Is the new light saber cross-guard seen in the teaser trailer for Star Wars 7 canon of any kind?

Has a cross-guard lightsaber ever been fictionalized previously in the Star Wars universe of any canon? Or is this a new saber technology completely written for the new Star Wars film?

I'm unsure how Disney works the canon now in the Star Wars universe. I did find this article on the star wars wikia, but I'm not sure how canon that article is.