Beam splitter
AssigneeG & H Technology, Inc.
InventorRobert J. Fan
Life of this patent
Estimating the term…
Abstract
A support structure for the beam splitter consists of three parts unitarily arranged. A central part has a relatively large V-groove extending along a surface between opposite edges and two identical end parts each have a pair of parallel smaller V-grooves arranged on a flat surface. Two lenses joined at a common face by a semi-reflective film of known transmission characteristics are located in the housing central part groove. Bare optical fibers are located in each of the end part grooves with the faced-off end of each fiber in non-pressurizing contact with the lens system circular end face after which the entire assembly is encapsulated.
Claims6
An optical signal beam splitter receiving an optical signal from a first fiber waveguide and passing signals to second and third fiber waveguides of predetermined character comprising:
- a support base having a generally V-shaped in cross-section centrally located first groove in a surface thereof, second and third grooves in said surface communicating with said first groove and of smaller cross-section, and a fourth groove in said surface communication with said first groove and of smaller cross-section than said first groove;
- first and second cylindrical lenses located in said first groove with their cylindrical axes colinear and parallel to the internal edge of said first groove;
- a semi-reflecting film located between said first and second lenses;
- said first, second and third fiber waveguides being received respectively within the second, third and fourth grooves with an outer end of each fiber waveguide being located slightly spaced from a surface of said first and second lenses;
- a separate quantity of index matching liquid contacting the end of each fiber waveguide and a lens surface immediately opposite thereto;
- and
- an encapsulant unitarily relating the lenses, fiber waveguides and support base.
Dependencies are inferred from the claim text.