Fred C. Unterleitner

TL;DR: A fiber optics coupler module has a portion defining a spherical reflective surface characterized by a selfconjugate plane having the property that a point source of light in the self-conjugATE plane is imaged in the Self-Conjugate Plane.

TL;DR: In this article, a fiber optic isolator with a concave reflector and a fiber holder defining first and second fiber ports that register the respective ends of the first and the second fibers is described.

TL;DR: In this article, the authors present a system for interfacing optical fibers with very low light loss and with provision for monitoring of the optical signal. But the system is not suitable for high capacity optical communication systems and yet may be mass produced at reasonable costs.

TL;DR: In this article, the authors describe the use of spherical reflectors and wavelength selectors for selecting the wavelengths of optical radiation on selected optical paths between a light source and a light target.

TL;DR: In this article, an attenuating centrosymmetric reflective (CSR) device is provided for controllably coupling optical energy between pairs of optical fibers and back reflections to the source are eliminated by positioning the variable density attenuator plate at an angle large enough so that reflections of all reflected rays exceed the acceptance angle of the fiber ends.