Patent ID: 7428360
Filing Date: 2008-09-23
Classification: G01N,G02B

Abstract:
1. An optical waveguide comprising: (i) a hollow core portion that defines a light transmission path through said waveguide; (ii) a cladding at least partially surrounding a hollow core portion, such that said core portion extends along or parallel to a longitudinal, center axis of said cladding, and (iii) at least one elongated side opening in said cladding that extends parallel to said longitudinal center axis and exposes said hollow core portion to the ambient environment, wherein the hollow core portion and elongated opening jointly support at least one bound optical mode, such that said hollow core portion, said elongated opening, and said cladding form an optical ridge waveguide; and (iv) a coating situated on a surface of at least a portion of said ridge waveguide.