Avalanche-photodiode-integrated silicon photonics MIOC for interferometric fiber optic gyroscope

By integrating III-V avalanche photodiode atop output grating coupler of a silicon photonics MIOC, we demonstrate an improved scale factor at low-to-intermediate input light intensity (< 0 dBm) in an interferometric fiber optic gyroscope. However, such APD-integrated IFOG exhibits a slightly higher angle random walk of ~0.1 deg/rt-hr mainly due to the higher APD noise that requires further investigations.