title: Analysis of an upside-down taper lens end from a single-mode step-index fiber.
abstract: We introduce and analyze the upside-down taper lens end drawn from step-index fibers. Also, we model the refractive-index distribution and present the ABCD transformation matrix of this fiber end under paraxial approximation. The analysis can be useful for designing micro-optic image systems and laser diodes to single-mode fiber coupling optics.
authors.forename: S K
authors.initials: SK
authors.lastname: Mondal
authors.forename: S
authors.initials: S
authors.lastname: Gangopadhyay
authors.forename: S
authors.initials: S
authors.lastname: Sarkar