1State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083 2University of Chinese Academy of Sciences, Beijing 100049 3State Key Laboratory of Software Development Environment, Beihang University, Beijing 100191
Abstract：We demonstrate a highly compact third-order elliptical micro-ring add-drop filter based on a silicon-on-insulator wafer. The elliptical micro-ring resonator has a major radius of 6 μm (minor radius of 4.112 μm) and a large free spectral range of 18 nm. Experimental results show a box-like channel dropping response, which has a 3 dB bandwidth of $\sim$2.7 nm, high out-of-band signal rejection of around 40 dB and a very low drop loss ($ < $0.5 dB). Simulation agrees well with the experiments. The footprint of the whole chip is only 0.0003 mm$^{2}$.
2017, Vol. 34 
