Abstract: The present invention discloses an apparatus and method for a fiber optic housing and aligning device. A fiber optic housing and aligning device in accordance with the present invention comprises a housing, a directionally adjustable tubular casing that is mechanically coupled to a wall of the housing, and a collimator disposed within the directionally adjustable tubular casing, wherein the adjustable tubular casing comprises a convex spherical cap surface that mates with a concave seating surface of an opening within the wall and wherein the spherical cap surface may be attached to the housing by laser welding or by epoxy.

Abstract: A three-dimensional mounted assembly includes a molded body, a plurality of electronic parts sealed with the molded body, a plurality of interconnections electrically connected to the electronic parts and sealed with the molded body wherein part of at least one of the interconnections is exposed on a first side of the molded body and at least another one of the interconnections is exposed on a second side of the molded body differing from the first side.

Abstract: There is provided an optical communication apparatus, which is provided with a light emitting device that emits a transmission light signal modulated with transmission data, an optical fiber, and a deflecting system that is located between the light emitting device and the optical fiber so as to move a position of the transmission light signal on an entrance surface of the optical fiber. The optical communication apparatus is further provided with a feedback control system that controls the deflecting system so as to move the position of the transmission light signal to a center of a core of the optical fiber based on intensity of a portion of the transmission light signal.

Abstract: Optical isolator comprises a ferrule having a through-hole in which an optical fiber is inserted and a groove formed in the ferrule with the optical fiber inserted in the through-hole; and a composite assembly consisting of an optical isolator element composed of a Faraday rotator and a pair of polarizers fixed on opposite surfaces of the Faraday rotator in such manner that the angle between the directions of polarization of the polarizers is at about 45° and a structure reinforcing member having a thickness of filling the groove and surrounding the optical element, said composite assembly being inserted in the groove as a unit. The reinforcing member may be made of the same material as the outer support or formed by a magnet for applying a magnetic field to the Faraday rotator.

Abstract: An optical module comprises an first filter, an optical fiber for guiding light wave to a first end face of the filter, a second optical fiber for guiding a light wave transmitted through the filter from a second end face of the filter, a third optical fiber for guiding light wave to said second end face of the filter, a fourth optical fiber for guiding the light wave reflected by the filter and the light wave transmitted through the filter from said first end face of the filter, a plug connector for positioning said first and fourth optical fibers, and a socket connector for positioning said second and third optical fibers.

Abstract: A module for coupling to a fiber-optic cable includes an optoelectronic assembly that includes a bracket and a metal receptacle. The metal receptacle includes an attachment member operable to releasably connect the receptacle to the bracket, an alignment end operable to receive an alignment device, and a connector end operable to releasably connect to the fiber-optic cable and to orient the cable with the alignment device. The metal receptacle can suppress EMI and can typically withstand higher temperatures than most plastic materials. Thus, when subject to high temperatures, the receptacle typically will not expel gas that can fog a lens or deform. The attachment member allows one to releasably connect the receptacle to an optoelectronic assembly without fixing the receptacle to the assembly with adhesive. Thus, the receptacle can be mounted to an optoelectronic assembly quickly and without an alignment fixture.

Abstract: A plug in communications module for achieving bi-directional communication along a single fiber-optic cable in a fiber-optic network. The plug in module is made such that it plugs directly into fiber-optic communication equipment of standard form factors. Bi-directional communication is achieved by using a low-cost circulator. The plug in module also has a receptacle that is used for attaching a patch cable between the fiber-optic network in the plug in module.

Abstract: Given a component comprising at least one active area formed on a substrate and designed to be coupled to a light guide, a support is used, at least one hole is formed in the support starting from one face of this support, this hole being designed to receive one end of the guide, the substrate is fixed to the other face of the support by forming the hole facing the active area if the active area has already been formed, and otherwise it is formed on the substrate facing the hole and the end of the guide is placed in the hole. The optical system is obtained by optically coupling two devices thus obtained.

Abstract: A micro lens array has a quartz substrate and a coupling plate made of plated metal and mounted on the substrate. On one principal surface of the substrate, lenses and fitting pins made of plated metal are formed. The coupling plate has a transparent window which allows light from the lenses to pass therethrough and guide pin insertion holes gradually increasing the size from one principal surface toward the other principal surface. A taper of an opening end of each guide pin insertion hole defined by a plated layer can be formed by forming a plating seed layer and a plating area defining pillar on the substrate, with the plating seed layer being spaced apart from the pillar by a predetermined distance.

Abstract: An alignment assembly for an optics module includes an alignment stage that is enabled to provide an adjustment of the relative positioning of a light beam and a lens, but also includes a locking mechanism which disables the movement of the alignment stage following a one-time alignment procedure. The locking mechanism may include one or more heaters and meltable material which is heated during the one-time alignment procedure and cooled when the target relative position between the beam and the lens is achieved.

Abstract: When an optical member which have a plurality of luminous flux converters formed in a line on a surface of an optical substrate is mounted on a support substrate having at least one groove, at least two parts of the side surfaces of the optical member are brought into contact with the groove to perform positioning, and an adhesive agent is filled between at least one part of a portion which opposes the groove on the plane of the optical member and which is not in contact with the groove and the support substrate to cause the optical member and the support substrate to adhere to each other.

Abstract: A fiber optic array (90) is provided having fibers (24) positioned at a selected angle relative to the output face of the array. The array includes first (20) and second (30) substrates each of which has a plurality of fiber passageways extending therethrough. The substrates are positioned relative to one another such that each passageway (22) of the first substrate is registered to a respective passageway (32) of the second substrate. An optical fiber is disposed in each pair of registered passageways. The passageways are dimensioned to permit the optical fiber disposed therein to be positioned at a range of angles relative to the output face of the array. The first and second substrates are moved relative to one another to select an angle from the range of angles at which the fibers are oriented relative to the output face of the array. A method for fabricating such a fiber optic array is also provided.

Abstract: A method of optimally aligning an optical fiber to a semiconductor laser diode, aligns the optical fiber to the semiconductor laser diode, attaches a solder preform onto the optical fiber, and applies a low power localized heat to the solder preform in order to thermally shift the optical fiber downward into an optimized alignment. The method may further include intermediate alignment steps including application of a preload force on the fiber in a direction compensatory to the direction of misalignment, and activation of a high power localized heat to reflow the solder so that the fiber may be moved to the optimized position. These steps may be performed multiple times until a substantially optimized coupling is achieved.

Abstract: An optical receiver comprises (a) an optical fiber, (b) a rear-illuminated type PD for receiving incoming light emerging from the optical fiber, (c) a submount supporting the PD, (d) a coaxial type package housing the submount, and (e) a preamplifier IC for amplifying electric signals from the PD. In particular, the submount is provided with a reflecting face for reflecting the incoming light so that the light can enter the PD. The submount may be provided with an optical path-forming groove having at least one reflecting face for introducing and reflecting the incoming light so that the light can enter the light-receiving portion of the PD mounted on the submount. This structure enables the production of an optical receiver most suitable for high-speed response and excellent in productivity. A method of producing the optical receiver is also offered.

Abstract: This application describes, among others, wafer designs, testing systems and techniques for wafer-level optical and optoelectronic testing by coupling probe light to/from the top of the wafer. In the described exemplary implementations, wafers are designed with one or more optical alignment features or structures. The alignment structures are alongside the devices to be tested, but are easier to find or locate by optical means, than the devices to be tested. An optical diffraction grating structure such as a Littrow grating may be used as reflective alignment structures. (FIG. 6B and paragraph 56.) A Littrow grating as an alignment structure produces a retro-reflection. A Littrow grating is a one-port optical device, with input and output beams going along the same path. Various exemplary implementations are shown in FIGS. 3C, 5, 6A, 6B, 7A and 7B and described in paragraphs 18–21, 39–40 and 53–64.

Abstract: In addition to the optically passive alignment between the optical fiber and the semiconductor device using a V-groove provided on a substrate made of silicon single crystal, the active alignment therebetween may be carried out for enhancing the optical coupling efficiency. According to the present invention, the optical module provides a coupling member including a center waveguide and a sheath member covering the center waveguide. The outer shape of the sheath member is an elliptic so that the center position of the center waveguide may move as the coupling member rotates in the V-groove such that the outer surface thereof touches two sides of the V-groove. Accordingly, the optical coupling efficiency with the semiconductor device may be varied. The ellipticity of the elliptic outer shape is preferably greater than unity and not greater than 2, and the bottom angle of the V-groove is preferably not smaller than 60° and not greater than 120°, in particular, the angle is preferably a right angle in substance.

Abstract: A method of splicing optical fibers includes affixing a first fiber to a first keying element having a particular radial orientation, inserting the keying element in a support which receives the keying element only in a specific radial orientation, cleaving the fiber affixed to the inserted keying element at a predetermined angle (?) relative to the support to form an angled fiber end face, removing the keying element from the support, inserting the keying element into a splicing body which receives the keying element only in a specific radial orientation such that the angled fiber end face has a predictable radial orientation with respect to the splice body, and repeating the above operations for a second fiber and a second keying element, whereby the first angled fiber end face and the second angled fiber end face abut in a substantially parallel orientation.

Abstract: An optical element is aligned on a flexure by applying multiple laser pulses to the flexure. Additional laser pulses are applied until the optical element is aligned properly.

Abstract: The invention relates to an apparatus for fixing a fiber at the center of a ferrule comprising a heating stage, a temperature controller, at least one charge-coupled device, a first moving stage, a processor unit and a solder material feeder. The heating stage is used for mounting and heating the ferrule. The charge-coupled devices are used for monitoring the position of the fiber in the ferrule, and one of the charge-coupled devices is connected to the processor unit so as to measure the eccentric offset of the fiber in the ferrule. The first moving stage is used for mounting the fiber and adjusted the position of the fiber so that one end of the fiber is disposed near a inlet of the ferrule and inserting the fiber into the ferrule after alignment. The solder material feeder is used for sealing the ferrule with the solder material. The present invention also relates to a method for fixing a fiber at the center of a ferrule.

Abstract: The light guide substrate 2 has mirror receiving grooves 24 and light guides. The light guides conduct light that is input into the input ports to selected output ports in accordance with the advance and retraction of the mirrors 31 with respect to the grooves 24. The actuator substrate 4 has mirrors 31 and actuators which place the mirrors 31 in a state in which the mirrors are drawn in toward the substrate 4, or a state in which the mirrors protrude from the substrate 4. The light guide substrate 2 and actuator substrate 4 are aligned using alignment marks and joined with a spacer 3 interposed so that the mirrors 31 retract from the grooves 24 when the mirrors 31 are drawn in toward the substrate 4, and so that the mirrors 31 advance into the grooves 24 when the mirrors 31 protrude from the substrate 4. This alignment is performed in a state in which all of the mirrors 31 are drawn in toward the substrate 4.

Abstract: An integrated type optical coupling device capable of easily accurately performing an optical arrangement between a narrow-pitch multi-channel optical waveguide and an optical fiber array and a master used in fabricating the same are provided. By forming a fixing projection between the optical fibers, the dynamic stability of the optical fiber array is increased and the optical arrangement between the optical waveguide and the optical fiber is easily accurately performed by hand. Accordingly, the cost required for the alignment is reduced and the alignment error due to the rolling of the optical fiber is not generated. In addition, the multi-step metal master is fabricated by using a photoresist film for X-ray exposure, and the narrow-pitch multi-channel optical coupling device is fabricated in a hot embossing method using the same, thereby the high-integrated device can be fabricated at a low price.

Abstract: A local injection and detection system assesses the attenuation of light propagating from a first optical fiber to a second optical fiber associated therewith. The system comprises a light injector, a light detector, a driver to energize a light source in the injector, and a receiver. Light from the light source is injected into the first optical fiber and propagates therethrough. A portion of the propagating light in the second fiber is extracted onto a light responsive element in the detector. The system is particularly adapted for use in a system for splicing optical fibers, the system minimizing the insertion loss of the joint by optimally aligning the fibers prior to fusing them. In addition, the insertion loss of a joint can be inferred by comparing light attenuation before and after the joint is fused. The present system is compact and low in profile, enabling it to be used with a fusion splicer that operates with minimal clearance to adjacent equipment and structures.

Abstract: The array ferrule of the present invention has a main body having a fiber receiving cavity which extends therethrough from a mating face to a rear end. A pair of pin slots is formed in opposing side walls of the main body being precisely located with respect to the fiber receiving cavity. In communication with each pin slot is a retention member slot for receiving a pin retention member. A plurality of fibers is precisely positioned within the fiber receiving cavity and an encapsulant substantially surrounds the fibers to substantially fill the fiber receiving cavity. A method of making the array ferrule begins with providing a ferrule blank having a pair of preformed slots extending inward from the opposing side walls. The blank is precisely aligned on a mandrel which is placed within the fiber receiving cavity. Pin slots are broached in each side surface in the area of the preformed slots to form the ferrule main body.

Abstract: The opto-electrical module packaging installs opto-electrical devices on a conductive leadframe to form an opto-electrical module. The opto-electrical module is then packaged using a molding packaging means, forming a transparent plastic base. The transparent plastic base is installed with a convergent lens to focus light. The leadframe has a plurality of pins and is mounted on the circuit board by soldering. This forms a packaging structure without bare pins exposed to the environment. In addition, the leadframe has a precision alignment structure extending outward as the alignment mechanism when assembled with a fiber connector. The precision packaging procedure provides a precision alignment of the converging lens and the opto-electrical devices at the same time.

Abstract: The polarization axes of the ends of two PM fibers are aligned in an automatic fiber splicer by first making a linear alignment of the fiber ends (1, 1?) using movable retainers (21) the same way as for conventional splicing. The fiber ends are rotated by rotatable fixtures (22) to capture images by a camera (9) and therefrom, in an image processing and analysis unit (15), as controlled by logical circuits (33) light contrast profiles are determined as functions of the angular position. From the light contrast profiles the polarization axes are determined and then they are aligned with each other. The images are captured of an area at and around the fiber ends as seen in an observation plane. This observation plane is taken to have such a position that the variation of the light contrast profiles is sufficiently large, this making the determination of the angular positions of the polarization axes have a sufficient accuracy, also for for example elliptical core fibers.

Abstract: An optical subassembly (OSA) with components including a microelectromechanical structure (MEMS) is formed with a jig. The jig includes a jig clamp and a jig stencil and allows for the optical components of the OSA to be optically aligned to one another using passive alignment. The jig stencil includes openings for the optical components and have an edge with a retractable portion that urge the optical components into position. The optical components are fixed in position by soldering, and the retractable portions allow for the jig stencil to move relative to the fixed components to avoid misalignment of the OSA components during cooling. The MEMS is then adjusted to maximize optical power directed from a light source, through the optical components, and into an optical transmission medium.

Abstract: A method for making an optical structure and a multilayer optical structure provided with optical guide elements for transmitting at least a light wave, comprises: providing a substrate with a first and second layer; etching out in the second electrically conducting layer a groove having two opposite ends and partly enclosing a first zone of the layer; filling the groove with electrically insulating material; etching out a cavity in the second layer then in the first non-electrically conducting layer partly enclosing a second zone of the second layer, adjacent to or extending the first zone wherein emerges the groove; the cavity comprises a clearance in the second layer; such that the closed part of the second layer corresponding to the zones is electrically isolated from the rest of the layer and the cleared part beneath the second zone constitutes a beam.

Abstract: A moving fiber optical switch of the type having two opposed supports carrying optical fibers with a gap between the fiber ends, with at least one of the supports being flexibly mounted for pivotal movement relative to the other support, and in which: (1) an actuator means, which provides pivotal movement of one or both supports between two orientations corresponding to first and second relative positions of the fiber supports, is connected to a connecting member or housing by means of a flexure; (2) the switch has means for adjusting the length of the gap between the fiber ends; and (3) the switch has means for adjusting the alignment of the optical fiber ends in a direction perpendicular to the movement provided by the pivotal movement of the flexibly mounted support or supports.

Abstract: A 1×N or N×1 optical switch based on a plurality of movable MEMS-created platforms, each carrying a light guiding structure such as a waveguide, where the position of the platforms determines which optical path is connected through the optical switch. The MEMS-created platforms are formed integral with the substrate of the optical switch. The waveguides residing on the movable platforms gradually change the direction of the optical signal in order to minimize losses. The movable platforms can move linearly or rotationally, for example. Also described is a method for fabricating such an optical switch and its components by etching from the bottom of the substrate and through the oxide.

Abstract: An embodiment described herein provides a technique to determine a focus point of a lense. Light is directed from a light source through the lense and onto a target surface. The light source and target surface may be positioned on opposite sides of the lense. The target surface may correspond to the position of where a primary light source for the particular application is to be located. A reflection passing through the lense from the reflective target surface may be located. A determination is then made as to whether the position where the reflection was located also could also corresponds to a focus point for the lense, if the primary light source was to be located at or near the target surface.

Abstract: At V-shaped grooves 112a and 112b on a substrate 110, an optical fiber 150 and lens elements 130a and 130b each having a fitting portion with an external diameter substantially equal to the external diameter of the optical fiber 150 are positioned and mounted. A wavelength branching filter 140 is disposed in a concave groove 114 formed on the substrate 110, and a PD 160 is set at the upper surface of the wavelength branching filter 140. An LD 120 and the optical fiber 150 are optically coupled via the lens elements 130a and 130b. Light with wavelength lambda 1 emitted from the LD 120 is transmitted through the wavelength branching filter 140 and enters the optical fiber 150. Light with wavelength lambda 2 emitted from the optical fiber 150 is deflected at the wavelength branching filter 140 and enters the PD 160.

Abstract: An optical subassembly includes a substrate, a group of solder features on the substrate, a die on the substrate, and a cap on the substrate and over the die. The cap includes (1) a lens over the die and (2) an inner or outer surface that snap-fits to the solder features.

Abstract: This invention relates to an alignment apparatus for aligning a planar optical wave-guide element and an optical fiber block wherein alignment can be completed with more precision and less expense than conventional methods. The alignment apparatus comprising a lower plate; a sliding table mounted on the lower plate capable of horizontal displacement on the lower plate; an upper plate mounted to the sliding table; and, a jig disposed on the upper plate and fixed to rotational means and capable of rotation about the upper plate for holding the optical fiber block.

Abstract: A first waveguide holding member has a first transverse surface region and a first optical waveguide having an end terminating at the first transverse surface region. A second waveguide holding member has a second transverse surface region which confronts the first transverse surface region of the first waveguide holding member and a second optical waveguide having an end terminating at the second transverse surface region. A guide member is operatively coupled to the first and second waveguide holding members and guides the first waveguide holding member in a transverse direction relative to the second waveguide holding member so as to selectively optically couple and decouple the ends of the first and second optical waveguides.

Abstract: The invention provides an apparatus for guiding at least one fiber optic ribbons into a ferule. The ferrule has front and rear faces, a longitudinal axis and at least one guide pin channel disposed parallel to the longitudinal axis. The apparatus comprises: (a) a cover; and (b) a base having first and second surfaces and comprising (i) a channel spanning from the first to the second surface, the channel being defined by a Cartesian coordinate system x, y, and z and having an x-dimension that coincides with the width of the fiber optic ribbon, and (ii) means for aligning said apparatus with said ferrule. When the cover is disposed on the base, a pocket is formed between the cover and the base. The height of the pocket coincides with the cumulative thickness of the number of fiber optic ribbons used.

Abstract: A method and apparatus is provided for attaching a bulk element processing an optical beam to a PLC and optically aligning the bulk element with an optical element formed on the PLC. The method begins by securing the bulk element to a first side of a substrate. A first side of a flexure element is secured to the first side of the substrate. A second side of the flexure element is secured to a first side of the PLC on which the optical element is formed such that the bulk element and the optical element are in optical alignment to within a first level of tolerance. Subsequent to the step of securing the second side of the flexure element, a force is exerted on at least a second side of the substrate to thereby flex the flexure element. The force causes sufficient flexure of the flexure element to optically align the bulk element and optical element to within a second level of tolerance that is more stringent than the first level of tolerance.

Abstract: Light emitted from a light source module and introduced to an optical fiber is detected with a photodetector. An amplification unit amplifies an output from the photodetector. Using a piezoactuator, the light source module is subjected to reciprocal scanning by repeating one-dimensionally in the X axis direction. In this way, one-dimensional optical intensity distribution in the X-axis direction is obtained based on an output of an amplification unit obtained in accordance with the reciprocal scanning. Based on the one-dimensional optical intensity distribution in the X-axis direction, relative positions between the light source module and the optical fiber are adjusted.

Abstract: A method for attenuating an optical beam is provided, and in one embodiment, a communication beam and associated alignment beam are generated by a beam generating element. The alignment beam may later be sampled by a sensor that can provide a relative location of the alignment beam with respect to the sensor. The communication beam may then be positioned so that a desired percentage of the communication beam enters an output fiber. Information, such as alignment beam offset, may be used to position the communication beam. In another embodiment, optical beam attenuation may be provided by using one or more reflecting devices, such as a MEMS device. In this configuration, a MEMS device may position a focused communication beam in such a manner that a desired percentage of the communication beam enters an output fiber.

Abstract: A tubular body having a substantially rectangular cross-section is formed with a plurality of flat plates each having a surface with a light reflecting coating applied thereto. To form the tubular body, the flat plates are disposed in such a manner that the surfaces having the light reflecting coating applied thereto face inward and that an end surface of one of the flat plates at one end is held in contact with the surface of another flat plate. The flat plates are bonded by bonding the end portions thereof with each other on the outer side surfaces of a tubular body so as to form an optical rod.

Abstract: The invention relates to an optical, integrated alignment device for accurately aligning and efficiently coupling energy between in-plane optical devices. A semiconductor substrate is etched to include a groove for an optical fiber and a lens for passing an optical signal from a cut fiber to a photodetector. The etched semiconductor substrate may be used to pass an optical signal from a surface light emitting device to a cut fiber. The end of the optical fiber is cut at a slant that redirects an optical signal from the fiber through the lens or vice-versa. The lens focuses the optical signal onto a target.

Abstract: An integrated optical transducer assembly includes a substrate and an optoelectronic array attached to the substrate. The optoelectronic array further includes a plurality of individual subunits bonded together to form a single array, with each of the subunits including a defined number of individual optoelectronic elements associated therewith. The elastomeric material maintains an original alignment between the plurality of subunits.

Abstract: A method for making a transmitter optical subassembly (TOSA) is provided. In the method, an alignment in the Z-direction between a fiber stub array (FSA) and a VCSEL array is performed first. Then, an alignment in the X-Y direction is performed. A rough prealignment in the X-Y direction may also be performed prior to the alignment in Z-direction. A vertical cavity surface emitting laser (VCSEL) array may be hermetically sealed using a lens assembly or by using a separate lid assembly. The hermetic sealing and attaching of different components may be achieved by laser welding and/or soldering or any other suitable method.

Abstract: The choice for the optical coupling device of a holder that has only one support makes it possible to keep this optical component compact. This is advantageously achieved in that according to the invention the support surrounds the extensible element. The carrier of the optical waveguide thus remains in the immediate environment of the support and the point at which the optical coupling device is to be attached to the optical component. The alignment of the end of the optical waveguide is thus not impaired by unavoidable curvatures of the optical component. The configuration according to the invention of the support of an alternative optical coupling device with a movable arm as an additional connection to the hinge-like web at one end of the carrier of the optical waveguide makes it possible to achieve even more precise alignment of the end of the optical waveguide.

Abstract: Optical components may be precisely positioned in three dimensions with respect to one another. A bonder which has the ability to precisely position the components in two dimensions can be utilized. The components may be equipped with contacts at different heights so that as the components come together in a third dimension, their relative positions can be sensed. This information may be fed back to the bonder to control the precise alignment in the third dimension.

Abstract: An optical device includes a fixed reference. A first optical module has a first optical component prealigned with respect to a reference feature, the first optical module is subsequently mounted to a first predetermined location on the fixed reference. A second optical module has second optical component prealigned with respect to a reference feature, the second optical module mounted to a second predetermined location on the fixed reference.

Abstract: An optoelectronic device is provided having an active alignment. The lens and the optoelectronic device are mounted on their respective carrying members, and the carrying members are placed proximate to each other in a loose alignment controlled by alignment pins loosely engaging oversized alignment opening. An alignment range is created by a difference in the diameter of the alignment pins and the alignment opening, allowing the lens and optoelectronic device to be moved with respect to each other and actively aligned. The member carrying the lens may also include a connector stop cooperatively arranged with the alignment pins to provide an aligned coupling between an optical fiber connector and the optoelectronic component.

Abstract: An alignment system that uses a single optical sensor to enable the end of an optical fiber to be aligned with the input of an optical waveguide of an optical device. In accordance with the present invention, it has been determined that the output of a single optical sensor can be processed and converted into digital signals, which are then further processed in accordance with an alignment algorithm to generate feedback signals that enable precise alignment to be achieved. The alignment system includes the single optical sensor, a lens and processing logic.

Abstract: A coupling structure for coupling an optical waveguide and an optical device is provided. The coupling structure enables to precisely align the optical waveguide and the optical device so that an optical-alignment error can be reduced within a range of a few ?m. The coupling structure includes a first substrate, at least one optical waveguide formed on the first substrate to transmit an optical signal, optical alignment dummy waveguides symmetrically aligned on the first substrate about the optical waveguide, a second substrate bonded to the first substrate, at least one optical device mounted on a bottom surface of the second substrate and optically connected to the optical waveguide, and optical-alignment patterns formed at the bottom surface of the second substrate corresponding to the optical alignment dummy waveguides, wherein an optical alignment for the optical waveguide and the optical device is achieved by aligning the optical alignment dummy waveguides with the optical-alignment patterns.

Abstract: The low-profile back plane interconnection device includes a back plane, a daughter card, and a shroud. The back plane includes an optical fiber. The optical fiber of the back plane includes a terminal end. The terminal end of the optical fiber of the back plane has a terminal surface that is oriented at an angle relative to the longitudinal length direction of the optical fiber of the back plane. The shroud is mounted to the daughter card. The shroud includes an optical fiber, and a lens. The optical fiber of the shroud has a terminal end. The terminal end of the optical fiber of the shroud is in optical communication with the terminal end of the optical fiber of the back plane via the lens.

Abstract: An optical apparatus (110) includes a base member (121) with a plurality of grooves (181-187, 191-197), and includes a respective lens (11-17) fixedly mounted in each groove. Optical filters (31-35) are mounted on the support member in predetermined locations. One such lens is fixedly secured to an input optical fiber (21), and the input fiber is used to introduce radiation into the apparatus. Several output optical fibers (22-27) are successively positioned in relation to respective lenses by a fiber positioner (302), which monitors the amount of radiation passing through the fiber being positioned, and then causes a laser (303) to fuse the fiber end to the associated lens in a selected position.