1State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083 2University of Chinese Academy of Sciences, Beijing 101408 3State Key Laboratory of Software Development Environment, Beihang University, Beijing 100191
Abstract：A four-channel integrated optical wavelength de-multiplexer is experimentally illustrated on a silicon-on-insulator (SOI) substrate. With the aid of cascaded micro-ring resonators, the whole performance of the wavelength de-multiplexer is improved, such as 3 dB bandwidth and channel crosstalk. Based on the transform matrix theory, a four-channel wavelength de-multiplexer with average channel spacing 4.5$\pm$0.5 nm (3 dB bandwidth $\sim 2\pm 0.5$ nm) is demonstrated at telecommunication bands. For each channel, the extinction at the adjacent channel is below $-$39 dB and the out-of-band rejection ratio is up to 40 dB. The channel dropping loss is below 5 dB in the five FSR spectral response periods (near 100 nm).
2017, Vol. 34 
