Improving the linearity of silicon ring modulators by manipulating the quality factor and operation wavelength

摘要

We present that the linearity of silicon ring modulators in microwave photonics links can be improved by manipulating the quality factor in the cavity. By reducing Q factors of silicon ring modulators from 11000 to 5880 and tuning the operation wavelength for modulation, the measured Spurious-Free Dynamic Ranges of the third-order intermodulation distortion are improved from 98.5 dB·Hz~(2/3) to 104.3 dB·Hz~(2/3) and from 90.6 dB·Hz~(2/3) to 94.7 dB·Hz~(2/3) at 1 GHz and 10 GHz, respectively.