%0 Conference Paper %B CLEO (Conference on Lasers and Electro-Optics) 2012 %D 2012 %T Integrated microring add-drop filters with contradirectional couplers %A Shi, Wei %A Wang, Xu %A Zhang, Wen %A Yun, Han %A Jaeger, Nicolas %A Chrostowski, Lukas %C San Jose, US %P JW4A.91 %8 05/2012