Abstract: A two-piece ferrule assembly for terminating and mounting the end of an optical fiber in a threaded female socket. The assembly has an inner ferrule member with a channel for receiving and mounting the end of an optical fiber from which the jacket has been removed, and an outer ferrule member mounted to rotate on a rear portion of the inner ferrule member and having an external thread mating with the female socket. The outer ferrule member extends over the fiber jacket, and includes a rear clamping portion adapted to engage at least one of the fiber jacket and the inner ferrule member to orthogonally clamp the fiber jacket behind its connection with the inner ferrule member as the outer ferrule member is threaded into the socket.

Abstract: A waveguide carrier is located within a carrier tube, and an optical waveguide extends lengthwise in a longitudinal direction within the waveguide carrier. The waveguide carrier is made up of a first carrier body having a first principal surface and a second carrier body having a second principal surface which confronts the first principal surface. The first principal surface has a first groove which extends lengthwise in the longitudinal direction, and the second principal surface has a second groove which extends lengthwise in the longitudinal direction. The first and second grooves are aligned with one another to define an elongate cavity which extends lengthwise in the longitudinal direction, and the optical waveguide is contained within the elongate cavity. The first and second carrier bodies may be fabricated by etching of one or more surfaces of a silicon wafer.

Abstract: Low-loss large diameter optical waveguide attachment devices (i.e., pigtails) and methods and systems of making the same are provided. The optical waveguide attachment devices may include an optical fiber (or other type waveguide) embedded in a larger diameter carrier tube. According to some embodiments, multiple laser beams (from one or more laser) may be utilized to uniformly heat the circumference of the carrier tube. According to some embodiments a maria may be formed in one end of the capillary tube to facilitate optical waveguide insertion and/or provide strain relief.

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: An apparatus and method of manufacturing multiple-port optical devices and packages includes the steps of positioning pairs of screened optical fibers in a precision ferrule of a collimating assembly; determining a desired angle of incidence (AOI) for an optical element; positioning the assembly in a movable fixture; moving the assembly into engagement with an optical element holder unit having an optical element mounted thereto; micro-tilting the element holder to actively align the optical element and fibers to preferably achieve an insertion loss (IL) less than about 0.2 dB; and curing adhesive to initially secure the aligned optical element assembly.

Abstract: A multiple-port optical device uses improved fiber ferrules comprising various capillary designs and shapes to precisely position optical fibers and, in particular, the optical fiber cores. The fibers are screened for geometric characteristics which further aide in precisely positioning the fiber cores. The ferrules, capillaries, fibers, and adhesives are combined to reduce adverse thermal effects and maintain the position of the fibers over a broad range of environmental conditions in which DWDM packages and modules are required to operate.

Abstract: A preliminary member of an optical device component with optical fiber comprises a long capillary tube made of glass or crystallized glass and an optical fiber which is fixed in the inner hole of the long capillary tube with adhesive. The overall length of the preliminary member is a plurality of times that of the optical device component or more. A plurality of short capillary tubes with optical fibers are formed by cutting the preliminary member. Thereafter, by polishing both end faces of the short capillary tube with optical fiber, an optical device component can be obtained.

Abstract: A groove portion to stay the adhesive agent penetrated into either one of closely contacted surfaces of the rod lens and the optical filter is formed, thereby, the penetration of the adhesive agent into the optical path is prevented.

Abstract: An optical module including a substrate having a groove; an optical waveguide layer formed on the substrate, the optical waveguide layer including an optical waveguide core having first and second ends, the first end being aligned with the groove, and an optical waveguide cladding covering the optical waveguide core; a ferrule having a through hole; and an optical fiber inserted and fixed in the through hole. The ferrule has a flat cut portion for semicylindrically exposing a part of the optical fiber inserted and fixed in the through hole. The ferrule is fixed at the flat cut portion to the substrate so that the part of the optical fiber exposed to the flat cut portion is inserted into the groove of the substrate until one end of the optical fiber abuts against the first end of the optical waveguide core.

Abstract: A plug connector for an optical waveguide (5), which has a sheathed, light-conducting core (1) and an outer cladding (3) which surrounds the core sheathing (2), having a plug part (6), which can be plugged together with a mating plug part (7), the plug part (6) forming a tube (8) for insertion of the core (1), which can be severed flush with the tube end (9), and the mating plug part (7) forming a shaft (10) for insertion of the tube (8), which shaft (10) at the foot side is directed toward a transmitting/receiving element (11). It is of relevance that the plug part (6) is of two-part configuration, having a retaining part (12), which includes the tube (8) and holding parts (13, 14) for the core sheathing (2) and also the outer cladding (3), and a cap part (15), which can be clipped in a watertight manner to the retaining part (12) and has a passage opening for the optical waveguide (5).

Abstract: A fiber optic connector has a preterminated fiber mounted within a ferrule and a fiber guide tube for guiding a terminating fiber into the ferrule to optically coupled the terminating fiber to the preterminated fiber, with an index matching gel extending between the terminating fiber and the preterminated fiber. An index matching gel is initially disposed on an end face of the preterminated fiber and inside of the fiber guide tube. The index matching gel is placed on an end face of the terminating fiber by passing the terminating fiber through the fiber guide tube, with a portion of the gel being wiped free of the terminating fiber periphery as the fiber enters the ferrule. A window extends through a sidewall of the fiber guide tube for applying an adhesive to secure the terminating fiber to the connector.

Abstract: An optical module including a substrate having a groove; an optical waveguide layer formed on the substrate, the optical waveguide layer including an optical waveguide core having first and second ends, the first end being aligned with the groove, and an optical waveguide cladding covering the optical waveguide core; a ferrule having a through hole; and an optical fiber inserted and fixed in the through hole. The ferrule has a flat cut portion for semicylindrically exposing a part of the optical fiber inserted and fixed in the through hole. The ferrule is fixed at the flat cut portion to the substrate so that the part of the optical fiber exposed to the flat cut portion is inserted into the groove of the substrate until one end of the optical fiber abuts against the first end of the optical waveguide core.

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: An optical fiber assembly including a ferrule which increases the glass transition temperature of an entire epoxy system resident within the ferrule and a method for suppressing optical instabilities of an optoelectronic package are described. One or more openings are made in a ferrule body to allow reaction gases from the epoxy caused during curing to escape, allowing a greater portion of the epoxy to fully cure, thereby raising the glass transition temperature of the epoxy system.

Abstract: A method for producing a holding configuration for at least one sheathed optical fiber conductor, which includes forming a holding body with a through-channel having a first channel section expanded over an expansion region into a second channel section opening into an outlet opening having a rounded rim.

Abstract: An optical fiber termination that includes fastening a plastic optical fiber end in a plastic contact tube, wherein the optical fiber end is introduced into the contact tube to a defined position, and the contact tube is subjected to ultrasonic energy whereby the contact tube and optical fiber end are joined together.

Abstract: A ferrule has a tubular body for supporting an end of an optical fiber having a coated end. A holder is disposed at a rear end of the tubular body for supporting the coated end of the optical fiber. A collar member is connected to the holder and has a through-hole through which a portion of the holder extends. A positioning groove is disposed at an outer peripheral surface of the collar member for positioning with respect to an optical connector housing.

Abstract: A fiber optic receptacle is provided that includes a receptacle housing and an adapter sleeve disposed therewithin and biased toward a first end of the receptacle housing through which a fiber optic plug is inserted. In an embodiment, the fiber optic receptacle includes the adapter sleeve is biased toward a first end of the receptacle housing through which a fiber optic plug is inserted in order to maintain physical contact between front faces of the plug ferrule and the receptacle ferrule without requiring that the fiber optic connector of the fiber optic plug be latched to the adapter sleeve, thereby increasing the float between the respective ferrules. In another embodiment, a fiber optic plug and receptacle assembly is provided in which either the plug or the receptacle includes an alignment stop while the other one includes an alignment feature and a stop feature to ensure alignment of the plug and receptacle and to limit insertion of the plug within the receptacle.

Abstract: An optical device includes a rigid pipe provided to cover the outer peripheries of a fixing joint portion and an optical fiber. The tip portion of the rigid pipe has a gap for providing flexibility between the optical fiber and the tip portion. Therefore, the rigid pipe suppresses bending of the optical fiber to avoid concentration of stress in the fixing joint portion for fixing the optical fiber to an optical unit section, thereby avoiding breakage of the optical fiber in the fixing joint portion.

Abstract: The ferrule of the prior art requires an assembling process, high accuracy machining of the fitting portion, machining of the insert to achieve concentricity, machining of the cone and machining of the outer diameter with a high accuracy. This has been making a factor that increases the production cost of the ferrule which is required to have lower price. The present invention provides an ferrule comprising an insert of substantially cylindrical shape that has a fine hole for housing an optical fiber in the axial direction, and an ferrule body made of a resin for accepting the insert fitted therein, characterized in that: the ferrule body has a through hole made in the axial direction thereof, and the through hole communicates with the fine hole of the insert via a tapered hole, with concentricity between the fine hole of the insert and the periphery of the ferrule body being within 10 &mgr;m.

Abstract: An optical module including a substrate having a groove; an optical waveguide layer formed on the substrate, the optical waveguide layer including an optical waveguide core having first and second ends, the first end being aligned with the groove, and an optical waveguide cladding covering the optical waveguide core; a ferrule having a through hole; and an optical fiber inserted and fixed in the through hole. The ferrule has a flat cut portion for semicylindrically exposing a part of the optical fiber inserted and fixed in the through hole. The ferrule is fixed at the flat cut portion to the substrate so that the part of the optical fiber exposed to the flat cut portion is inserted into the groove of the substrate until one end of the optical fiber abuts against the first end of the optical waveguide core.

Abstract: A fiber optic connector including a molded alignment coupler including a base plate, an opening in the base plate, and at least one alignment channel in the base plate. A housing upstanding from base plate surrounds the opening and the one alignment channel; and an insert plate is placed in the housing, the insert plate including an opening etched therethrough corresponding to the opening in the base plate of the coupler, and at least one channel etched in the insert plate corresponding to the alignment channel of the coupler.

Abstract: A fiber management system is provided for a plurality of optical fibers which project beyond an end of a dielectric of a fiber optic cable. The system includes a support secured to the dielectric of the cable. A plurality of tubes are fixed to the support and extend away from the end of the dielectric, with the fibers positioned within the tubes.

Abstract: Transparent parallel planar plates which are members for retaining an optical waveguide are provided erectly in an optical path of light in a transparent vessel in advance. An optical fiber is fixed into the transparent vessel while the optical fiber penetrates the transparent vessel, and an optical sensor is also disposed adjustably. Next, a first photo-curable resin solution is injected into the transparent vessel, and light with a predetermined wavelength for curing is emitted from the optical fiber so that the optical waveguide is self-formed by polymerization reaction. Because the parallel planar plates are transparent, the optical waveguide is formed so as to be extended again from the emission ports of the parallel planar plates. Finally, the optical waveguide is formed so as to reach a bottom surface of the transparent vessel.

Abstract: An optical module including a substrate having a groove; an optical waveguide layer formed on the substrate, the optical waveguide layer including an optical waveguide core having first and second ends, the first end being aligned with the groove, and an optical waveguide cladding covering the optical waveguide core; a ferrule having a through hole; and an optical fiber inserted and fixed in the through hole. The ferrule has a flat cut portion for semicylindrically exposing a part of the optical fiber inserted and fixed in the through hole. The ferrule is fixed at the flat cut portion to the substrate so that the part of the optical fiber exposed to the flat cut portion is inserted into the groove of the substrate until one end of the optical fiber abuts against the first end of the optical waveguide core.

Abstract: A ferrule product 30b is utilized in an optical module 5 comprising a semiconductor optical amplifier 55 having a pair of end facets. The ferrule product 30b comprises an optical fiber 51 and a ferrule 52. The optical fiber 51 has one end part, optically coupled with one of the pair of end facets, a first part including a grating 511 disposed at a predetermined position separated from one end part, and a second part different from the first part. The ferrule 52 has a capillary part 521 for holding the optical fiber 51 and a flange part 522 for holding the capillary part. The flange part 522 is disposed on the second part.

Abstract: An optical module including a substrate having a groove; an optical waveguide layer formed on the substrate, the optical waveguide layer including an optical waveguide core having first and second ends, the first end being aligned with the groove, and an optical waveguide cladding covering the optical waveguide core; a ferrule having a through hole; and an optical fiber inserted and fixed in the through hole. The ferrule has a flat cut portion for semicylindrically exposing a part of the optical fiber inserted and fixed in the through hole. The ferrule is fixed at the flat cut portion to the substrate so that the part of the optical fiber exposed to the flat cut portion is inserted into the groove of the substrate until one end of the optical fiber abuts against the first end of the optical waveguide core.

Abstract: A ferrule for an optical connector, comprising: a ferrule body formed of a resin and including a through-hole having an inner wall for releasably receiving an optical fiber, the inner wall of through-hole being defined by a large-diameter portion and a small-diameter portion which are axially aligned; and a metallic pipe disposed on at least part of the inner wall of the through-hole, said metallic pipe being formed of at least one of an alloy of iron-nickel and an alloy of iron-nickel-cobalt.

Abstract: A fiber optic connector has a preterminated fiber mounted within a ferrule and a fiber guide tube for guiding a terminating fiber into the ferrule to optically coupled the terminating fiber to the preterminated fiber, with an index matching gel extending between the terminating fiber and the preterminated fiber. An index matching gel is initially disposed on an end face of the preterminated fiber and inside of the fiber guide tube. The index matching gel is placed on an end face of the terminating fiber by passing the terminating fiber through the fiber guide tube, with a portion of the gel being wiped free of the terminating fiber periphery as the fiber enters the ferrule. A window extends through a sidewall of the fiber guide tube for applying an adhesive to secure the terminating fiber to the connector.

Abstract: A multiple-port optical device uses improved fiber ferrules comprising various capillary designs and shapes to precisely position optical fibers and, in particular, the optical fiber cores. The fibers are screened for geometric characteristics which further aide in precisely positioning the fiber cores. The ferrules, capillaries, fibers, and adhesives are combined to reduce adverse thermal effects and maintain the position of the fibers over a broad range of environmental conditions in which DWDM packages and modules are required to operate.

Abstract: An optical module including a substrate having a groove; an optical waveguide layer formed on the substrate, the optical waveguide layer including an optical waveguide core having first and second ends, the first end being aligned with the groove, and an optical waveguide cladding covering the optical waveguide core; a ferrule having a through hole; and an optical fiber inserted and fixed in the through hole. The ferrule has a flat cut portion for semicylindrically exposing a part of the optical fiber inserted and fixed in the through hole. The ferrule is fixed at the flat cut portion to the substrate so that the part of the optical fiber exposed to the flat cut portion is inserted into the groove of the substrate until one end of the optical fiber abuts against the first end of the optical waveguide core.

Abstract: A multiple-port optical device uses improved fiber ferrules comprising various capillary designs and shapes to precisely position optical fibers and, in particular, the optical fiber cores. The fibers are screened for geometric characteristics which further aide in precisely positioning the fiber cores. The ferrules, capillaries, fibers, and adhesives are combined to reduce adverse thermal effects and maintain the position of the fibers over a broad range of environmental conditions in which DWDM packages and modules are required to operate.

Abstract: A coupler having converging corner-wall sections is disclosed. Convergence thereof provides the draft necessary to remove the coupler form a conventional plastic mold.

Abstract: A ferrule and an associated fabrication method are provided that facilitates fiber-to-fiber contact without requiring the end portions of the optical fibers to protrude beyond the front face of the ferrule. The ferrule includes a ferrule body having opposed front and rear faces and defining at least one optical fiber bore extending between the front and rear faces and adapted to receive an optical fiber. Advantageously, at least the medial portion of the front face through which the optical fiber bores open protrudes outwardly beyond at least some peripheral portions of the front face. By designing the front face such that the medial portion protrudes outwardly beyond peripheral portions of the front face, angular errors in the peripheral portions of the front face and dirt or other particles that accumulate on the peripheral portions of the front face will not prevent the medial portions of the front faces of a pair of ferrules from making contacting as the respective fiber optic connectors are mated.

Abstract: An article is disclosed having a non-planar surface with a high-resolution pattern formed thereon, particularly a distributed-feedback (DFB) ridge waveguide laser. An elastomeric member having relief patterns on its surface is used to print or mold a pattern directly onto the non-planar surface of the waveguide. A range of materials disposed on such non-planar surfaces can thus be patterned at high resolution to provide devices with sub-micron features at low cost with potential applications in optoelectronics. For example, a plastic laser based on molded organic gain materials may be made.

Abstract: To provide a ferrule tubular body and a ferrule which is free from a fear that the end face of the ferrule may be roughened, which can eliminate an eccentric adjustment process performed after an optical fiber is fixed, and which can attain the optical connection less in insertion loss. An indicator section 1d, 3a, 1e or 3b making it possible to observe an eccentric direction of a though-hole to which an exposed optical fiber end portion is inserted to be held is provided on the outer surface of a ferrule tubular body 1A, 1B, 1C, 1D and/or the outer surface of a flanged member 3A, 3B, 3C, 3D securely fixed to the rear end of the ferrule tubular body 1A, 1B, 1C, 1D.

Abstract: An optical module including a substrate having a groove; an optical waveguide layer formed on the substrate, the optical waveguide layer including an optical waveguide core having first and second ends, the first end being aligned with the groove, and an optical waveguide cladding covering the optical waveguide core; a ferrule having a through hole; and an optical fiber inserted and fixed in the through hole. The ferrule has a flat cut portion for semicylindrically exposing a part of the optical fiber inserted and fixed in the through hole. The ferrule is fixed at the flat cut portion to the substrate so that the part of the optical fiber exposed to the flat cut portion is inserted into the groove of the substrate until one end of the optical fiber abuts against the first end of the optical waveguide core.

Abstract: An optical terminal using a capillary with a central opening or a bore of a selected cross section and having an insertion opening and a coupling opening. The optical terminal has a light-guiding element, e.g., a lens, positioned in front of the coupling opening. Optical fibers having adjusted cross sections along a fitting length are inserted into the bore such that they are wedged inside it, their tips are positioned at the coupling opening and their cores are offset by a specific distance or offset from the optical axis of the light guiding element. A number of fibers including optical and reinforcement fibers can be wedged in the bore in this manner to ensure a specific offset between the cores of the optical fibers and the optical axis. Precise control of the offset between the cores and the optical axis permits one to accurately control an output angle of light beams issuing from the optical fibers and exiting the optical terminal through the light guiding element.

Abstract: A preliminary member of an optical device component with optical fiber comprises a long capillary tube made of glass or crystallized glass and an optical fiber which is fixed in the inner hole of the long capillary tube with adhesive. The overall length of the preliminary member is a plurality of times that of the optical device component or more. A plurality of short capillary tubes with optical fibers are formed by cutting the preliminary member. Thereafter, by polishing both end faces of the short capillary tube with optical fiber, an optical device component can be obtained.

Abstract: A multifiber ferrule is provided that includes a ferrule body that defines at least one elongate hole opening through the front face of the ferrule body that, in turn, includes a lead-in portion proximate the front face for guiding the respective alignment member into the elongate hole. The ferrule body at least partially defines one or more elongate holes, such as a guide pin hole or an alignment groove, each having a longitudinal axis extending therethrough. Each elongate hole includes the lead-in portion proximate the front face and an adjacent alignment portion. The lead-in portion expands radially outward from the longitudinal axis in a direction extending from the adjacent alignment portion to the front face of the ferrule body. As such, the opening of the lead-in portion through the front face of the ferrule body is larger in lateral cross-section than the opening of the lead-in portion into the adjacent alignment portion.

Abstract: The present invention relates to a method for enabling reliable, consistent alignment of a beam of light eating the end of an optical fiber, which has been cut at a non-perpendicular angle, with a collimating lens. The method involves utilizing a spherical shape to generate two bores in the object which intersect the center at a predetermined angle. The predetermined angle is equivalent to the angle of the light beam exiting the end of the optical fiber.

Abstract: A waveguide carrier is located within a carrier tube, and an optical waveguide extends lengthwise in a longitudinal direction within the waveguide carrier. The waveguide carrier is made up of a first carrier body having a first principal surface and a second carrier body having a second principal surface which confronts the first principal surface. The first principal surface has a first groove which extends lengthwise in the longitudinal direction, and the second principal surface has a second groove which extends lengthwise in the longitudinal direction. The first and second grooves are aligned with one another to define an elongate cavity which extends lengthwise in the longitudinal direction, and the optical waveguide is contained within the elongate cavity. The first and second carrier bodies may be fabricated by etching of one or more surfaces of a silicon wafer.

Abstract: A colored adhesive useful for an optical fiber connection or termination, containing an adhesive component having a viscosity between about 200 centipoise and about 5000 centipoise, a colorant which is soluble in the adhesive component having a first color before exposure to radiation having a wavelength of from about 400 to about 1100 nanometers, and a second color after exposure to radiation, and an initiator system to cure the adhesive composition by exposure to the radiation.

Abstract: In the capillary tube 22, the cross section of the outer surface is substantially square, and the cross section of the insertion hole 23 is substantially square. Sides La, Lb of the outer surface have high dimensional accuracy and the insertion hole 23 is made to allow two optical fibers 5, 6 to be inserted while adjoining each other and arranged in order therein. The phases of the outer surface and the insertion hole 23 are relatively offset with each other, so that angles &thgr;a, &thgr;b which the sides 23a, 23b of the insertion hole 23 form with flat surfaces 22a, 22b of the outer surface are acute angles of substantially 45°±0.5°. Consequently, the flat surface 22a becomes substantially parallel to the center line M that connects the centers of the cores 5a, 6a of the two optical fibers 5, 6 inserted in the insertion hole 23, and the flat surface 22b becomes substantially perpendicular to the center line M.

Abstract: An optical connector element having a coupling face for coupling to another optical connector element. It comprises: a ferrule; a ferrule holder co-operating with the ferrule to form a continuous ferrule assembly; a body receiving said ferrule assembly and open on the coupling face end so as to enable said ferrule assembly to be inserted into it; resilient means tending to urge the ferrule assembly inserted into the body so that it is pushed back out of said body; means for preventing the ferrule assembly from rotating relative to the body; and snap-fastening shapes on the ferrule assembly and on the body. The snap-fastening shapes on the body are situated on that side of the resilient means which is closer to the coupling face, and they are mounted on the body in a manner such that they can retract reversibly.

Abstract: A multifiber ferrule is provided that includes a ferrule body that defines at least one elongate hole opening through the front face of the ferrule body that, in turn, includes a lead-in portion proximate the front face for guiding the respective alignment member into the elongate hole. The ferrule body at least partially defines one or more elongate holes, such as a guide pin hole or an alignment groove, each having a longitudinal axis extending therethrough. Each elongate hole includes the lead-in portion proximate the front face and an adjacent alignment portion. The lead-in portion expands radially outward from the longitudinal axis in a direction extending from the adjacent alignment portion to the front face of the ferrule body. As such, the opening of the lead-in portion through the front face of the ferrule body is larger in lateral cross-section than the opening of the lead-in portion into the adjacent alignment portion.

Abstract: An optical fiber connector that is tunable despite being fully assembled has a assembly having an enlarged ferrule holding member or flange that has a multi-faceted periphery, preferably in the shape of a hexagon. The connector has a front housing portion that has a multi-faceted seating region for the flange. The flange is disengageable from the seating region for tuning rotation by being movable axially toward the rear of the housing against the force of a spring. The connector can be tuned by incremental rotations of the assembly when the flange is disengaged.

Abstract: An optical module including a substrate having a groove; an optical waveguide layer formed on the substrate, the optical waveguide layer including an optical waveguide core having first and second ends, the first end being aligned with the groove, and an optical waveguide cladding covering the optical waveguide core; a ferrule having a through hole; and an optical fiber inserted and fixed in the through hole. The ferrule has a flat cut portion for semicylindrically exposing a part of the optical fiber inserted and fixed in the through hole. The ferrule is fixed at the flat cut portion to the substrate so that the part of the optical fiber exposed to the flat cut portion is inserted into the groove of the substrate until one end of the optical fiber abuts against the first end of the optical waveguide core.

Abstract: A fiber optic connector for connecting fiber optic light cables together includes a light housing for connection to a first fiber optic light cable and a coupling for connection to a second fiber optic light cable. The coupling includes a cage having a spring for locking the light housing to the coupling to connect the first fiber optic light cable and second fiber optic light cable together into a single light source.

Abstract: The present invention discloses an improved wavelength division multiplexed (WDM) coupler. The WDM coupler includes a WDM filter attached to a first GRIN lens by applying a first heat-curing epoxy of high viscosity. The high viscosity epoxy is applied on peripheral areas of the first GRIN lens away from the optical path of the WDM coupler. The WDM coupler further includes the first GRIN lens with the WDM filter inserted into a first holding tube. The first holding tube is a two-segment holding tube having a segment near the high viscosity epoxy having a slightly greater inside diameter than a second segment away from the high viscosity epoxy. The first GRIN lens with the WDM filter is fixed into the first holding tube by applying a second heat-curing epoxy. The WDM coupler further includes a second holding tube holding a dual fiber pigtail.