@inproceedings { Weis_CLEO2012, title = {Integrated microring add-drop filters with contradirectional couplers }, journal = {CLEO (Conference on Lasers and Electro-Optics) 2012}, year = {2012}, month = {05/2012}, pages = {JW4A.91 }, address = {San Jose, US}, author = {Wei Shi and Xu Wang and Wen Zhang and Han Yun and Nicolas A. F. Jaeger and Lukas Chrostowski} }