Hermetically sealed optical fiber ferrule assembly supporting multiple optical fibers
View Patent ↗An hermetically sealed, optical fiber assembly is provided. The assembly includes a plurality of optical fibers and a ferrule. The ferrule has a first aperture extending through a first end of the ferrule and a plurality of second apertures extending through a second end of ferrule opposing the first end of the ferrule such that a continuous passage is formed between the first aperture and each of the second apertures. The first aperture, which has a diameter greater than a diameter of the second apertures, is sufficiently large in size to receive the plurality of optical fibers therein. Each of the optical fibers traverses the first aperture and a respective one of the second apertures. An adhesive material secures each of the optical fibers to the first aperture and to the respective one of the second apertures. A solder material bonds each of the optical fibers to an entrance to the respective one of the second apertures.
1. A hermetically sealed, optical fiber assembly, comprising:
a plurality of optical fibers;
a ferrule having a first aperture extending through a first end of the ferrule and a plurality of second apertures extending through a second end of ferrule opposing the first end of the ferrule such that a continuous passage is formed between the first aperture and each of the second apertures, said first aperture having a diameter greater than a diameter of the second apertures and being sufficiently large in size to receive the plurality of optical fibers therein, each of said optical fibers traversing the first aperture and a respective one of the second apertures;
an adhesive material securing each of the optical fibers to the first aperture and to said respective one of the second apertures; and
a solder material bonding each of said optical fibers to an entrance to said respective one of the second apertures.
2. The optical fiber assembly of claim 1 wherein said adhesive material substantially fills said first aperture.
3. A method of forming a hermetically sealed, optical fiber assembly, said method comprising the steps of:
providing a ferrule having a first aperture extending through a first
end of the ferrule and a plurality of second apertures extending through a
second end of ferrule opposing the first end of the ferrule such that a continuous passage is formed between the first aperture and each of the second apertures, said first aperture having a diameter greater than a diameter of the second apertures;
inserting a plurality of optical fibers into the ferrule such that the plurality of optical fibers traverses said first aperture and each of the optical fibers traverse a respective one of the second apertures;
applying an adhesive material between each of the optical fibers and the first aperture;
applying an adhesive material between each of the optical fibers and said respective one of the second apertures; and
applying a solder material to bond each of the optical fibers to an entrance to said respective one of the second apertures.
4. The method of claim 3 further comprising the step of substantially filling said first aperture with the adhesive material.
5. The method of claim 3 wherein the step of applying a solder material includes the step of removing a portion of a sheath surrounding each of the optical fibers and applying a metallic coating to each exposed portion of the optical fibers.