Total-internal-reflection fiber optic interface modules with different optical paths and assemblies using same

摘要

Fiber optic interface modules and assemblies using same are disclosed, wherein the module includes first and second lenses formed therein that utilize total-internal reflection within the module body. The first and second lenses define first and second optical paths of different lengths. The module may operably support first and second optical fibers so that they are optically coupled to surfaces of the first and second lenses. The first and second lenses are designed to provide predetermined tolerances for lateral offsets relative to first and second active photo-devices while maintaining respective first and second coupling efficiencies between the active photo-devices and the corresponding first and second optical fibers.

主权项

1. A fiber optic interface module configured to support first and second optical fibers, comprising:
a module body having front and rear ends, a top surface, a bottom surface and opposing sides along with optical pathways that are substantially transparent to light having an infrared wavelength; first and second optical fiber support features formed in the top surface; a ridge formed in the top surface and having first and second end walls defining a step and that respectively terminate the first and second optical fiber support features, and an angled wall that defines a total-internal-reflection (TIR) mirror; a recess formed in the module body in the bottom surface adjacent the front end and that defines a ceiling; and first and second lens surfaces formed on the ceiling and having respective first and second folded lens axes that are aligned with the first and second optical fiber support features and the TIR mirror, with the first and second lens surfaces and the first and second end walls respectively defining first and second lenses having different first and second folded optical paths with the first and second folded optical paths having different lengths.