Theoretical research of active ring microresonator tunable filter based on thermo-optic effect

摘要

Based on Er-Yb co-doped phosphate glass substrate, tunable single micro-ring filter using thermo-optic effect is proposed and analyzed theoretically. The analytical expressions of the transmission performance, bandwidth and finesse of the proposed ring resonator filter are derived using transfer matrix method, the calculated temperature coefficient of center wavelength is 0.011nm/°C. Numerical results demonstrate that bandwidth and finesse of the filter can be adjusted by varying the input pump power.