Abstract: An optical fiber ribbon comprising a plurality of optical fibers secured or embedded substantially parallel to one another, fibers are selected and processed such that the skew in optical propagation time for signals transmitted over said plurality of optical fibers is minimized. The optical fibers are selected from the same pull and each of said optical fibers has a modal bandwidth greater than or equal to 800 Mhz.km at an operating wavelength of 1300 nm. The invention extends the practical applications of optical fiber ribbons to include synchronous parallel transmission with an aggregate data-rate.times.distance product of greater than 10 Gbit/sec.km.

Abstract: A passively aligned high performance optoelectronic package in pigtail form which has a reduced cost over the conventional techniques of packaging by virtue of materials and alignment techniques is disclosed. The package of the present disclosure has a ferrule made of material which substantially matches the thermal characteristics of the optical bench, with the ferrule having a flat portion on one end for securing an optical fiber on a receiving group of the optical bench. The material of the ferrule is preferably kovar. Finally, passive alignment of the optoelectronic device to the fiber is effected by way of the ferrule with the flat portion of the ferrule being partially disposed in a second ferrule or sleeve prior to commitment of the sub-assembly into the final package.

Abstract: A fiber distribution frame includes a support structure having a plurality of connector module assemblies mounted in first and second vertical arrays on opposite sides of the support structure. Assemblies of each of the arrays are spaced from one another in a vertical spacing to define a plurality of troughs between each of the assemblies with a plurality of troughs extending rearwardly into rear troughs. A central trough is provided for taking up an excess of fiber extending between the plurality of connector assemblies.

Abstract: A system (10) for conjugating electromagnetic energy beams adapted for use with UV, visible and infrared beams (24), and beams (24) that are depolarized or partially polarized. The inventive system (10) includes an SBS-active medium (20) and an asymmetric waveguide (27) whose guiding medium is an SBS-active medium (20). The asymmetric waveguide (27) has different propagation constants for different modes in the beam and this difference is sufficient for dispersing the modes over the length of SBS gain, thus eliminating cross-scattering between the different modes. The asymmetric waveguide (27) allows all the modes to interfere with each other locally, creating local hot spots that favor correct phases between the polarizations of a back-scattered beam (30). The inventive system (10) has focusing optics (12) for focusing the beams (24) into the SBS-active medium (20) inside the asymmetric waveguide (27) at an angle (22) with respect to an axis (18) of the waveguide (27).

Abstract: An electrically-pumped short wavelength vertical cavity surface emitting laser (VCSEL) is optically coupled to a long wavelength VCSEL for optically pumping the long wavelength VCSEL. The long wavelength VCSEL has a long wavelength active-absorber medium interposed between a top long wavelength mirror and a bottom long wavelength mirror. The long wavelength VCSEL emits radiation at a first wavelength in a range from 1250 nm to 1650 nm. The short wavelength VCSEL emits radiation at a second wavelength in a range from 700 nm to 1050 nm.

Abstract: An optical fibre organizer having a plurality of substantially mutually adjacent inlet ports and a plurality of mutually separated outlet ports, and means connecting the inlet ports and the outlet ports such that a fibre inserted into each inlet port will emerge from a pre-determined outlet port.

Abstract: An optical fiber pressure sensor for measuring a pressure on the basis of an optical power loss depending on a configuration change of an optical fiber comprising a luminescence device optically connected with at least an optical fiber which is constructed with a main part for propagating a light protective coating member for protecting the main part. A light intercepting device detects a light passing through the optical reflected light from the optical fiber. A bending device bends at least a part of the optical fiber according to a measured pressure. The optical fiber pressure sensor is characterized by being used when a normalization frequency V value of the optical fiber is smaller than 90% of a normalization cut-off frequency defining a single transmission mode condition of the optical fiber.

Abstract: A laser connector and electronic security system for a laser delivery system controls connection of the delivery system to a source of laser energy for medical procedures by storing encrypting codes to allow access by authorized, unused, delivery assemblies. The connector is specially dimensioned to further control delivery system access to the source, and the electronic security system utilizes EEPROM memory to allow storage and accumulation of information about the laser parameters used in the medical procedure. The connector and electronic security system is particularly suitable for pulsed laser transmyocardial revascularization (TMR) procedures and enables automatic power level calibration in accordance with the connected delivery system specifications, maximum time of usage settings, storage of the number/power level of the pulses delivered, and storage of the total number of TMR channels created.

Abstract: HDI fabrication techniques are employed to form a variety of optical waveguide structures in polymer materials. Adaptive optical connections are formed, taking into account the actual position and orientation of devices which may deviate from the ideal. Structures include solid light-conducting structures, hollow light-conducting structures which are also suitable for conducting cooling fluid, and optical switching devices employing liquid crystal material. A "shrink back" method may be used to form a tunnel in polymer material which is then filled with an uncured polymer material that shrinks upon curing.

Abstract: An optical isolator system and method improving the manufacturability of the system, including fabricating a unitary tubular optical isolator system in two parts which are soldered together. The tubular system includes an internal disk to protect the isolator from heated solder during joinder of containment portions. The optical isolator system includes tubes to space polarizer, analyzer, and isolator portions.

Abstract: A device and method are provided to relieve strain in a plurality of optical ribbon fibers. In one embodiment, a tray has two sidewalls defining a passageway therebetween for receiving a grommet. The grommet defines a channel sized for receiving therethrough the plurality of optical ribbon fibers in a stacked arrangement. A compression clip fits over the grommet to compress the grommet proximal the channel the compress the optical ribbon fibers against each other in the stack.

Abstract: A semiconductor light emitting device has a double heterostructure. The device is composed of an active layer and clad layers that sandwich the active layer. At least one of the clad layers has a multilayer structure having at least two element layers. The Al mole fraction of an element layer, which is proximal to the active layer, of the multilayer structure is smaller than that of the other element layer thereof distal from the active layer. This arrangement improves the crystal quality of an interface between the active layer and the clad layer of multilayer structure and effectively confines carriers in the active layer.

Abstract: An improved light emitting device is provided.

Abstract: A composite optical fiber including a first optical fiber having a first core with a first diameter being optically fused to a second optical fiber having a second core with a second diameter that is smaller than the first diameter. The first optical fiber has an output end with a tapered end section. The first core tapers down in diameter in the tapered end section from the first diameter and terminates at the output end with a third diameter that is smaller than the first diameter and substantially equal to or smaller than the second diameter. The second fiber has an input end that is optically fused to the output end of the first fiber. The composite optical fiber of the present invention is formed by heating the output end of the first optical fiber, and then pulling the output end of the first optical fiber to form the tapered end section. The output end of the first optical fiber is then optically fused to the input end of the second optical fiber.

Abstract: The present invention is a fiber optic cable connector for providing a low cost connector that provides strain relief to optical fibers without compromising an optical coupling. The cable connector has a connector body that has front and back ends. The front end of the cable body has a pair of latching members extending therefrom and a mounting post that also extends therefrom. The back end of the connector body is tapered to form a cable transition member. A connector body cover is provided to protect optical fibers residing between the connector body and the body cover. A fiber alignment block, or ferrule, is provided that has a fiber receiving surface for receiving at least one optical fiber and a connector body engagement surface and an optical interface surface. A plurality of alignment grooves are formed in the receiving surface for aligning the at least one optical fiber.

Abstract: A gain coupled distributed feedback semiconductor laser includes an active layer and a diffraction grating provided in the vicinity of the active layer and having a plurality of light absorption layers periodically arranged along a resonator length direction. The order of the diffraction grating is one, a duty of the diffraction grating is in the range of about 0.4 to about 0.8, and a thickness of the light absorption layer is in the range of about 6 nm to about 30 nm.

Abstract: An improved aperture is provided. The aperture comprises: at least a first layer; the first layer being oxidized in a laterally oriented first region; the first layer being modified within a laterally oriented second region, the second region being oxidized less than the first region; a second layer disposed in communication with the first layer, the second layer being oxidized less than the first layer; and a non-planar boundary having top and bottom boundary surfaces and side walls connecting the top and bottom boundary surfaces, the top boundary surface defined as a top surface of the second layer above the laterally oriented first region and the bottom boundary surface defined as a bottom surface of the laterally oriented second region, the first and second regions defining the aperture.

Abstract: An optical semiconductor module comprises an optical semiconductor element, an optical fiber, a monocrystalline substrate, an airtight sealing member and a reinforcing plate. Light is transmitted through the optical semiconductor element and the optical fiber. The optical semiconductor element and the optical fiber are mounted on the monocrystalline substrate. The optical semiconductor element is sealed airtight by the airtight sealing member. An optical axis aligning mechanism for aligning the optical axis of the optical semiconductor element with the optical axis of the optical fiber is arranged on the monocrystalline substrate. The reinforcing body is welded with metal on the rear surface of the monocrystalline substrate.

Abstract: A conductive element with a lateral oxidation barrier is provided for the control of lateral oxidation processes in semiconductor devices such as lasers, vertical cavity surface emitting lasers and light emitting diodes. The oxidation barrier is formed through modification of one or more layers which initially were receptive to oxidation. The quality of material directly below the oxidation barrier may be preserved. Related applications include the formation of vertical cavity surface emitting lasers on non-GaAs substrates and on GaAs substrates.

Abstract: A fiber-optic device for sensing the presence of a gas in an environment is provided. The device comprises a light source for directing a light beam to a layer system having a first surface and a second surface opposite the first surface. The first surface is exposable to the light beam and the second surface is exposable to the environment. A first light portion encounters and reflects from the first surface at an angle of incidence free from optical wave guide resonance phenomenon and the second light portion encounters and reflects from the first surface at an angle of incidence enabling an optical wave guide resonance phenomenon. The layer system is selected to reversibly react with the gas to be detected. The reaction between the gas and the material changes the material's optical properties and the wavelength at which the optical wave guide resonance occurs.