@article { Shi:13, title = {Ultra-compact, flat-top demultiplexer using anti-reflection contra-directional couplers for CWDM networks on silicon}, journal = {Opt. Express}, volume = {21}, number = {6}, year = {2013}, month = {03/2013}, pages = {6733--6738}, publisher = {OSA}, type = {article}, abstract = {Wavelength-division-multiplexing (WDM) networks with wide channel grids and bandwidths are promising for low-cost, low-power optical interconnects. Wide-bandwidth, single-band (i.e., no free-spectral range) add-drop filters have been developed on silicon using anti-reflection contra-directional couplers with out-of-phase Bragg gratings. Using such filter components, we demonstrate a 4-channel, coarse-WDM demultiplexer with flat passbands of up to 13 nm and an ultra-compact size of 1.2 \&\#x000D7; 10\&\#x02212;3 mm2.}, keywords = {Gratings; Integrated optics devices; Waveguides; Wavelength filtering devices}, URL = {http://www.opticsexpress.org/abstract.cfm?URI=oe-21-6-6733}, author = {Wei Shi and Han Yun and Charlie Lin and Mark Greenberg and Xu Wang and Yun Wang and Sahba Talebi Fard and Jonas Flueckiger and Nicolas A. F. Jaeger and Lukas Chrostowski } }