Device for stabilizing spectrum of micro-ring resonator

Abstract

The invention discloses a device for stabilizing a spectrum of a micro-ring resonator. After a current is input into a PIN junction of the micro-ring resonator, a voltage driving signal used for stabilizing the spectrum of the micro-ring resonator is generated by detecting the variation, caused by temperature changes of the micro-ring resonator, of the voltages at the two ends of the PIN junction of the micro-ring resonator and processing the voltage vibration through a signal processing unit and an FPGA control unit, and therefore the device has the advantages of being simple in design process and easy to operate. In practical configuration, the PIN junction detects working temperatures of all micro-ring switches in real time, the problem that positioning can not be conducted due to the fact that the number of micro-rings is large is solved, no additional functional devices are needed, the device has the advantages of being high in temperature detection speed and low in cost, and the device can meet the requirements of a current optical communication system for high-speed development.

Description

technical field [0001] The invention belongs to the technical field of optical communication, and more specifically relates to a device for stabilizing the spectrum of a microring resonator. Background technique [0002] With the development of optical communication systems in the direction of high speed, high capacity, low loss, and low cost, higher and higher requirements are placed on optical devices. In recent years, with the improvement of optical waveguide technology, photonic integration technology has attracted much attention. Microring resonators have the advantages of high quality factor (Q value), compact structure, high integration, and compatibility with existing CMOS processes, and have broad application prospects in optical communication networks. [0003] In silicon-based materials, the main physical effects are carrier dispersion effect, thermo-optic effect and so on. The carrier dispersion effect refers to the change of the refractive index due to the cha...

AI Technical Summary

Problems solved by technology

Composite optical integrated devices developed in recent years can realize optical devices with stable temperature properties by using their special material properties that are not sensitive to temperature. However, the processing technology of composite materials is not compatible with CMOS technology, and the cost is high.

Therefore, in silicon-based materials, in order to achieve precise control of the operating temperature of the microring resonator, a metal film is used to cover the microring device for heating, although the existing processing technology has been able to combine the microheater and the PIN junction It is made in the microring resonator chip, but it cannot integrate a temperature sensor in the microring chip, detect the working temperature of the microring chip, and stabilize the spectrum of the microring resonator through the amount of temperature change

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