Thermal investigation of bistability in high index doped silica integrated ring resonators

TL;DR

This paper provides an experimental and theoretical study of thermo-optic effects in high index doped silica micro-ring resonators, revealing key parameters that influence their thermal behavior for integrated photonics.

Contribution

It offers the first comprehensive characterization of thermo-optic parameters in HIDS resonators, comparing them with other common photonic materials.

Findings

Determined thermo-optic coefficient and thermal conductivity of HIDS.

Compared thermo-optic performance of HIDS with silicon, silicon nitride, and silica.

Provided insights for optimizing thermo-optic effects in integrated photonic devices.

Abstract

The utilization and engineering of thermo-optic effects have found broad applications in integrated photonic devices, facilitating efficient light manipulation to achieve various functionalities. Here, we perform both an experimental characterization and theoretical analysis of these effects in integrated micro-ring resonators in high index doped silica (HIDS), which has had many applications in integrated photonics and nonlinear optics. By fitting the experimental results with theory, we obtain fundamental parameters that characterize their thermo-optic performance, including the thermo-optic coefficient, the efficiency for the optically induced thermo-optic process, and the thermal conductivity. The characteristics of these parameters are compared to those of other materials commonly used for integrated photonic platforms, such as silicon, silicon nitride, and silica. These results offer a comprehensive insight into the thermo-optic properties of HIDS based devices. Understanding these properties is essential for efficiently controlling and engineering them in many practical applications.