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US 4,907,853 AGranted
Optical connector using a polarization-maintaining optical fiber
AssigneeNEC Corporation
InventorToshio Hiratsuka
Life of this patent
Estimating the term…
Abstract
An optical connector is disclosed which comprises a polarization-maintaining optical fiber inserted into an oval hole in a ferrule and fixed in the hole by an adhesive. The major axis of the oval hole coincides with the direction in which stress is applied to the polarization-maintaining optical fiber and the minor axis of the hole is approximately equal to the diameter of the polarization-maintaining optical fiber.
Claims20
An optical connector using a polarization-maintaining optical fiber, comprising:
- polarization-maintaining optical fiber means for maintaining a polarization plane by applying stress in a direction perpendicular to the optical axis of the optical fiber means, said optical fiber means including a core and stress-applying means arranged symmetrically with respect to the core;
- ferrule means into which said polarization-maintaining fiber means are inserted, and whose section perpendicular to said optical axis has an oval hole, the major axis of said oval hole coinciding with the direction in which the stress is applied to said core of said polarization-maintaining optical fiber means, and the minor axis of the same being approximately equal to the diameter of said polarization-maintaining optical fiber means;
- and
- adhesive means for fixing said polarization maintaining optical fiber means in said hole.
1 more element
An optical connector comprising:
- an optical fiber which has an optical axis, a core, and stress-applying means arranged symmetrically with respect to the core for maintaining a polarization plane by applying stress to said core in a direction perpendicular to the optical axis;
- and
- a member which has a hole wherein the optical fiber is fixedly disposed in the hole, the hole has first and second dimensions perpendicular to the optical axis of the optical fiber, and the first dimension is larger than the second dimension and is coincident to the direction of stress.
An optical connector comprising:
- a fiber cord including a polarization-maintaining optical fiber which maintains the polarization plane of transmitted light and which has an optical axis, the optical fiber including a core and stress-applying means arranged symmetrically with respect to the core for maintaining a polarization plane by applying stress to said core in a direction perpendicular to the optical axis;
- a ferrule including a hole, the polarization-maintaining optical fiber being fixedly disposed in the hole and the hole having first and second dimensions perpendicular to the optical axis, the first dimension being larger than the second dimension and coincident with the applied direction of stress;
- and
- a housing assembly including a front part disposed around the ferrule and a rear part disposed around the fiber cord.
1 more element
An optical connector using a polarization-maintaining optical fiber, comprising:
- polarization-maintaining optical fiber means for guiding an incident light beam while maintaining a polarization plane of said incident light beam, said polarization-maintaining optical fiber means having a core, a clad for cladding the core, and stressed-applying means contained within the clad and arranged symmetrically with respect to the core for stressing the core in a direction perpendicular to the optical axis of the optical fiber means;
- ferrule means for housing said polarization-maintaining fiber means, said ferrule means having an oval hole parallel to a ferrule axis and being of an oval shape in a section perpendicular to said optical axis, the major axis of said oval shape coinciding with said direction of stress and the length of the minor axis of the oval hole being approximately equal to the diameter of the polarization-maintaining optical fiber means;
- and
- adhesive means, mainly placed in gaps formed by an internal wall of said ferrule means and said polarization-maintaining optical fiber means, for fixing said polarization-maintaining optical fiber means in said hole.
1 more element
Dependencies are inferred from the claim text.