A non-disruptive control method for tunable wavelength division multiplexing system based on silicon-based waveguide grating

A waveguide grating and wavelength division multiplexing technology, applied in the field of non-stop control, can solve the problems of limited bandwidth tuning range, large refractive index difference, etc., and achieve the effect of large tolerance, low cost and low loss

Active Publication Date: 2021-03-23
ZHEJIANG UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] Based on the advantages of silicon material itself, such as large refractive index difference, low loss, low cost, and manufacturing process compatible with CMOS technology, the current exploration of uninterrupted tunable WDM systems has also achieved certain results, such as based on the microring structure The tunable WDM system uses the thermo-optic effect of the micro-ring to ensure the stability of adjacent channels. Although it can also realize the uninterrupted operation of each channel, the micro-ring filter is limited by FSR, resulting in a limited bandwidth tuning range. limit, and the micro-ring will cause phase changes during the adjustment process, so there are many limitations in practical applications

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  • A non-disruptive control method for tunable wavelength division multiplexing system based on silicon-based waveguide grating
  • A non-disruptive control method for tunable wavelength division multiplexing system based on silicon-based waveguide grating
  • A non-disruptive control method for tunable wavelength division multiplexing system based on silicon-based waveguide grating

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Such as figure 1 , figure 2 As shown, the wavelength division multiplexer of the present invention is realized based on a silicon-based waveguide grating, including a cascade of multi-stage tunable filters, and each stage of tunable filter is composed of two stages of the same Bragg grating filter cascade, said The Bragg grating filter can be a grating-assisted filter or a multimode waveguide grating filter; such as figure 1 , 2 In the example, the grating-assisted filter is used, image 3 In the example, a multimode waveguide grating filter is used. The grating-assisted filter is taken as an example to describe in detail below.

[0025] Each stage of tunable filter includes two stages of Bragg grating filter (grating-assisted filter) with the same structure, the first curved waveguide 6, the second curved waveguide 9, and the third curved waveguide 7; eac...

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Abstract

The invention discloses a non-disruptive control method based on a silicon-based waveguide grating adjustable harmonic division multiplexing system. The system is implemented based on a silicon-basedwaveguide grating and comprises multiple tunable filter cascades, wherein each tunable filter consists of two identical Bragg grating cascades, and two adjacent tunable filters are connected through single-mode waveguide; the first-stage Bragg grating filter, the second-stage Bragg grating filter and the second curved waveguide in each tunable filter are covered with metal electrodes, respectively; and the on and off of the download channel of each tunable filter can be controlled by controlling the voltage of the metal electrodes. The control method provided by the invention does not affect other filters when adjusting the working wavelength of any filter, and can achieve non-disruptive regulation. In addition, the invention is manufactured by a planar integrated optical waveguide process, which is completed in one etching, easy to manufacture, low in cost, small in loss, and good in performance.

Description

technical field [0001] The invention relates to a non-interrupted control method for a tunable wavelength division multiplexing system, mainly relates to a silicon-based waveguide grating filter, and in particular to a non-stop control method for a tunable wavelength division multiplexing system based on a silicon-based waveguide grating method. Background technique [0002] In recent years, with the rapid development of integrated photonics, silicon-based integrated photonic devices have become an important research direction. In the field of silicon-based integrated photonic devices, silicon-based waveguide grating devices have attracted more and more attention. A large number of achievements have been made in the research on the theory, formation mechanism, manufacturing method and application of silicon-based waveguide gratings. It has the characteristics of simple structure, easy integration, and compatible manufacturing process with existing mature CMOS processes, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/293
CPCG02B6/293G02B6/29304G02B6/29322G02B6/2938
Inventor 余辉王肖飞江晓清杨建义
Owner ZHEJIANG UNIV
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