Abstract: The invention provides a hermetic waveguide seal, such as in an optical fiber ribbon feedthrough, or in an optical fiber ferrule or feedthrough, having an optical waveguide, a glass solder for encasing at least a portion of the optical waveguide, 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 to form a compressive seal. The hermetic waveguide seal is made by an extrusion process.

Abstract: The invention relates to an optical feedthrough including an optical fiber (11) and a protective tube (10) surrounding said fiber. In the invention, a seal (6) extends inside the annular space between the protective tube and the optical fiber, the length of said seal being greater than 50 mm.

Abstract: A fiber converter box includes a box body covered with a top cover board, the box body having 8 slots in a vertical front panel thereof and a power switch and an alternating current socket and a fan installed in a vertical back panel thereof, a plurality of circuit board assemblies installed in the box body and respectively aimed at the slots and adapted to connect a respective unshielded twisted pair cable from the network interface card of an external personal computer to an external server through a switch-hub and a router, the top cover board having a downwardly extended back plate, which has two holes respectively coupled to the power switch and alternating current socket of the box body.

Abstract: An optical fiber device (1) includes an upper cover (18), a lower cover (19), and two optical fiber holders (2). Each optical fiber holder includes a retaining body (10), a strain relief boot (20), and an interconnection member (30). A passage is defined in each optical fiber holder, for receiving a plurality of optical fibers therethrough. An inner rib (311) is formed on an inner surface of the interconnection member, and is engagingly received in a groove (112) defined in a front portion of the retaining body. Two parallel outer ribs (321) are formed on an outer surface of the interconnection member, and are engagingly received in corresponding grooves (162) defined in the upper and lower covers. An engaging bead (211) is formed at a front end of the strain relief boot, and is engagingly received in a rear groove (123) defined in an intermediate portion of the retaining body.

Abstract: A protective system for optical components, including a container, at least one optical component fixed inside said container, a length of optical fiber which has a plastic coating and is connected to said at least one optical component, and, an optical feedthrough for said length of fiber, placed in a feedthrough hole in a wall of said container and hermetically fixed therein, said optical feed through comprising an elongated body which has a longitudinal feedthrough hole into which said optical fiber can be placed, and, a portion of said length of fiber being stripped of said coating, wherein said portion of fiber which is stripped of the coating is soldered to one end of said elongated body by means of a metallic solder, such soldering in a surface portion around said portion of fiber being coated with a layer of a polymeric sealant. The polymeric sealant can be an epoxy resin, an acrylic resin, or a silicon resin.

Abstract: An end seal assembly is mounted in a conduit or feedthrough body with a through bore of stepped diameter between its ends into which a fiber or wire-carrying metal cable extends. An inner end of the cable is stopped against a shoulder in the through bore, with at least one fiber or wire extending from the cable end out through the second end of the seal body. An end seal is seated at the outlet end of the seal body and has a through bore through which the or each fiber extends. The through bore is filled with epoxy material. The end seal is of a material having a coefficient of thermal expansion approximately equal to that of the epoxy material.

Abstract: To hermetically seal a fiber optic light guide (1) in a stripped or de-coated state, i.e. the actual optical fiber (2), in a feedthrough sleeve (5) the actual optical fiber (2) is sealed together with the feedthrough sleeve (5) by means of glass solder with local heating. In order to make a permanent hermetic glass seal, the feedthrough sleeve (5) is made from an Invar alloy, i.e. an alloy with very low thermal expansion during heating and the glass solder employed is a low-melting glass solder with thermal expansion properties adapted to the metallic material. The glass solder is molded into prefabricated half-cylinder-shaped pressed parts (7), in which the stripped optical fiber (2) is inserted and sealed.

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: The permeation of the moisture into a case made of metal is roughly perfectly suppressed, and the optical communications of high quality are made possible by the operation of component(s) accommodated in the case. A plurality of through holes through which the outside of the case and a component accommodating portion communicate with each other are provided in the metallic case including a body having the component accommodating portion, and a lid. Fixed components in which an optical fiber ribbon and an optical fiber(s) are respectively sandwiched between associated metallic substrates and associated optical fiber fixing plates to be fixed by solder are fitted into the respective through holes to be hermetically sealed and fixed to the metallic case.

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: 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 device capable of receiving an optical fiber through an orifice in the housing of the device. The housing having a gold surface over a substrate material. An indium layer is located on the gold surface. A solder joint is formed with the indium layer covering the gold surface to have indium silver solder surrounding the fiber and maintaining the fiber in a desired position with the housing. The indium layer can be formed of pure indium and the solder joint is formed of indium silver solder having about 97% indium and about 3% silver. The fiber or fibers may be metallized with a pure indium coating. The indium silver solder joint can provide an improved hermetic seal at fiber entrances and exits of the device.

Abstract: A pressure vessel joint for repeaters in submarine optical communication systems is described. The joint employs a breech ring which secures an endcap to the pressure vessel. The breech ring and pressure vessel have corresponding keys. The breech ring slides over the endcap and is rotated such that the breech ring keys engage the mating keys formed in the pressure vessel. The endcap is seated on a preloaded C-ring which seals the secured structure. Additional, redundant piston seals can also be provided to further prevent leakage.

Abstract: A junction box for a single-tube cable, and particularly an optical fiber cable for the connection of one or several wires or fibers of the cable to one or several wires or fibers of another cable. The box has a hollow support (3) suitable for a tensioned connected cable crossing (C) and a spacer (2) to hold the casing of the axially cut cable spread inside the hollow support (3) to free the cable wires or fibers (F). Application to the installation and maintenance of cable networks is also described.

Abstract: In an optical waveguide bulkhead feedthrough assembly, and method of making such an assembly, a housing includes at least one sealing surface and has a tubular member disposed therein that defines an axially elongated, annular surface, and the annular surface forms an axially elongated optical feedthrough cavity. An optical fiber or like waveguide is received through the axially-elongated optical feedthrough cavity, and is spaced radially inwardly relative to the annular surface to thereby define an axially-elongated annular cavity between the fiber and annular surface. An epoxy adhesive is introduced in its liquid phase into one end of the annular cavity, and is allowed to fill the annular cavity by capillary action. Upon filling the annular cavity, the epoxy hardens and cures and, in turn, adhesively secures the optical fiber within the tubular member.

Abstract: An optical waveguide feedthrough comprising

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: A composite electrical insulator comprises a support rod generally of a composite material, two metal end-fittings each forming a socket in which a corresponding end of the support rod is inserted, at least one optical fiber placed on the outer periphery of the support rod, and an insulating outer coating surrounding the support rod and covering the optical fiber which has at least one end guided to the outside of the insulator through an end-fitting via a groove formed in the inside surface of the socket of the end-fitting, said groove opening to the outer periphery of the support rod, and via a duct extending said groove and opening to the outside of the end-fitting.

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: The present invention relates to bulkhead adapters for optically connecting two strands of optical fibers and including a length of optical fiber within the adapter for attenuating signals passing from one fiber to the other. The attenuation optical fiber is held within an attenuation hub inside the housing of the adapter. Attenuation of optical fiber signals transmitted through the adapter may be provided by the optical fiber, by an offset fusion of two optical fibers, by an airgap between two optical fiber segments, by the inclusion of a filter between two optical fiber segments, or by other structures. When an optical fiber with a connector is inserted into the adapter, the optical fiber is placed in optical contact with the attenuation optical fiber of the attenuation hub. The adapter can be inserted through an opening in a bulkhead so that optical fiber from one side of the bulkhead can be attached to optical fiber on the second side of the bulkhead.

Abstract: A watertight inlet device for inserting a cable containing optical fibers into a chamber or a container, e.g. into a splice box. The device includes a metal solepiece for securing the strength members of the optical cable, and which plugs into and fixes to a tubular sealing body equipped with an external O-ring gasket and having its rear portion shaped to form a sealing stuffing box on the outer sheath of the cable. The rear of the nut of the stuffing box receives a clamp for retaining the cable. Once the device has been fitted, the resulting assembly is inserted into the inlet passageway until it abuts against a shoulder in the passageway. Then only the head of the securing solepiece and a groove in the body project inside the container, the groove then receiving a key or fork for retaining the assembly.

Abstract: In a moving mechanism, a contact is disposed on a moving body, and the contact is in contact with a positioning member so as to move the moving body by 180 degrees. With this structure, the accurate regulation of the position of the moving body can be realized with only a slight improvement in the conventional moving mechanism, and the object can be inexpensively realized. Also, since the position detecting means, the signal processing means, etc., are not required other than the moving mechanism, necessary and sufficient functions can be realized with the minimum structure without requiring excessive energy and space.

Abstract: A composite (40) for use in the aircraft construction industry comprise an optical transmission means (42), such as an optical fiber, embedded within a carrier. The optical transmission means is provided with a high-quality optical interface surface (50) which provides a means for optical connection to the optical transmission means (42) from outside the carrier. The optical interface surface (50) is provided as part of a micro-optical component (44) which processes the optical signals to improve light extraction from and supply to the optical transmission means (40). The buried optical transmission means is acessed by a passageway (56,66) formed in the carrier to the interface surface (50). If the passageway (56,66) is formed prior to completion of finishing processes on the composite, a protective plug (48) is provided to close the passageway (56,66) until the optical connection is required.

Abstract: A method and apparatus for sealing an optical fiber in the wall of a modulator housing utilizes a metal crimp to compress sealingly a elastomer sleeve against the optical fiber.

Abstract: A fiber-locating structure for aligning an optical fiber includes opposed first and second faces. A first wall, defining a funnel, extends from the first face toward the second face; while a second wall, defining a tunnel, extends from the second face toward the first face. The first and second walls are disposed such that the funnel and the tunnel meet to form a continuous passageway between the first face and the second face.

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: In an optical waveguide feedthrough assembly, and method of making such an assembly, a tubular member defines an axially elongated, annular surface, and the annular surface forms an axially elongated optical feedthrough cavity. An optical fiber or like waveguide is received through the axially-elongated optical feedthrough cavity, and is spaced radially inwardly relative to the annular surface to thereby define an axially-elongated annular cavity between the fiber and annular surface. An epoxy adhesive is introduced in its liquid phase into one end of the annular cavity, and is allowed to fill the annular cavity by capillary action. Upon filling the annular cavity, the epoxy hardens and cures and, in turn, adhesively secures the optical fiber within the tubular member.

Abstract: A sealed fiber-optic bundle feedthrough by which a multitude of fiber-optic elements may be passed through an opening or port in a wall or structure separating two environments at different pressures or temperatures while maintaining the desired pressure or temperature in each environment. The feedthrough comprises a rigid sleeve of suitable material, a bundle of individual optical fibers, and a resin-based sealing material that bonds the individual optical fibers to each other and to the rigid sleeve.

Abstract: A connector for mounting to and through a wall of a device. In one form of the invention a connector is used for mounting to and through a wall of a device. The connector includes a body, an optical fiber, and a sealant. The body includes a surface having an aperture. The optical fiber has a length and a first end and a second end. A portion of the length of the optical fiber being metallized. The optical fiber passes through the aperture of the surface of the body and the metallized portion of the optical fiber is attached to the aperture of the surface of the body so as to form a hermetic seal between the optical fiber and the aperture of the surface of the body. The sealant is located between the body and the surface of the device so as to provide a hermetic seal between the body and the wall of the device when the body is urged toward the wall of the device thus deforming the sealant. The connector allows an optical signal to be transmitted within the optical fiber through the body.

Abstract: A wall connector for fibre optic cable includes a housing be accommodated in a wall opening. A first receptacle for a multi-fiber optic cable is disposed in the housing. A plurality of second receptacles for fibre optic cables are also disposed in the housing. Each of the second receptacles has a fiber optic cable connection to the first receptacle and is accessible via a forward face of the housing to receive a fibre optic cable connector.

Abstract: A hermetically sealed package for an electro-optical device has a two-part casing with a fiber feedthrough. The feedthrough defines a gap and is assembled using fastening means, typically bolts or screws, that are placed such that the walls of the feedthrough are prestressed before a molten solder is injected into the feedthrough to seal the casing. The material of the bolts has a greater coefficient of thermal expansion (CTE) than the CTE of the casing, whereby the mismatching between the CTE of the casing and the solder is at least partly compensated.

Abstract: A method for securing a glass fiber to a housing includes positioning the glass fiber in proximity to the wall of a housing and applying a quantity of solder glass frit to the surface of the glass fiber. Sufficient solder glass frit is employed so as to occupy the gap between the glass fiber and the housing. The solder glass frit has a melting point lower than that of the glass fiber. The surface of the glass fiber is not metallized. Upon heating the solder glass frit softens and adheres to both the glass fiber and the wall of the housing. The fused solder glass frit secures the glass fiber to the housing and forms an hermetic seal therebetween.

Abstract: Sealed cable connections can be used to connect first and second cables to a sealed cable joint. The sealed cable connection at one end of the sealed cable joint includes a cable socket body positioned within an inner region of a housing. The cable socket body includes a passageway receiving one of the cables. A seal securing member is positioned within the inner region of the housing and secured into contact with the cable socket body. At least one seal, such as a resilient metal seal, is compressed between the cable socket body and the seal securing member to seal against the inner surface of the housing. The sealed cable connection can also include a cable seal positioned around the cable and within the passageway of the cable socket body.

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 method of securing and sealing an optical fiber within a bulkhead, the method includes forming a layer of a solder-compatible material over a diffusion barrier covering a metal-clad optical fiber; extending the optical fiber through a metallic housing, with a portion of the layer of solder-compatible material within the housing, the housing and the solder-compatible material defining a gap therebetween; and bridging the gap with a solder to secure the fiber to the housing and to form a pressure-tight seal between the fiber and the housing. In one embodiment, an optical feedthrough includes a metallic housing; a gold-plated optical fiber disposed in the housing, the fiber having a nickel layer disposed thereon and a gold layer disposed over the nickel layer; and a silver-containing solder disposed in the housing and connecting the fiber to the housing, the solder bridging a gap between the metallic housing and the solder-compatible material to form a pressure-resistant seal about the fiber.

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: A pressure vessel capable of withstanding elevated hydrostatic pressures, and elevated temperature comprises a tubular cylindrical casing capable of withstanding extreme hydrostatic pressures having an internal cavity and a first and second opening at each end permitting access to said internal cavity. 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.

Abstract: The present invention is a penetrator for passing blown optical fiber through a pressure-proof boundary. The penetrator comprises a cylinder for attachment substantially in line with an opening in the boundary. The cylinder has a proximal and a distal end cap, a cylinder wall, and a central passage or dip tube for optical fibers. The central passage has substantially the same cross-sectional area as the opening in the boundary. The dip tube is sealed to each end cap and has distal and proximal tee fittings for injecting sealing materials into the dip tube. The tee fittings are joined by a length of optical fiber duct therebetween. The invention permits the optical fiber duct circuit to be easily changed.

Abstract: A protective system for optical components, having a container, at least one optical component fixed inside said container and a length of optical fiber (F) which has a plastic coating, connected to said optical component. An optical feedthrough for said section of fiber is placed in a feedthrough hole in a wall of said container and hermetically fixed therein. The optical feedthrough has an elongate body which has a longitudinal feedthrough hole into which said optical fiber (F) can be placed and a portion of said length of fiber (F) being stripped of said coating. The said portion of fiber (F) which is stripped of coating is soldered to one end of said elongate body by means of a metallic solder, and this soldering, in the surface portion around said portion of fiber (F), is coated with a layer of a polymeric sealant.

Abstract: An improved bushing for securing the position of the protective jacket of a jacketed optical fiber with respect to an optical component is provided. The improved bushing includes an elastomeric structure having a first end, a second end, and a jacketed fiber receiving surface. First and second flanges for engaging corresponding cavities within the optical component are attached to opposite sides of the elastomeric structure. The elastomeric structure further defines a cylindrical internal pathway for receiving a jacketed optical fiber, which includes the protective jacket(s) to be secured. The internal pathway runs approximately along the longitudinal centerline of the elastomeric structure from the first end to the second end and has a diameter approximately equal to the diameter of the jacketed optical fiber. The elastomeric structure also defines a channel from the internal pathway to the jacketed fiber receiving surface and which extends along the entire length of the internal pathway.

Abstract: A hermetically sealed fiber optic connector or feed through, the connector for connecting at least two fiber optic cables and including a center member having two extensions, with each of the extensions being cylindrical and coaxial. Each of the extensions includes a first engagement means and a first sealing means, with the center member defining a channel axially disposed relative to the extensions. A first connector includes a backshell, with the backshell including a second engagement means in complementary relationship with the first engagement means of a first one of the extensions, and a second sealing means in complimentary relationship with the first sealing means of the first one of the extensions. The first connector includes a ferrule seat and a ferrule joined to the ferrule seat, and includes a cylindrical crimp socket joined to the ferrule seat. The crimp socket defines an axial channel for receiving a first fiber optic cable.

Abstract: An end seal assembly is mounted in a conduit or feedthrough body with a through bore of stepped diameter between its ends into which a fiber or wire-carrying metal cable extends. An inner end of the cable is stopped against a shoulder in the through bore, with at least one fiber or wire extending from the cable end out through the second end of the seal body. An end seal is seated at the outlet end of the seal body and has a through bore through which the or each fiber extends. The through bore is filled with epoxy material. The end seal is of a material having a coefficient of thermal expansion approximately equal to that of the epoxy material.

Abstract: ADSS cable is laid out a length of cable along an aerial route defined by a series of poles, and loops of surplus cable are formed at occasional poles. The cable is raised to a predetermined installation height at each pole, where two dead-ends secure the ends of the loop so that the loop is substantially free of tension. The center of the loop is raised and secured to the pole, thus forming two bights in the loop. A bend radius protector is installed in each of the bights to protect the cable from bending damage. Each bend radius protector is suspended from a cable protecting device placed over the taut cable, so that the cable is not damaged.

Abstract: A hermetically sealed optical fiber assembly according to the present invention includes an optical fiber having a metallic coating on at least one intermediate part thereof which is exposed by removing part of a coating on the optical fiber, a hermetic connecting component made of metal which receives the metallic coated part therein, and a brazing part for tightly fixing the metallic coated part of the optical fiber to an inner wall of the metal hermetic connecting component.

Abstract: An end seal assembly is mounted in a conduit or feedthrough body with a through bore of stepped diameter between its ends into which a fiber or wire-carrying metal cable extends. An inner end of the cable is stopped against a shoulder in the through bore, with at least one fiber or wire extending from the cable end out through the second end of the seal body. An end seal is seated at the outlet end of the seal body and has a through bore through which the or each fiber extends. The through bore is filled with epoxy material. The end seal is of a material having a coefficient of thermal expansion approximately equal to that of the epoxy material.

Abstract: An optical submarine branching unit for branching a trunk cable into first and second branch cables, including a pressure housing having a cylinder and first and second covers, a branching circuit unit accommodated in the pressure housing, a first feed through assembly mounted to the first cover so as to extend therethrough, for introducing optical fibers of the trunk cable into the pressure housing, and second and third feed through assemblies mounted to the second cover so as to extend therethrough, for introducing optical fibers of the first and second branch cables into the pressure housing, respectively. The branching circuit unit has a feeding unit and an optical circuit unit completely separated from the feeding unit. Each feed through assembly includes a sleeve and a pin inserted in the sleeve. The pin has a plurality of bosses each having a plurality of axial grooves. Multiple layers of optical fibers are received in each axial groove and extend along the pin.

Abstract: Disclosed is an optical fiber feedthrough that meets the industry load standard of 1 kg. The optical fiber feedthrough includes a length of optical fiber including a buffer layer and a core. The length of fiber extends along a longitudinal axis and typically through a passage in a package wall for communicating an optical signal between the exterior and the interior of the package. The optical fiber feedthrough includes a volume of bonding agent adhering to the buffer layer and to a bonding surface integral with the package, the volume of bonding agent disposed for asymmetrically securing the fiber to the package such that a load of less than approximately 1 kg applied to a first end of the length of fiber substantially not transmitted to the other end of the length of fiber. The invention also includes feedthrough assembly having a feedthrough to which the length of optical fiber is asymmetrically secured. The feedthrough body can be secured to the package wall of the optical package.

Abstract: A submarine optical gain equalizer installed on a submarine optical transmission cable 5. The submarine optical gain equalizer comprises a pressure housing 1, in which an optical gain equalizer and n through-fibers are installed. Input and output ports of the optical gain equalizer and the through-fibers are formed in the outside of the pressure housing. The submarine optical gain equalizer equalizes levels of signal light having wavelengths different each other caused by optical fiber amplifiers. In general, one submarine optical gain equalizer is installed for 40 optical fiber amplifiers on a submarine optical cable.

Abstract: A sensor array cable and method of construction thereof utilizing a sensor/interlink assembly to facilitate the relatively easy and inexpensive installation of a sensor device in a cable that includes a strength member to provide tensile strength to the cable, optical fibers or wires for carrying electrical or optical energy to and from the sensor device, and a protective outer jacket. A portion of the protective outer jacket is removed allowing access to the inner strength member and optical fibers. A segment of the strength member is removed and an interlink/sensor assembly is installed in its place. The interlink serves to maintain the tensile strength of the cable. Optical fibers and/or electrical wires are connected to the sensor device for operation. The interlink/sensor assembly and associated optical fibers and electrical wires are then enclosed in an overmold which is sealed to the outer protective jacket.