integrated optical systems. Photonic crystal is a kind of micro-material whose permittivity or permeability is arranged periodically or quasi-periodically in space, which can prevent electromagnetic waves of a certain frequency band from propagating in it, thus forming a photonic band gap. So far, a variety of microdevices based on photonic crystals have been developed and developed one after another, such as high-Q microcavities, fiber optic detectors, microwave filters, high-efficienc...
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IPC IPC(8): G02F1/095
CPCG02F1/095
Inventor 欧阳征标王琼
Owner 欧阳征标