Cascade silicon-based waveguide optical isolator

A waveguide optical and isolator technology, applied in the field of dual-frequency silicon-based optical isolators, can solve the problems of additional requirements for optical signal strength, optical isolators are not suitable for large-scale integration, and high isolation rate

Inactive Publication Date: 2016-06-01
SHANGHAI JIAO TONG UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the optical isolator with Faraday rotation effect is not suitable for large-scale integration, and the optical isolator with nonlinear effect has additional requirements on the strength of the transmitted optical signal
Recently

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Cascade silicon-based waveguide optical isolator
  • Cascade silicon-based waveguide optical isolator
  • Cascade silicon-based waveguide optical isolator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The normalized length a=1 μm is taken, and the waveguide width is taken as d=0.22a. The frequency and wavenumber of mode 1 are respectively taken as: ω 1 =0.67(2πc / a), k 1 =1.92(2π / a); the frequency and wave number of mode 2 are taken as: ω 2 =0.5(2πc / a),k 2 =1.31(2π / a); the frequency and wavenumber of mode 3 are selected as: ω 2 =0.8(2πc / a), k 3 =1.01(2π / a). The modulation intensity δ(x)=1, the waveguide is made of silicon material, and the dielectric constant is taken as 12.25. The lengths of the two modulation regions are l c1 = 5.74a and l c2 =6.63a, this length is the complete conversion length of the mode.

[0037] When the frequency is ω 1 = 0.67(2πc / a) and ω 2=0.5(2πc / a) When the mode 1 and mode 2 optical signals propagate from left to right, the modulation 1 region couples mode 1 and mode 3, and the optical signal is converted from mode 1 to mode 3. Then the mode 3 signal is absorbed by the filter 1 area. During this process, the unaffected Mode 2 s...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a cascade silicon-based waveguide optical isolator. The two-stage time-dependent perturbation structure and the two-stage filtering structure can realize the optical signal isolation of the two frequencies. The dual-frequency independent isolation is realized through utilizing the selection frequency of the unparallel portion of two different energy bands in the waveguide dispersion relation in order to realize the dual-frequency independent isolation, and the mutual interaction does not happen in the signal isolation process. The time-dependent perturbation structure is used for coupling the two optical signals of two specific frequencies which is in the forward propagation along the waveguide as the two optical signal of the target frequency which is in the forward propagation along the waveguide; and the specific frequency filtering structure which is in successive series is used for absorbing two target frequency optical signal which is in the forward propagation along the waveguide. The perturbed structure and the filtering structure do not produce effect on the two optical signal with specific frequencies which are propagated in the opposite directions. The scale of the optical isolator is in the micron dimension and is applicable to the mass integration and has no requirement for the signal strength.

Description

technical field [0001] The invention relates to a dual-frequency silicon-based optical isolator, which is suitable for optical fiber communication and integrated optical system, in particular to a silicon-based optical isolator capable of realizing unidirectional propagation of optical signals at two frequencies and nearby frequencies. Background technique [0002] An optical isolator is a passive optical device that allows one-way transmission of optical signals in an optical propagation medium (device), and prevents the propagation of reflected optical signals in optical fiber communication systems and large-scale integrated optical circuits. The working principle of common optical isolators is mainly based on the non-reciprocity and nonlinear effects of Faraday rotation. However, the optical isolator with Faraday rotation effect is not suitable for large-scale integration, and the optical isolator with nonlinear effect has additional requirements on the strength of the tr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G02B6/27
CPCG02B6/2746
Inventor 刘烨赖思南姜淳
Owner SHANGHAI JIAO TONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap