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

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...

AI Technical Summary

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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