Backscattering Effects on High-Speed Modulation of Strongly Injection-Locked Whistle-Geometry Semiconductor Ring Lasers

An injection-locking scheme, involving a single-frequency master laser monolithically integrated with unidirectional whistle-geometry semiconductor microring laser, has been proposed for enhanced ultra-high-speed performance. Greatly high-speed modulation performance of the strong-injection-locking scheme predicted in numerical calculations. In our previous analysis, however, linear coupling between two counter-propagating modes due to light backscattering was not taken into account. this work, we investigate potential negative impact on strongly injection-locked lasers.