title: Laser-to-fiber optical coupling scheme with a long working distance by use of thermally overexpanded fiber.
abstract: A laser-diode-optical-fiber coupling scheme that uses aspherically ended thermally overexpanded fiber is proposed. The scheme is verified by both an analytical formalism and a wide-angle beam-propagation method analysis in cylindrical coordinates.
authors.forename: G I
authors.initials: GI
authors.lastname: Kweon
authors.forename: I S
authors.initials: IS
authors.lastname: Park
authors.forename: J I
authors.initials: JI
authors.lastname: Shim