Abstract: An optical fiber is optically coupled to a light-receiving/emitting element contained in an interface box. The coupling structure is composed of a cylindrical ferule water-tightly inserted into a through-hole formed in a wall of the interface box, a resilient grommet coupled to the ferule and a coupler having the light-receiving/emitting element. An optical fiber is inserted into coaxially formed center holes of the ferule and the grommet, and an axial end of the optical fiber is exposed at an axial end of the ferule. The coupler is coupled to the ferule so that the light-receiving/emitting element directly faces the exposed end of the optical fiber to establish an optical connection at a minimized connection loss.

Abstract: A frame includes a cabinet, a door, and a bracket. The cabinet has an opened front face. The door has a door frame and an inner door section. The door frame is connected to the cabinet for the door to open and close relative to the front face of the cabinet. The bracket connects the inner door section to the door frame such that the inner door section is offset from the front face of the cabinet by a separation distance and covers the front face of the cabinet from the separation distance when the door is closed. The bracket has a sufficient length such that the separation distance between the inner door section and the front face of the cabinet when the door is closed permits fiber optic components to extend through the front face of the cabinet without being compressed by the inner door section.

Abstract: A gravel pack completion with fluid loss control and fiber optic wet connect. In a described embodiment, a system for completing a subterranean well includes multiple assemblies installed in a wellbore. Each assembly has a fiber optic line. The fiber optic lines are operatively connected to each other after the assemblies are installed in the wellbore.

Abstract: A substrate having attached filamentary members is disclosed. The substrate includes a plastic layer and the apparatus for attaching the filamentary member includes an anvil, a needle and a swaging tool movable relatively to the anvil. The method of attachment includes the steps of penetrating the substrate with the needle to create an opening, positioning the filamentary member in the opening, and compressing the substrate between the swaging tool and the anvil so as to deform the plastic layer and swage the filamentary member to the substrate. The needle is heated to melt the plastic layer so that it fuses with the filamentary member upon swaging.

Abstract: An assembly for sealingly enclosing a space into which one or more optical fibres and/or optical cables is or are fed includes a container defining the space and a sealing member. The container has an opening therein. The sealing member sealingly encloses the one or more optical fibres and/or optical cables positionable distinctly and separately from the container. The sealing member: (a) can be placed in the opening so that the one or more optical fibres and/or optical cables extend through the opening into the container, and (b) can be heat and/or pressure sealed to the container to seal the opening around the one or more optical fibres and/or optical cables.

Abstract: A fiber distribution frame includes a cabinet which houses fiber optic components. A door frame is connected to the cabinet for the door to close relative to a front face of the cabinet. The door frame surrounds an opened area which exposes the front face when the door is closed for the components to extend out from the cabinet. Brackets connect an inner door section to the door frame such that the door section is offset from the front face by a separation distance when the door is closed. The brackets have a sufficient length such that the separation distance permits the components to extend out of the cabinet and maintain a minimum bend radius without being compressed by the door section when the door is closed. A component router is connected to the cabinet and positioned within the separation distance for directing the components to outside of the cabinet.

Abstract: A fiber optic cable has a plug assembly that may be positioned and secured at any desired location along the length of the cable to engage a receptacle disposed within a connector port provided in a wall of a connection terminal. The plug assembly includes a shroud, a coupling nut, a heat shrink tube for sealing the cable and a boot for providing bending strain relief. At least a portion of the cable passes through the connector port for interconnection with optical fibers of a distribution cable or optical equipment. A method for routing a fiber optic cable into a connection terminal includes using a connector port provided in a wall of the terminal, determining a desired length of the cable, positioning and securing a plug assembly at a desired location along the length of the cable, and mating the plug assembly with a receptacle disposed within the connector port.

Abstract: A fiber optic gasket includes one or more apertures to individually retain optical fibers from one or more fiber optic cards positioned within an enclosure. A slit within the fiber optic gasket associated with each aperture facilitates placement of an optical fiber within an aperture. The fiber optic gasket includes a layer of conductive material for electromagnetic interference protection. When installed in the enclosure, the fiber optic gasket comes in contact with a door that is removably connected to the enclosure. An electro-magnetic interference shield is provided at the interface between the door and the fiber optic gasket. Optical fibers can extend out of the enclosure without causing harmful electromagnetic energy from leaving or entering the enclosure.

Abstract: A transceiver module including a primary printed circuit board and a secondary printed circuit board in an enclosure is presented. The primary printed circuit board is coupled to the secondary printed circuit board by a connector pin that protrudes out of a critical surface of the enclosure. The printed circuit boards may be positioned substantially parallel to the critical surface of the enclosure. When a transmitter is electrically connected to the primary printed circuit board and a receiver is electrically connected to the secondary printed circuit board, the transmitter and the receiver may be positioned in a plane that is also substantially parallel to the plane of the critical surface.

Abstract: The fiber optic connector includes a bulkhead connector housing, an expanded beam insert body, ferrules, ball lenses, focal length spacers, and a mating plane adapter. The expanded beam insert body is mounted to the bulkhead connector housing. The ferrules, ball lenses, and focal length spacers are mounted on the expanded beam insert body. The mating plane adapter is mountable to the bulkhead connector housing.

Abstract: A fiber tail assembly is provided that includes an outer sleeve, which can be attached and hermetically sealed to the housing of an optical device, and a sealing ferrule, which may be inserted into and hermetically sealed to the outer sleeve. An optical fiber may be inserted through an axial bore in the sealing ferrule and hermetically sealed thereto, such as with a glass seal. The hermetic seal between the sealing ferrule and the fiber avoids high or transversely asymmetric stress that may change the birefringence of the fiber. The optical fiber may be inserted through a cap ferrule or a stress relief tube, which may be attached to the fiber and to the outer sleeve, protecting the fiber tail assembly from axial stress that may damage the fiber or the hermetic seals. Methods for forming the same are provided.

Abstract: The present invention provides an optical fiber of which a zero dispersion wavelength falls within a range of between 1,250 nm and 1,350 nm inclusive, transmission loss at 1,550 nm is equal to or less than 0.185 dB/km, chromatic dispersion at 1,550 nm is within the range of 19±1 ps/nm·km, a dispersion slope at 1,550 nm is equal to or less than 0.06 ps/nm2·km, an effective area Aeff is equal to or more than 105 ?m2, a cable cutoff wavelength ?cc is equal to or less than 1,530 nm, polarization mode dispersion is equal to or less than 0.1 ps/km1/2, and a loss when the optical fiber is wound on a mandrel having an outer diameter of 20 mm is equal to or less than 10 dB/m.

Abstract: A method is provided for sealing a container into which optical fibers are fed. A portion of the optical fibers is accommodated between two strips which are sealed together by applying heat and/or pressure. The strips are then placed in an opening of the container and the container is sealed. The strips, which may be made of plastic, support the fibers while providing an excellent seal.

Abstract: An optical-fiber feedthrough formed of a metallic sleeve 1 and an optical fiber 2 fastened thereto. The the metallic sleeve 1 has i) a sleeve main body having a first hollow portion 9 which has an inner diameter larger than the outer diameter of the optical-fiber bare fiber uncovered portion 3 in the optical fiber 2 and into which the optical-fiber bare fiber uncovered portion is inserted, and a second hollow portion 8 which communicates with the first hollow portion and has an inner diameter larger than the outer diameter of the resin-covered portion 5 in the optical fiber and in which an inserted portion of the resin-covered portion and an optical-fiber bare fiber uncovered portion standing uncovered from the resin-covered portion to lead to the first hollow portion are held and ii) a first conical recessed portion 10 which is provided on the first hollow portion side of the sleeve main body and to which the leading end portion of the optical-fiber bare fiber uncovered portion is uncovered.

Abstract: There is provided wiring device for optical fiber capable of increasing the performance of connection work of an optical fiber cable without deteriorating a signal transmitting properties of the optical fiber cable.

Abstract: An optical module box made of aluminum that has a reworkable glass-sealed fiber feedthru is disclosed. A fiber is inserted through a glass seal and a C-seal for hermetically sealing an opening in the optical module box. In a first embodiment, a module box employing a single-fiber fiber feedthru is described. In a second embodiment, a module box employing a 2-fiber feedthru is described. In a third embodiment, a module box employing a ribbon fiber feedthru is described. A module box having an opening with a single-fiber feedthru, comprising a C-seal; a glass sealed feedthru having a front tube and a back tube, the back tube of the glass sealed feedthru extending through the C-seal; and a fiber passing through the glass sealed feedthru and the C-seal, thereby hermetically sealed into the opening of the module box.

Abstract: A method is provided for sealing a container into which optical fibers are fed. A portion of the optical fibers is accommodated between two strips which are sealed together by applying heat and/or pressure. The strips are then placed in an opening of the container and the container is sealed. The strips, which may be made of plastic, support the fibers while providing an excellent seal.

Abstract: A light path extending between first and second zones that are sealed relative to each other by a sealing gasket is provided. The light path includes at least one optical fiber. The optical fiber is provided with a metal coating and passes through the sealing gasket.

Abstract: A cable trough cover assembly and method of assembly including a cover plate and a hinge piece. The cover plate includes a pivot member along at least one edge, and the hinge piece defines a pocket for releasably receiving the pivot member. The pocket and pivot member arrangement allow the cover plate to be rotated relative to a cable trough to which the hinge pieces may be mounted.

Abstract: Articles and methods for positioning lensed fiber elements and optical devices are disclosed. The articles and methods include a lens gripping element and a fiber gripping element disposed on a planar substrate. The articles and methods are useful for manufacturing optical fiber and lens arrays and waveguide devices.

Abstract: Methods and apparatus for hermetically sealing an optical fiber in a feedthrough connection. In brief overview, the optical fiber is mounted in a housing whose physical properties differ from that of the fiber by utilizing a structure in accordance with the present invention. The structure, typically in transition bushing form, is formed from at least two materials, such that the physical properties of a first material are selected to match the physical properties of the optical fiber, and the physical properties of a second material are selected to match physical properties of the housing. When the matched physical properties are the coefficients of thermal expansion (CTE) of the fiber and the housing, the result is a fiber optic mounting that remains hermetically sealed despite changes in ambient temperature that would typically induce stresses in the seal, potentially causing its failure.

Abstract: An optical fiber assembly having a hermetic seal portion includes a optical fiber assembly and a metal pipe. The optical fiber assembly includes a metallized portion where a portion exposed by peeling off a resin coating of the optical fiber assembly is coated with metal. The metal pipe includes a feedthrough hole, an uncovered portion, a brazed portion and an adhesive-fixed portion. The feedthrough hole has a length necessary to cover a part of the metallized portion and a part of the coated portion leading to one end of the metallized portion. The uncovered portion has a housing groove leading to the feedthrough hole and contains a remainder of the metallized portion and a part of the coated portion leading to the other end of the metallized portion. The brazed portion hermetically seals the optical fiber assembly to the metal pipe by brazing the metallized portion and the inner surface of the feedthrough hole near a slanted upward opening of the feedthrough hole on the housing groove side.

Abstract: A fiber optic feed-through tube, a method for making it and a method for hermetically sealing and aligning lightwave waveguides inserted into the tube. The feed-through tube is preferably a metal tube with low melting point hermetic sealing material deposited on one end and the lightwave waveguide is an optical glass fiber. The fiber is fed through a tube having low melting point hermetic sealing material on one end.

Abstract: In the production of a hollow cast article having a slit, the release of a hollow cast product from a mold is carried out while opening the hollow cast product. In one embodiment, a core provided with recessed parts (or projected parts) formed in a slit forming part (or an outer peripheral part) is used and the drawing out of the core from the hollow cast product is carried out while opening the hollow cast product by means of the recessed parts (or projected parts) mentioned above. By such a method, a hollow cast article having a slit and projected parts (or recessed parts) formed in a slit part or/and an inner peripheral part thereof is obtained.

Abstract: There is provided a packaging unit for an optical fiber array using a planar lightwave circuit (PLC). An optical fiber array is fixed within a housing. The housing has first and second slots formed to face each other on the side periphery, and each of the first and second slots has opened ends to make the inner and outer walls of the housing communicate with each other. An optical fiber of the optical fiber array is inserted through first and second boots and then the first and second boots are inserted in the first and second slots of the housing.

Abstract: A lasing system for forming a sealed barrier between a process environment and an environment external to the process environment. The lasing system includes a wall enclosing the process environment. The lasing system also includes a laser connector coupled to the wall and a line. It should also be added that in one exemplary embodiment, the laser connector is configured to be releasably coupled to the wall and the line. The line, such as for example a fiber optic line, provides the lasing system with laser energy from a high-powered laser. In one exemplary embodiment, the energy from the laser is between 100 to about 1000 watts. Operatively, the wall and the laser connector form an environmental barrier between the process environment and the outside environment.

Abstract: A gas blocking device is used in an optical fiber repeater or other device to prevent the passage of gas, for example, to prevent nitrogen from escaping from a pressurized housing through a fiber holding tube or pigtail. The gas blocking device includes a fiber containing body, a fiber organizing insert, and a locking member securing the insert to one end of the body. The fiber containing body is attached to one end of the fiber holding tube. The fibers extend from the fiber holding tube through a passageway in the body, and each of the fibers extends through a fiber receiving hole in the fiber organizing insert. The insert engages the body such that the insert is prevented from rotating with respect to the body and the fibers are protected against microbending and other damage. A material, such as hot melt glue, fills at least a portion of the body and surrounds the fibers to block the gas from entering the fiber holding tube.

Abstract: An optical fiber cutting apparatus comprises a coated section holder, an uncoated section holder, and a cutter. A ferromagnetic substance or a magnet is disposed on a surface of the uncoated section holder and a surface of the cutter holder which are facing each other. A ferromagnetic substance or a plurality of magnet having different magnetic force are disposed with equal interval on the uncoated section holder or the cutter holder. Tension is applied to the optical fiber by repulsing-force which exists among a magnet, a first magnet, and the second magnet. Tension which is applied to the optical fiber increases gradually. By doing this, an optical fiber cutting apparatus is provided which does not decrease strength of the optical fiber.

Abstract: The present invention provides a hermetically sealed module to be located in an external pressure vessel providing protection from external pressure in an undersea environment. The hermetically sealed module includes at least one optical amplifier and an hermetically sealed housing for containing the optical amplifier. The housing has a retaining element for retaining the housing within the external pressure vessel. The module also includes a plurality of ports for conveying into the housing, in an hermetically sealed manner, at least one optical fiber and a conductor incorporated in an undersea optical fiber cable. The conductor supplies electrical power to the optical amplifier. At least one conductive terminal is located in the housing for establishing electrical contact with the conductor traversing each of the plurality of ports. The conductive terminal supplies electrical power from the conductor to the optical amplifier.

Abstract: To hermetically seal a fiber optic light guide (1) in a stripped or de-coated state, I.e. the bare optical fiber (2), in a feedthrough sleeve (5) the bare optical fiber (2) is sealed together with the feedthrough sleeve (5) by composite-glass solder with local heating. To make a permanent hermetic glass seal, the feedthrough sleeve (5) is made from an Invar alloy with very low thermal expansion and the composite-glass solder is low-melting with thermal expansion properties adapted to the alloy. The composite-glass solder is molded into prefabricated half-cylinder-shaped pressed parts (7) in a press/sinter technology process, The stripped optical fiber (2) is inserted between the pressed parts (7) arranged in the feedthrough sleeve (5) and sealed by melting the pressed parts together with each other and with the stripped optical fiber and feedthrough sleeve.

Abstract: An illumination module comprises a ring-shaped mounting member having an axially extending viewing passage and an L-shaped radiation guide including a radiation entry end for communication with an external radiation source and a radiation exit end provided with a fused glass window for insertion within a process vessel or pipeline. The radiation guide extends through a radial guide hole in the mounting member and bends to run axially along the passage of the mounting member in close proximity to the wall of the passage so as to minimize blockage of available viewing area through the passage. The illumination module can be clamped between a sight glass or camera viewing unit and the flange of a nozzle port, or between segments of a pipeline near a viewing window of the pipeline, to form an illumination and viewing assembly.

Abstract: A method is provided for sealing a container into which optical fibres (10) are fed. A portion of the optical fibres (10) is accommodated between two strips (3, 4) which are sealed together by applying beat and/or pressure. The strips are then placed in an opening of the container and the container is sealed. The strips (3, 4), which may be made of plastic, support the fibres (10) while providing an excellent seal.

Abstract: Optoelectronic housings and methods of assembling optoelectronic packages are disclosed. An example of such an optoelectronic package includes an optoelectronic module having a substrate, a first optical fiber extending in a first direction from the substrate, and a second optical fiber extending from the substrate in a second direction opposite the first direction. It also includes a body defining a chamber dimensioned to receive the optoelectronic module, and an optical fiber feedthrough fixed to a first side of the body for receiving the first optical fiber. A bore is defined in a second side of the body opposite the first side of the body. The bore is positioned to receive the second optical fiber. A second optical fiber feedthrough is threaded onto the second optical fiber and slid into the bore after the second optical fiber is positioned in the bore. The second feedthrough is then secured to the body.

Abstract: Methods and apparatus for hermetically sealing an optical fiber in a feedthrough connection. In brief overview, the optical fiber is mounted in a housing whose physical properties differ from that of the fiber by utilizing a structure in accord with the present invention. The structure, typically in transition bushing form, is formed from at least two materials, such that the physical properties of a first material are selected to match the physical properties of the optical fiber, and the physical properties of a second material are selected to match physical properties of the housing. When the matched physical properties are the coefficients of thermal expansion (CTE) of the fiber and the housing, the result is a fiber optic mounting that remains hermetically sealed despite changes in ambient temperature that would typically induce stresses in the seal, potentially causing its failure.

Abstract: A technique for hermetically sealing an optical component in a metal package is described. Variations of the technique are described in which optical communication between the optical component and the outside environment is achieved with a ribbon fibre.

Abstract: A coupling device to secure a communication cable to a cable box and method to attach are disclosed. The coupling device comprises a coupling nut permanently affixed to one end of a communication cable and a coupling ring, which, on one side is designed to be threadably connected to the coupling nut and on the other side to be threadably connected to a cable box.

Abstract: An improved pressure vessel comprises a tubular casing having an internal cavity and a first and second opening at each end. The internal cavity is divided into a first and second cylindrical plug region extending inward from the first and second opening and a hollow interior region. An optical component in the hollow interior has at least a plurality of optical fiber pigtails extending therefrom. A first and second cylindrical plug is force fit into the plug regions. At least one plug has a through-hole for receiving optical fiber pigtails. At least one plug has a ceramic adhesive plug formed by inserting adhesive into the through-hole and preferably filing the void space therein. The adhesive encapsulates the optical fibers passing through the through-hole. The plug has a channel machined into its outer circumference to receive an O-ring. A cap covers over and beyond the outer surface of the plug.

Abstract: An optical fiber fitting includes a cylindrical sleeve having a first annular groove extending normal to the axial direction on the inner surface of the cylindrical sleeve, a rod member having a plurality of channels each extending in the axial direction and receiving therein an optical fiber and a second annular groove extending normal to the axial direction, and a C-shape spring, having a radially outer surface received in the first annular groove and a radially inner surface received in the second annular groove, for locking the rod member with the cylindrical sleeve.

Abstract: A cable closure is provided which adapted to accommodate different size cables and different splices. The closure includes end plates designed to receive various size cables without requiring modification during field use. The end plates are interchangeable with stainless steel and injection molded closure shells. A sealant is provided which allows multiple re-entries into closure shell. Bolts are assembled on the exterior of the closure shell to eliminate potential misalignments between the bolts and closure shell holes. Washers are used within the end plates to seal holes not used for storing cables. A cutter is provided which cuts the washers in one 360° rotation thus eliminating weak points in the washer due to multiple cuts. Alternately a plug is provided for the end plate holes which are adaptable to several size holes to reduce the number of plugs required.

Abstract: Optoelectronic packages with one or more feed-throughs having a cutout allow optical fibers that have been coupled to a component (e.g., an optical component, an electrical component, a structural component) to be fed through more easily than a package having feed-throughs without a cutout. In one embodiment, the cut in the feed-through is on the opposite side of the initial direction of the threading. That is, if the fiber is to come from above the feed-through, the cut is placed on the bottom of the feed-through. The placement of the cut on the feed-through allows a fiber previously attached to a component to be fed through without excessive curvature of the fiber.

Abstract: A hermetically sealed ferrule includes one or more walls cooperating to enclose a volume. At least one of the walls defines an orifice permitting passage to the enclosed volume. A fiber optic ribbon passes through the orifice to the enclosed volume. The fiber optic ribbon includes a plurality of optical fibers with a protective coating surrounding each of the optical fibers. Each optical fiber is exposed where it passes through the orifice. A low-temperature melting point glass seals a space between the exposed optical fibers and the region of the wall defining the orifice. A first epoxy layer extends between the fiber optic ribbon, an outer surface of the region of the wall defining the orifice, and the low-temperature melting point glass. A second epoxy layer extends between the fiber optic ribbon, an inner surface of the region of the wall defining the orifice, and the low-temperature melting point glass.

Abstract: An optical fiber assembly having a hermetic seal portion includes a optical fiber assembly and a metal pipe. The optical fiber assembly includes a metallized portion where a portion exposed by peeling off a resin coating of the optical fiber assembly is coated with metal. The metal pipe includes a feedthrough hole, an uncovered portion, a brazed portion and an adhesive-fixed portion. The feedthrough hole has a length necessary to cover a part of the metallized portion and a part of the coated portion leading to one end of the metallized portion. The uncovered portion has a housing groove leading to the feedthrough hole and contains a remainder of the metallized portion and a part of the coated portion leading to the other end of the metallized portion. The brazed portion hermetically seals the optical fiber assembly to the metal pipe by brazing the metallized portion and the inner surface of the feedthrough hole near a slanted upward opening of the feedthrough hole on the housing groove side.

Abstract: A technique for hermetically sealing an optical component in a metal package is described. Variations of the technique are described in which optical communication between the optical component and the outside environment is achieved with a ribbon fibre.

Abstract: Various embodiments of methods and systems for reducing the amount of contamination that enters the optical path of an optical device are disclosed. In one embodiment, an optical device includes a housing containing at least one optical component (active, passive, or both) that is configured to process an optical signal. The optical device also includes a first sleeve that encloses a portion of an optical fiber, an optical path configured to convey the optical signal between the optical component(s) and the end of the optical fiber. A flexible seal contacts a portion of the surface of the first sleeve and contacts the surface of a portion of the housing through which the first sleeve passes.

Abstract: Optical packaging assemblies and methods of making the same are described. In one aspect, an optical packaging assembly includes a package housing, a hermetically sealed optical device housing, and an optical fiber alignment assembly. The package housing includes an optical fiber feedthrough and a package electric feedthrough. One or more optical fibers extend through the optical fiber feedthrough. The hermetically sealed optical device housing is mounted within the package housing and includes an optical window and a device electric feedthrough that is electrically connected to the electric feedthrough of the package housing. At least one optical device is mounted within the hermetically sealed optical device housing in optical alignment with respect to the optical window.

Abstract: The invention relates to a protection for glass fibers for telecommunication with air-space paper-insulated core (H1 to Hn) in distribution fields arranged in the form of cassettes. Several air-space paper-insulated cores (H1 to Hn) are assembled according to their length in a composite element (VE1 to VE5), wherein the ends can be cut to the required length if necessary. The air-space paper-insulated acres (H1 to Hn) are assembled according to their length in a discontinued manner using connecting shaped parts or in a continuous manner along the generatrix of the air-space paper-insulated cores.

Abstract: The invention provides a hermetic fiber-optic seal, such as in an optical fiber ferrule or feedthrough, having an optical fiber, a glass solder for encasing at least a portion of the optical fiber, a first glass sleeve for encasing at least a first portion of the glass solder, a second glass sleeve for encasing at least a second portion of the glass solder, and an outer sleeve for encasing at least a portion of the first glass sleeve and the second glass sleeve. A gap filled with glass solder may be provided between the first glass sleeve and the second glass sleeve. The hermetic fiber-optic seal is made by an extrusion process.

Abstract: A lasing system for forming a sealed barrier between a process environment and an environment external to the process environment. The lasing system includes a wall enclosing the process environment. The lasing system also includes a laser connector coupled to the wall and a line. It should also be added that in one exemplary embodiment, the laser connector is configured to be releasably coupled to the wall and the line. The line, such as for example a fiber optic line, provides the lasing system with laser energy from a high-powered laser. In one exemplary embodiment, the energy from the laser is between 100 to about 1000 watts. Operatively, the wall and the laser connector form an environmental barrier between the process environment and the outside environment.

Abstract: An assembly used to adapt a BNC type connector of a microsurgical optic fiber instrument to a threaded SMA type bushing of a light source includes an adapter that can be threaded on the bushing of the light source and is also connectable to the BNC connector.

Abstract: The invention provides an optical package assembly that is sealed hermitically with one or more feed-throughs with a mating ferrule. The ferrule has a head and a body, where the head in constructed in a cone shape and the body is constructed in a cylindrical shape. The ferrule is compressed at the head to hermitically sealed the fiber to the optical package and is compressed at the body to hold the fiber in place. It is apparent to one of ordinary skill in the art that the expression of compressing the ferrule can also be described as mechanically deformed the ferrule, or by other similar or equivalent terms.