Module for optical communication

Abstract

Bi-directional and uni-directional optical communication and transmission modules minimize crosstalk during use by diffusing reflected and returned stray light. A bi-directional module includes a transmission optical element for transmitting light into the module, a reception optical element for receiving light in the module, an optical fiber for guiding light to and from the transmission and reception optical elements, respectively, a beam splitter for allotting light received from the transmission optical element and the optical fiber, and a light non-return chamber for receiving and diffusing stray light reflected by the beam splitter from the transmission optical element and the optical fiber. A uni-directional module includes a light non-return chamber for receiving and diffusing return light reflected by a beam splitter from at least one optical device arranged in the module. In other aspects of the invention, a variety of optical modules are provided wherein component parts are either aligned along a central axis of a through-hole of the module, are adjustable to maintain an optimum optical axis for light transmission through the module, or are arranged to mutually correct for the axial shift of light in any given component to minimize the total axial shift of light entering and exiting the module.