A silicon-based coupling waveguide adjustable optical delay line and method for adjusting optical delay

A technology of coupling waveguide and delay line, which is applied in the field of adjustable optical delay line and optical delay of silicon-based coupled waveguide, can solve the problems of high cost, complex experimental system, and difficulty in implementation, and achieve stable performance and realize delay. Time and time, the effect that is conducive to integration

Active Publication Date: 2022-04-15
浙江知多多网络科技有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the EIT technology uses the quantum coherence effect to eliminate the influence of the medium in the process of electromagnetic wave propagation. The experimental system is complex, the cost is expensive, and it is difficult to realize at room temperature.

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
  • A silicon-based coupling waveguide adjustable optical delay line and method for adjusting optical delay
  • A silicon-based coupling waveguide adjustable optical delay line and method for adjusting optical delay
  • A silicon-based coupling waveguide adjustable optical delay line and method for adjusting optical delay

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] For ease of understanding, the technical principle of the present invention will be described below first. See figure 2 with image 3 , figure 2 It is a schematic diagram of optical signal jumping between two different waveguides based on the principle of coupled waves. As shown in the figure, the principle of coupled waves is that energy is transferred from one waveguide to another waveguide. In a continuous waveguide, optical signals in different modes, such as from TE0 mode to TE4 mode, energy is transmitted from one part of the waveguide to another part, and the energy of one mode is converted into the energy of another mode. However, when two optical waveguides with different dispersion curves intersect at the phase-matched wavelength node, that is, when the mode-field matching and the effective refractive index are both satisfied, the coupling can only be performed when they are close to each other. figure 2 The coordinate diagram in the upper right part is...

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

PropertyMeasurementUnit
sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a silicon-based coupling waveguide adjustable optical delay line, which comprises a racetrack silicon waveguide structure arranged on the upper surface of an SOI substrate, input and output waveguides and a delay control part. According to the coupled wave principle, that is, in two parallel adjacent coupled waveguides with the same parameters and almost no loss, if the phases are matched, the energy exchange can reach 99.9%. After the two waveguides are coupled to each other, the optical signal can be continuously transmitted in the multi-ring racetrack structure, thereby producing an optical delay effect. The characteristics of the phase change material GST are used to realize the control of the light delay time. The dimmable delay line can still make the output bandwidth larger under the premise of compact structure, which is more conducive to integration; the loss is only 2.96dB, the delay time reaches 58.8ps, and multi-level regulation can be realized according to the demand , the overall size is only 0.006mm 2 .

Description

technical field [0001] The invention belongs to the field of silicon-based photonics, and in particular relates to a silicon-based coupling waveguide adjustable optical delay line and an optical delay method. Background technique [0002] Silicon-based photonic devices are research hotspots in recent years, and the delay of optical signals is a basic function in time-domain optical signal processing. Photons cannot be stored, so optical buffering is achieved by delaying the optical signal for a period of time in a light-guiding medium. "Optical cache" can start from two aspects: one is to slow down the propagation speed of light; the other is to extend the optical transmission path. There are two types of all-optical buffers currently proposed: one is slow-optical all-optical buffers; the other is optical fiber delay line or optical fiber ring all-optical buffers. The EIT technology uses the quantum coherence effect to eliminate the influence of the medium in the process o...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/28
CPCG02B6/2861
Inventor 郝然李伊凡金尚忠石岩
Owner 浙江知多多网络科技有限公司
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