Abstract: There are disclosed an optical fiber splicing mechanism, an optical fiber splicing structure, and an optical fiber splicing method which are each capable of minimizing the size of an optical-fiber junction and the cost of splicing optical fibers as well as connecting the optical fibers reliably by a simple splicing process. Ends of two ferrules each having an optical fiber fitted therein are held in contact with each other, and the contact portions of the two ferrules are sheathed with a split sleeve. Further, the outside of the split sleeve is sheathed with a heat shrinking tube. Then, heat is applied to the heat shrinking tube to cause the same to shrink. The heat shrinking tube constricts the split sleeve by its shrinkage force, whereby the ferrules are fixed.

Abstract: A coupling sleeve is described which contains a sleeve body with a passage opening for accommodating a coupling partner on both ends respectively. An electroconductive shielding plate has a tongue protruding into the passage opening. The tongue is provided with an opening that has a width that matches a cross-section of a coupling partner.

Abstract: A rotary switch type optical fiber switch according to the present invention includes a plurality of lined-up sleeves disposed on at least one concentric circle about a reference axis and a fixed side ferrule with optical fiber mounting plate assembly for supporting fixed side ferrules with optical fibers. A movable side ferrule with optical fiber assembly supports a movable side ferrule with an optical fiber in parallel with the reference axis at a position apart from the reference axis a distance corresponding to the radius of the concentric circle and rotates about the reference axis as well as is movable in parallel with the reference axis.

Abstract: An optical fiber connecting sleeve (10) is constructed of a cylindrical portion (11) provided with a clearance (12). This clearance (12) extends in a longitudinal direction of the sleeve (10). The closer a circumferential distance away from the clearance (12) toward a circumferentially intermediate portion (15) of the cylindrical portion (11) approaches a half a circumferential length of the cylindrical portion (11), the more the wall thickness of the cylindrical portion (11) increases. Optical fiber connectors (50) are inserted into the opposite end portions of the cylindrical portion (11) and brought into abutting contact with each other in an axially intermediate portion of the cylindrical portion (11) in a manner such that misalignment in axis of the optical fibers (52) of the connectors (50) is minimized. As a result, the light coupling loss in the abutting contact of the optical fibers (52) is reduced in comparison with the prior art. This realizes a high-quality telecommunication environment.

Abstract: A sleeve for an optical connector and a method of manufacturing the sleeve is provided. The sleeve is put between an optical fiber 6 and a transmitting module 4b or between an optical fiber 6 and a receiving module 4a so as to optically connect the optical fiber 6 and the transmitting or receiving module. The sleeve 1 integrally has a light-leading path 26 in a flat-headed conic shape, a peripheral projecting portion 27, an outer tube portion 28. A small-diameter end face 29 of the light-leading path 26 of the sleeve 1 faces the transmitting device 4b or the receiving device 4a. The peripheral projecting portion 27 projects from a peripheral surface of the other end portion 30, on a side of a larger diameter, of the light-leading path 26. The outer tube portion 28 is cylindrically formed and extends from a peripheral portion of the peripheral projecting portion 27. The outer tube portion 28 extends over an entire length of the light-leading path 26 along an optical axis P.

Abstract: At least one annular wall 6 into which a ferrule 5 for an optical fiber cable 30 is adapted to be inserted is provided in the housing 4 and exposed to the exterior. A protective frame wall 7 is provided on the housing 4 so as to project higher than the annular wall 6. The frame wall 7 is so arranged as to surround the annular wall 6, and projected upwardly and downwardly from both top and bottom sides of the housing 4. A top wall 9 for mounting a ferrule locking member 10 is formed integrally with the annular wall 6, and the top wall is positioned at the same height as the frame wall 7, and continued from the frame wall. There may be arranged a pair of the annular walls in parallel in proximity to each other. A receiving trunk 53 in a mating housing 48 continued to a light converting element 55 is adapted to be inserted into the annular wall 6, and the ferrule 5 is adapted to be inserted into the receiving trunk.

Abstract: The optical fiber connector of the invention includes two optical fibers facing to each other, in which one optical fiber of the two has a spherical end face, when the core diameter of the optical fiber having the spherical face is given by E1, the numerical aperture thereof by NA1, the refractive index by n1, the radius of curvature of the spherical face by r, the core diameter of the other optical fiber by E2, the distance between the two optical fibers by L, the focal length f of the optical fiber is expressed by f=r/(n1−1). Further, when the beam diameter on the end face of the optical fiber is given by Es, the beam diameter Es=2·L·tan(sin−1·NA1) is deduced, and the connection efficiency &eegr; of the two optical fibers satisfies the following inequality: E2/(E1+Es)<&eegr;<(E2/(Es+(L/f−1)·E1))2≦1.0, in the focal length f≦L; or E2/(E1+Es)<&eegr;<(E2/(Es+(1−L/f)·E1))2≦1.

Abstract: There are provided a method of manufacturing a glass part for connecting optical fibers, which allows insertion of optical fibers into the internal hole of the glass part smoothly, and glass parts for connecting optical fibers manufactured using the method. Predetermined parts of a glass tube having an internal hole are heated while pressure is applied into the internal hole, to expand the predetermined parts, thus forming tapered portions. As a result, a continuous curved surface can be achieved at the boundary between each tapered portion of each obtained glass part and the internal hole thereof, and the surface can be made smooth where the tapers are formed.

Abstract: The present invention relates to a variable optical attenuator having a first housing and second housing that interlock with one another such that the first housing is able to rotate both clockwise and counterclockwise 360 degrees relative to the second housing without any movement between the housings and along the x-axis. Additionally, the first housing member of the present invention has exterior rings that align with interior grooves of the second housing member. Thus, the distance between the end of the fibers can be varied by securing the exterior circular rings on the first housing with different interior grooves on the second housing.

Abstract: A tunable optical fiber buildout for coupling a first optical fiber cable to a second optical fiber cable is disclosed. The buildout is comprised of a buildout base formed about a longitudinal axis and a buildout cap constructed and arranged to be received within the base. The base is constructed and arranged to be received within the cap in one of a plurality of rotational positions about the longitudinal axis of the base so that the cap can be used to selectively optimize an optical signal passed through at least one of the first and the second optical fiber cables, respectively, as the cap is positioned in one of the plurality of rotational positions about the axis of the base.

Abstract: An optical fiber wavelength filter which has superior optical properties and a manufacturing method for the same are disclosed. The optical fiber wavelength filter is composed of: a pair of glass ferrules which are transparent to ultraviolet rays and which are provided with optical fibers; and a thin dielectric multilayer film filter fixed between the distal ends of the ferrules. To manufacture the optical fiber wavelength filter, the optical fibers are bonded and secured to the pair of glass ferrules which are transparent to ultraviolet rays and the end surfaces thereof are ground. Then, the multilayer film filter and an adhesive agent which is hardened by the ultraviolet rays are disposed between the distal ends of the ferrules with the optical fibers, and the optical axes are aligned using a V-groove aligning jig.

Abstract: An insert-rack plug connection can be created between at least one sleeve portion (2) on a relatively fixed-position mother board (3) and at least one plug portion (4) on a relatively mobile daughter board (5). With that, the plug arrangement comprises a plug housing (6) mounted to displace axially on the daughter board and possessing a plug ferrule (7) mounted under preloaded axial spring tension. In addition, engagement means (8) for engagement of the plug housing into an engagement position in the sleeve portion are provided on the plug housing. In the insertion direction (x), the plug housing (6) is supported either directly of indirectly on a spring-action thrust element (9), the spring force of said thrust element maintaining the support until the engagement position has been reached, and subsequently automatically releasing said support on continued thrust movement.

Abstract: An alignment sleeve in accordance with the present invention interconnects optical ferrules of dissimilar size and axially aligns the ferrules with precision in a mating relationship so as to reduce loss in the optical signal passed from one ferrule to the other. A plurality of lands on the inner wall of the alignment sleeve contact and hold the respective ferrules in a predetermined axial relationship with respect to one another. The alignment sleeve comprises a compliant material which conforms to slight variances in the diameters of the ferrules received by the alignment sleeve. The alignment sleeve advantageously provides for the interconnection of ferrules of dissimilar size with precise alignment of their respective cores, which reduces the connection loss of the two ferrules. The alignment sleeve can be mass produced using injection molding techniques. The mold utilized in the injection molding process includes a precision core pin that can be manufactured using a precision grinder or lathe.

Abstract: An improved optical fiber connector includes a pair of female bodies, each having a first end and a second end, a cavity defined in the first end and a tubular portion extending from the second end, the tubular portion having a diameter smaller than that of the cavity; and a tube fixedly held between the tubular portions and connecting the female bodies.

Abstract: An optical attenuator realizable at a lower cost, for easily attenuating a quantity of light transmitted through an optical fiber, an optical photometer using the optical attenuator and a method for controlling a quantity of light by the optical attenuator. The optical attenuator (10, 11) comprises: two ferrules (41, 42) provided so that top surfaces thereof are stood opposite to each other, in which an optical fiber (31, 32) is connected to a base edge portion on each of the ferrules and either or both of the ferrules can be moved along an optical axis of each ferrule; and a split sleeve (2) for holding the ferrules in the same axis line (X, Y).

Abstract: The invention relates to a fiber-optic connector (1) comprising a socket (2) and a plug (4) which are intended to be mated in order to join two optical cables. The connector according to the invention includes at least two sealing members, one of them being an interfacial sealing member (12) put under compression when the plug (4) and the socket (2) are being mated.

Abstract: The present invention relates to optical fiber connectors, for bringing optical fibers into contact with each other. In order to simplify manufacture and handling of the optical fiber connectors, for optical fiber cables for example, an optical fiber connector containing precision components has been developed which can be manufactured in large volumes, using inexpensive injection-molded parts of low weight, low physical size and which a can therefore have a low price per connector. Each connector consists of an outer cylindircal portion joined to a tapered portion constituting a breakage protector for a surrounded optical fiber where the cylindrical portion is arranged to be able to surround the optical fiber ferrule with a flange, a spring and a protecting sleeve.

Abstract: An optical connector includes an elongate housing. A partition wall is formed integral with and within the housing. The partition wall is formed with a sleeve holder and an elongate hole. When an engagement member is inserted into the housing, its leg is inserted through the elongate hole. An optical module is accommodated in a case by a spring member, and the case is in turn inserted in the housing. A split sleeve of the optical module is inserted in the sleeve holder, and the engaging member is held by the partition wall and the case. When an optical fiber connector plug is inserted in the housing, a ferrule is inserted into the sleeve and coupled to a rod lens of the optical module.

Abstract: A protection cap for use with a fiber coupler having at least a first housing comprises a casing defining a passage therethrough for receiving at least a portion of the housing, and a covering lid pivotally assembled to the casing for enclosing an end of the passage.

Abstract: A single-piece optical fiber coupling (1) is specified which has a housing (2) with at least two holder openings (3a, 3b), which are arranged coaxially and run towards each other, for the optical fiber ends (4a, 4b) to be connected, the holder openings (3a, 3b) each having an outer section (3c, 3d) with a threaded crimp (3g) and an inner section (3e, 3f) with a thread (3h) of lower depth.

Abstract: An alignment sleeve for precisely aligning a pair of ferrules, such as a pair of multifiber ferrules, is provided along with an associated assembly method. The alignment sleeve includes a sleeve member defining a lengthwise extending cavity opening through opposed ends thereof. The sleeve member can also define at least one window and, more commonly, a plurality of windows opening into the cavity. The alignment sleeve also includes a guide pin extending lengthwise through the cavity and a guide pin engagement member extending at least partially into the window defined by the sleeve member. The guide pin engagement member is bonded, such as by welding, to the guide pin such that the guide pin is retained in a floating relationship within the sleeve member. The sleeve member can also define an expansion window to accommodate expansion of the guide pin that is creating during welding of the guide pin.

Abstract: A new and unique connector adapter shutter door assembly retrofitable to many existing connector adapters or receptacles which becomes a part of the same by connectedly fitting or snapping into place. The shutter door assembly can be used as a safety device to prevent laser light from escaping when a connector is removed from an adapter or receptacle. Because of the ease with which the shutter door assembly can be retrofitted to existing adapters, it is possible to selectively install the shutter door assembly only when a safety hazard is present. Also the shutter door assembly can be used to shield a connector end to prevent foreign matter, such as dust and dirt, from entering the connector. The shutter door assembly is a molded one-piece structure and has inwardly hinged doors permitting one hand connector insertion and withdrawal. The streamline design of the shutter door assembly takes very little space when in use making it desirable for typical space constrained applications.

Abstract: A sleeve for connecting ferrules supporting optical fibers has a tubular body having a first end surface, a second end surface opposite the first end surface, an inner peripheral surface, and an outer peripheral surface. Convex projections are disposed on the inner peripheral surface of the tubular body and extend continuously from the first end surface to the second end surface of the tubular body.

Abstract: A split sleeve 1 for optical connectors is provided, which may be constructed from a single part with a reduced cost and which permits retention forces on larger and smaller ferrules to be easily adjusted in uniform manner. The split sleeve 1 includes a cylindrical member made from a metallic material, such as phosphor bronze or stainless steel, representing an appropriate spring-back action. A slit is extended in the axial direction from one end to the other end of the cylindrical member. One end portion 1a of the cylindrical member on one side of an intermediate portion is configured to have a larger diameter, while the other end portion 1b of the cylindrical member on the other side of the intermediate portion is configured to have a smaller diameter.

Abstract: A plug connection for connecting a light waveguide to a plug has a plug member with a connecting light waveguide extending from one side thereof having an end being spliced to a light waveguide of a light waveguide cable and at least one strain relief element being passed over the splice and connected to the plug member. The method of forming the plug connection includes providing a sufficient length of both the connecting light waveguide extending from the plug member and the light waveguide of the cable so that a connection in a normal, known splicing apparatus can be obtained outside of the position of the plug member and then conducting the strain relief element over the splice region and connecting it to the plug member.

Abstract: A fiber optic connector sleeve is provided which includes a sleeve housing defining a lengthwise extending passageway and a number of positioning ribs extending lengthwise through the passageway for engaging a fiber optic connector and for positioning the fiber optic connector within the fiber optic connector sleeve. For a sleeve housing defining a passageway having a number of corners in lateral cross-section, the positioning ribs are generally located in respective corners of the passageway in order to engage corresponding corner portions of the fiber optic connector. Additionally, the interior sidewalls of the sleeve housing that extend between the positioning ribs are typically recessed relative to the positioning ribs so as to provide clearance during the insertion of the fiber optic connector into the fiber optic connector sleeve. Moreover, the recessed interior sidewalls of the sleeve housing can be tapered in a lengthwise extending direction to facilitate molding of the fiber optic connector sleeve.

Abstract: An optical receptacle module includes an optical module unit including therein an optical device and carrying a sleeve, a ferrule holder fitted into the sleeve and holding therein a ferrule, a frame member mounted on the ferrule holder, and an adapter unit mounted on the frame unit and accepting an external optical plug, wherein the ferrule holder having an engagement part for engagement with the frame at a location away from the optical device with respect to an engagement part of the frame member used for engagement with the adapter unit.

Abstract: A light modulation system, wherein a light source provides light of a certain wavelength to be modulated by a material layer, which forms part of a specifically configured plate assembly. The modulation layer is placed in the optical path of the light source. Further, the modulation layer is switched between first and second states, and cooperates with the light source to produce a train of pulses at a given pulse rate. The resulting optical pulses transmitted through the modulation layer are converted from the original certain wavelength to a lower wavelength by a frequency converting device.

Abstract: The present invention relates to optical connectors and concerns a connector (1) for connecting at least one optical fibre (2) in a so-called integrated optical interface, wherein a ferrule fiber end, in order to contact a second ferrule fiber end, is pressed towards said second end and is retained in this position. Because the first ferrule (11), creating the optical interface, is placed just outside a wall in an opto-electrical component (3), and the second ferrule (6), of a same kind of or similar ferrule, is placed inside the connector (1), it is possible to mutually align two optical fibers in a cost efficient way. In order to retain the contact between the fiber ends in a contact position, the connector (1) comprises two hook members (12), the hooked ends (13) of which can be hooked into grooves (14) provided in the component (3).

Abstract: There is to provided a photoreceptacle capable of stabilizing th connection between an optical fiber connector and the photoreceptacle and of commonly using an optical fiber connector having ferrules of the same shape. A cylindrical elastic body for elastically pressing and supporting outer diameter portions of ferrules of an optical fiber connector is integrally mounted on a photoreceptacle. The photoreceptacle comprises a cylinder which is inserted into the optical fiber connector and a collar attached to a photodetector. The collar has an outer configuration not to contact adjacent ferrules of a multi-core optical fiber connector when the multi-core optical fiber connector is inserted into the photoreceptacle.

Abstract: A bulkhead feedthrough assembly has a first end for releasable mating engagement with an underwater cable, a second end for releasable mating engagement in a bulkhead opening, and a through bore for guiding a plurality of leads from the cable through the bulkhead opening. A seal member is releasably mounted in the bore, and has a plurality of through bores equal to the number of leads, each lead extending through a respective bore. The seal member in an unstressed condition has an outer diameter greater than the feedthrough bore diameter, and each of the seal member through bores has an unstressed diameter less than the diameter of the respective lead, so as to resist leakage of seawater past the seal member.

Abstract: An optical fiber splicing module includes a receiving housing having a longitudinal cavity with two fiber insertion orifices through two end walls of the cavity, a fiber immobilizing member and a pressing arrangement in the cavity and a closure cap that can be clipped to the housing. The fiber immobilizing member substantially closes off the cavity and carries the pressing arrangement which is therefore received facing a groove in the bottom of the cavity and aligned with the orifices. The cap can be clipped to the housing in such a way as to define two positions of the member in the cavity, for allowing the fibers to pass and for immobilizing them in the groove.

Abstract: A ferrule for an optical connector wherein the work efficiency of the manufacture is increased by reducing the time necessary for grinding and the reliability of the connection of the optical connectors is improved. A front end surface (2) of a ferrule (1) comprises a flat surface (16) vertical to the central axes of optical fiber insertion holes (3) and a slanting surface (15). A step (17) is provided at the upper end of a slanting surface (15) and the flat surface (16) protrudes frontward by the step (17) with respect to the slanting surface (15). The optical fiber insertion holes (3) open at the slanting surface (16) and pin engagement holes (4) are provided on both sides of the optical fiber insertion holes (3).

Abstract: The invention relates to an adapter for optica fiber connectors for connecting a first optical fiber connector, which has a first optical fiber end which is mounted in a sleeve, the end face of the optical fiber end and the sleeve extending perpendicular to the longitudinal axis of the first optical fiber, to a second optical fiber connector, which has a second optical fiber end, which is mounted in a sleeve, the end face of the optical fiber end and the sleeve extending obliquely to the longitudinal axis of the second optical fiber. The adapter has an optical fiber section which is mounted in a sleeve, and it is the case that the first end face extends perpendicular to the longitudinal axis of the optical fiber section, and the second end face extends obliquely to the longitudinal axis of the optical fiber section. An optical fiber connector can be inserted from either end of the adapter. Direct coupling takes place between the optical fibers.

Abstract: A connector system for multiple fiber optical cables aligns multiple optical fibers of one coaxial cable with corresponding multiple optical fibers of another coaxial cable or tool head. This is accomplished by forming off-axis fiber holes in the flat connector face of an end terminator for one of the multiple fiber cables. Similar off-axis fiber holes, in the same pattern as in the first cable end terminator, are formed in a second cable end terminator. Alignment flats are located adjacent the faces of each of the end terminators; and a coupling sleeve, having a slot in each of its ends for fitting over the alignment flats, is used to align the fiber holes in each of the end terminators with one another when the coupling sleeve is secured in place on the end terminators.

Abstract: An optical fiber connector comprising a base and a lid member constituting an element having a doubly split structure which forms a roughly rod-like shape when united, and a spring for housing the base and lid member and applying pressure for pressing them together, wherein centering grooves for positioning and centering optical fibers for adjoinment and connection are provided in at least one or between the opposing faces of the base and lid member which are put together. In a mode wherein the element is inserted into a C-shaped spring having a rod shape with a C-shaped cross section, the optical fibers which are inserted from both ends of the element are pushed to the centering groove and adjoined into connection. By inserting or withdrawing wedges into wedge insertion grooves formed between the base and the lid member, it is possible to open or close the element.

Abstract: The invention provides a structure of an optical connector and an aligning method which are capable of easily accomplishing the alignment between optical fibers without pre-alignment before the assembling of the optical connector and disassembling of an optical connector assembly. A tube base fixed to a ferrule body has a plurality of fitting portions and a plurality of notch portions on its outer circumferential surface. The axial length A1 of the fitting portions is set to be shorter than the separation B between an end surface of a holder and an end surface of projecting portions of an optical connector housing. At the alignment, the ferrule body is pressed against a spring to be retreated. In this state, the fitting portions can pass in the separation B to allow the ferrule body to rotate. When releasing from the pressing against the spring, at that rotational position the ferrule body is returned by the restoring force of the spring so that the fitting portions again come into the engaged condition.

Abstract: The invention relates to a device for connecting a fiber optic cable to the fiber optic connection of an endoscope. An end section of the optical fiber is mounted as a bundle of fibers in a housing part and a coupling part is provided for the fastening with a positive fit of this housing part to the fiber optic connection on the endoscope side. To ensure that the optical fiber ends always come into contact with one another free of play and to improve the cleaning access, the coupling part is arranged on the housing part axially displaceable against a spring force in the direction of the fiber optic connection on the endoscope side.

Abstract: A fiber optic connector assembly is provided for terminating at least one optical fiber of a fiber optic cable. The assembly includes an outer housing having a forward mating end, a rear end and a mounting post for mounting the connector assembly on a printed circuit board. An inner housing insert is mounted within the rear end of the outer housing. The insert includes at least two interengageable parts. One of the insert parts includes a latch for securing the inner housing insert in the outer housing. A ferrule terminates the optical fiber and is captured between the two interengageable insert parts and projects into the forward mating end of the outer housing.

Abstract: A multifibre connector plug (1) comprises a connector plug part (6) for receiving a plurality of optical fibres (2), a coupling body (10) and a coupling sleeve (19). The connector plug part is provided with a contact face (7) at one end and is slidable in the coupling body. The connector plug part projects out of the coupling body with its end having the contact face. The coupling sleeve (19) encloses the coupling body and is slidable on this coupling body from a coupling position into a decoupling position against the action of a spring means (21). The spring means (21) comprises at least one spring (21) being an integrated unitary part of the coupling sleeve (19) and a free end (22) of the spring means engaging a corresponding support shoulder (23) of the coupling body (10).

Abstract: A filtering connection to optical light cable is a body having a hollow bore extending through the body, with a single or multicomponented optical element positioned coaxially in the hollow bore. An interior threaded portion with a standard thread is formed at one end of the hollow bore while an exterior threaded portion with a mating standard thread is formed about the other opposite end of the hollow bore.

Abstract: An optical fibre device, including an optical connector disposed therein, a recess allowing a through connector to be connected to the optical connector, and an engagement mechanism which enables release of the through connector when connected to the optical connector.

Abstract: A splicer for light waveguides is disclosed, including a receptacle including a first body of a predetermined length, having first recesses cut lengthwise through the center of the contact surface, and a second body of length the same as that of the first body, having second recesses cut lengthwise through the center of the surface corresponding to the first recesses cut through the first body; expanding means for expanding space separating the first and second bodies in order to easily insert light waveguides into the recesses; and bending means surrounding the receptacle's outer surface that securely hold first and second bodies together and provide the necessary clamping force.

Abstract: A plug portion (1) for an optical plug connector has a plug casing (2) in which at least one connector pin (3) is held. A protective flap (4) for protection of the connector pin is pressed under spring tension against the face (7) of the plug casing. The protective flap is mounted to pivot and slide on an approximately linear guide path (5) in such a way that, on insertion of the plug portion into a sleeve portion, it is able to move from a closed position on the face of the plug casing into an opened position that is set back in relation to the face (7). In order to pre-load the protective flap under spring tension throughout its entire slide- and pivoting-travel, a compression spring is arranged on the plug casing (2) approximately parallel to the guide path (5), said compression spring impinging either directly or indirectly upon the protective flap (4) above the plane of the guide path (5) between the closed position and the opened position.

Abstract: Disclosed is an improved optical fiber cable connector having at least one pair of ramp projections inclined inward to engage an optical fiber cable for preventing removal of the cable from the connector by a pulling force applied to the cable.

Abstract: A fiber optic connector system for mating a fiber optic plug to a fiber optic jack that utilizes a springboard latch on the jack having a cam surface which mates with a recessed cam surface on the fiber optic plug to inwardly bias the plug into the jack.

Abstract: An optical connector ferrule of this invention includes a holding portion arranged at a position along an inserting direction of optical fibers to constitute a front surface of the ferrule and having a plurality of first through holes for inserting the optical fibers therethrough and two second through holes for inserting guide pins, the holding portion holding portions of the optical fibers near distal ends thereof, the second through holes and the first through holes having central axes that are substantially parallel to each other, and the first through holes being arrayed in two rows in a direction connecting centers of the second through holes; and an optical fiber tape accommodating portion having an insertion opening for inserting therethrough optical fiber tapes having the optical fibers held by the holding portion, an internal space for partially accommodating the optical fiber tapes, and an injection opening for injecting therethrough an adhesive for adhering and fixing the inserted optical fiber ta

Abstract: The present invention provides an adapter for sealingly receiving ferrules of standard optical fiber connectors such that the end faces of the ferrules are protected from moisture when inserted into the adapter. The adapter has a sealing sleeve that defines a sealing surface at each end to circumferentially seal about a ferrule. An alignment sleeve that is sized for operatively aligning the end faces of the ferrules is disposed coaxially inside the sealing sleeve. A retainer retains the sealing sleeve and allows for mounting of connectors thereto.

Abstract: An adapter assembly is provided for interconnecting a pair of opposing optical fiber connectors generally along an optical axis. A unitary adapter housing has an axial cavity extending in a direction between opposite ends thereof. One end of the housing has a first interconnection operatively associated with a first one of the air of opposing optical fiber connectors. A unitary insert is mounted in the axial cavity of the adapter housing and includes a second interconnection operatively associated with the second of the pair of opposing optical fiber connectors at the opposite end of the housing.

Abstract: A fiber optic connector comprising a plug and a receptacle uses the spring force supplied by bowing of the plug fiber to maintain a continuous compressive load at the fiber joint located in a fiber-alignment groove. The plug has a holder for securing the plug fiber and a shroud which snaps onto the holder with the plug fiber extending generally straight inside the shroud. The shroud has a slot providing access to the terminal portion of the plug fiber, and a sliding door which selectively covers the slot. The receptacle includes a housing and another fiber holder for securing the receptacle fiber, with a projection or finger attached to the receptacle fiber holder, the projection having the fiber-alignment groove. The finger is oriented within the receptacle housing such that, when the plug is inserted into the receptacle, the finger extends through the slot in the shroud at an oblique angle with respect to the plug axis.