A compact Si-nanowire-based reflective arrayed-waveguide grating (AWG) for dense wavelength-division multiplexing is proposed. At the end of each waveguide in the array, there is an individual photonic crystal (PhC) reflector, which makes the AWG layout design very flexible. All the PhC reflectors are with the same design. With such a design, the total size of the AWG (de)multiplexer is reduced by more than a half. The reflection efficiency of the used PhC reflectors is enhanced by optimizing the taper between the arrayed waveguides and the PhC reflector. A 200GHz AWG (de)multiplexer is designed and fabricated as an example. The total size is only about 193μm×168μm.
© 2010 Optical Society of America
Original Manuscript: April 26, 2010
Revised Manuscript: July 26, 2010
Manuscript Accepted: August 2, 2010
Published: September 2, 2010
Yaocheng Shi, Xin Fu, and Daoxin Dai, "Design and fabrication of a 200 GHz Si-nanowire-based reflective arrayed-waveguide grating (de)multiplexer with optimized photonic crystal reflectors," Appl. Opt. 49, 4859-4865 (2010)