Abstract
The dependence of optical microfiber knot resonators (MKRs) thermal properties on the geometry parameters is theoretically and experimentally investigated in this article. According to the simulated and experimental results, the thermal properties of MKRs are synthetically determined by the microfiber diameter, refractive index, and thermo-optic coefficients of the external medium. Also, the rules for reinforcing or suppressing the thermal effects of MKRs and MKR-based devices by selecting matched configuration parameters are presented. A good agreement between the simulated and experimental results is obtained. The conclusions derived from our work would provide helpful guidelines in designing MKR-based devices with desired thermal properties to satisfy different requirements in applications.
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