The influence of self-heating on the static transmission characteristics of depletion-type Si micro-ring modulators (MRMs) is investigated. Self-heating, caused by free-carrier absorption of the input light inside the doped ring waveguide, increases the effective refractive index of the ring waveguide and results in the red-shifted resonance wavelength. This phenomenon is modeled based on the coupled-mode equation with a newly-introduced self-heating coefficient R. The accuracy of our model is confirmed by measurement. In addition, dependence of R on device size and doping concentration is experimentally investigated and the resulting dependence is explained.
|Number of pages||7|
|Journal||IEEE Journal of Selected Topics in Quantum Electronics|
|Publication status||Published - 2016 Nov 1|
Bibliographical noteFunding Information:
This work was supported by the National Research Foundation of Korea funded by the Korean government under Grant 2015R1A2A2A01007772
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All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering