Quantitative Analysis Of WDM-based Thermo-Optical Effects In ONoC

With the continuous enrichment of people's living needs and the continuous improvement of people's living quality,the traditional single-core bus structure has been difficult to meet the people's demands for better processing performance and more stable processing capabilities.The business is mainly customer-oriented,and the demand for products is paramount.Changes in people's demands force the unceasing development and advancement of the chip technology.The on-chip networks has attracted researcher's attention with the unceasing increase of on-chip integration in the multi-core systems.It breaks through bottlenecks in the delay,bandwidth,power consumption,and other aspects of the traditional high-frequency single-core communications by means of the on-chip networks interconnected communications,and significantly improving the performance of CPU.However,with the further increase in integration density,the inherent parasitic effects of traditional on-chip networks due to their metal interconnection methods have caused functional confusions in data transfer,power consumption,synchronization,and reusability.In some severe cases,it may even cause the entire circuit to crash.Therefore,the on-chip networks based on optical interconnection has emerged at this time.Optical networks-on-chip(ONoCs)is a new promising communication paradigm that upgrades the traditional on-chip networks(NoCs)with the ultra-high communication bandwidth and low latency.However,the emergence of optical networks-on-chip is benefited from the breakthrough development of silicon photonics technology and on-chip optical devices.As an optical device,thermal sensitivity is one of the intrinsic properties of the on-chip optical devices,and its performance will have some certain fluctuations with the effect of temperature variation,which will in turn affects the performance and applicability of the optical network.Therefore,the influence of temperature on the performance of optical networks-on-chip is an indispensable part of its research process.Silicon microring resonators(MRRs)are one of the basic elements of the on-chip optical devices in ONoCs.The MRRs work on the whole communication process of the ONoCs.In an on-chip integrated laser,it can assist the laser in selecting the light to emit;In the on-chip integrated optical router,it is used to achieve the redirection of the optical signal;In an on-chip integrated modulator,it helps the modulator convert the incident light into standard signal light.At the same time,it is also the origin of the thermal sensitivity of on-chip optical devices.MRRs are inherently sensitive to temperature due to the effects of the fabricated material,which makes it have pronounced thermo-optic effects.And the thermo-optic effects are one of the most important aspects for studying the thermo-optic effects of the ONoCs.Because for the MRRs,its basic fuction is to implement selection and redirection of the fixed wavelength light,which requires a strong invariance of the resonance wavelength that can drive the MRRs to work.But,the resonance wavelength of the MRRs will cause thermal drift when its ambient temperature changes,which will cause its original working mechanism to be broken.And then,the performance of the on-chip optical devices and the ONoCs will be affected.So,in order to enhance thermal stability,studying its thermo-optic effects is the only way to achieve this goal.In the research process,the thermo-optic effect of MRRs is one of the most critical step.In this thesis,we systematically studied and analyzed the thermo-optic effects of the MRRs,and quantitatively described the effects of temperature on its resonance wavelength and optical losses by establishing the corresponding thermo-optic effects models.For the different properties of the two different MRRs,we propose the corresponding formula relational models.Firstly,the relationship model between the resonance wavelength of the MRRs and the temperature is proposed,which is applicable to both structures.Then,a model for the relationship between the optical losses of the parallel microring resonators(PMRs)and the temperature is addressed.For the crossing microring resonators(CMRs),we systematically propose a model to describe the relationship between the optical losses ratio of two MRRs and the temperature.To a certain extent,the work made up for the lack of researches on the optical losses of the CMRs with temperature changes.The relation models and results presented in this thesis are systematically verified using professional optics methodology,and can be widely applied for accurate and efficient analysis of the thermo-optic effects in different domains of the ONoC community.