Design and demonstration of ultra-high-Q silicon microring resonator based on a multi-mode ridge waveguide.

We present the design and experimental demonstration of the ultra-high-Q-factor silicon microring resonator based on a multi-mode ridge waveguide. The multi-mode ridge waveguide is designed to decrease the propagation loss and to improve the Q factor. The ultra-high Q factor of 1.

Silicon micro-ring tunable laser for coherent optical communication.

A compact external cavity tunable laser based on a silicon hybrid micro-ring resonator is demonstrated. A theoretical model is also employed for design and analysis of the wavelength tuning performance of the device. In this model, the gain section of the device is simulated by a conventional multimode rate equation model, whereas all rest passive sections are modeled by the frequency domain method.

Cost-effective coherent PON using silicon Mach-Zehnder modulator and digital carrier regeneration.

We propose a cost-effective coherent passive optical network (PON) by employing the linear silicon Mach-Zehnder modulator (MZM) with computationally-efficient digital signal processing (DSP). The proposed PON adopts the intensity modulation and coherent detection scheme with discrete multi-tone (DMT) signal to achieve both high spectral efficiency (SE) and receiver sensitivity. Meanwhile, a digital carrier regeneration (DCR) method is proposed to further reduce the optical carrier-to-signal power ratio of intensity modulated DMT signal based on silicon MZM, which will significantly increase the achievable system power budget, especially when a high-order modulation format is adopted.