Li, F All-optical XOR logic gate for 40Gb/s DPSK signals via FWM in a silicon nanowire. [electronic resource] - Optics express Oct 2011 - 20364-71 p. digital Publication Type: Journal Article; Research Support, Non-U.S. Gov't ISSN: 1094-4087 Standard No.: 10.1364/OE.19.020364 doi