Patent ID: 6690857
Filing Date: 2004-02-10
Classification: G02B

Abstract:
A device, comprising:a substrate having first and second opposing substrate surfaces; a first elongated groove formed over said first substrate surface, and first and second openings respectively formed at two ends of said first elongated groove, each opening penetrating through said substrate to extend between said first and second substrate surfaces; an optical fiber engaged to said substrate by passing through said first and second openings and having at least first, second, and third contiguous fiber portions, wherein said second fiber portion is disposed in said first elongated groove on said first substrate surface, and said first and said third fiber portions located on or over said second substrate surface; a second elongated groove formed on said second substrate surface and positioned to have one end overlapping with one of said first and said second openings to receive said third fiber portion, said second elongated groove having another opening at another end of said second elongated groove to pass a fourth fiber portion adjacent to said third fiber portion through said substrate to be on or over said first substrate surface; and a third elongated groove formed on said first substrate surface and positioned to have one end overlap said another opening of said second elongated groove to receive said fourth fiber portion, wherein said second fiber portion has a section where fiber cladding is partially removed to form a first optical coupling surface which evanescently couples optical energy into or out of a core of said optical fiber.