A large diameter optical waveguide, grating, and laser includes a waveguide having at least one core surrounded by a cladding, the core propagating light in substantially a few transverse spatial modes; and having an outer waveguide dimension of said waveguide being greater than about 0.3 mm. At least...http://www.google.ca/patents/US8111963?utm_source=gb-gplus-sharePatent US8111963 - Large diameter optical waveguide, grating and laser
