Abstract: The invention relates to a device for fiber optic temperature measurement with an optical fiber having a radiation coupling in area and a detector-associated radiation coupling out area. Such a device is characterized in that the optical fiber is constructed with high transmission in the infrared (IR) spectral range, particularly in the range from approximately 2 ?m to approximately 20 ?m.

Abstract: In a one-fiber bidirectional optical transmission system in which output optical signals of optical transmitter-receivers respectively connected to the opposite ends of one optical fiber transmission line are bidirectionally transmitted in the optical fiber transmission line, which utilizes a Raman amplification effect by backward pumping, a frequency satisfying the conditions of |fs1?f0|?|fp2?f0| and |fs2?f0|?|fp1?f0| is selected, where f0 is a zero dispersion frequency of the optical fiber transmission line, fs1 and fs2 are the frequencies of the first signal and the second signal, respectively, and fp1 and fp2 are frequencies of the first Raman pump light and the second Raman pump light, respectively.

Abstract: An optical transmission device includes a planar waveguide for transmitting an optical signal, a light emitting unit for inputting a light beam in the planar waveguide, and a setting unit for setting a propagation angle of a light beam transmitted in the planar waveguide. A plurality of light beams with different propagation angles are transmitted in the planar waveguide.

Abstract: An optical micro-electro-mechanical system (MEMS) switch is disclosed. In a preferred embodiment the optical MEMS switch is used as an M×N optical signal switching system. The optical MEMS switch comprises a plurality of optical waveguides formed on a shuttle for switching optical states wherein the state of the optical switch is changed by a system of drive and latch actuators. The optical MEMS switch utilizes a latching mechanism in association with a thermal drive actuator for aligning the waveguide shuttle. In use the optical MEMS switch may be integrated with other optical components to form planar light circuits (PLCs). When switches and PLCs are integrated together on a silicon chip, compact higher functionality devices, such as Reconfigurable Optical Add-Drop Multiplexers (ROADMs), may be fabricated.

Abstract: A light intercepting device includes a movable portion allowed to swing about a support portion as a torsional axis, a shielding portion provided at an end portion of the movable portion in a direction perpendicular to the torsional axis, a driving wiring provided on the movable portion, and a magnetic field generator to apply a magnetic field to at least a part of the driving wiring in a direction perpendicular to the driving wiring. A position of the shielding portion is changed by power supply control for the driving wiring to control transmission and interception of space light.

Abstract: A monolithic optical coupling module for coupling a light beam is disclosed. The optical coupling module has a light beam input portion, a light beam output portion and at least one integrally formed light beam attenuator between the light beam input portion and the light beam output portion. The monolithic optical coupling module may be unitarily fabricated of a moldable polymeric material. The light beam attenuator may be a roughened surface or a roughened internal portion. A method for forming the monolithic optical coupling module is also disclosed.

Abstract: A re-generator of an optical clock signal has at least a mode-locked semiconductor laser outputting a re-generated optical clock signal from at least one end face of the mode-locked semiconductor laser, with inputted light signals having different polarized wave states respectively at both end faces of the mode-locked semiconductor laser; wherein the re-generator has a light splitter to split the light signal into two kinds of elements with respective polarized waves different by a right angle, and to emit one of the elements split from the light signal, to one of both end faces of the mode-locked semiconductor laser; and a rotator to input the other elements split from the light signal, to rotate the other elements by a right angle, and to lead the rotated element to the other end face of the mode-locked semiconductor laser.

Abstract: An optical micro-electro-mechanical system (MEMS) switch is disclosed. In a preferred embodiment the optical MEMS switch is used as an M×N optical signal switching system. The optical MEMS switch comprises a plurality of optical waveguides formed on a cantilever beam platform for switching optical states wherein the state of the optical switch is changed by a system of drive and latch actuators. The optical MEMS device utilizes a latching mechanism in association with a thermal drive actuator for aligning the cantilever beam platform. In use the optical MEMS device may be integrated with other optical components to form planar light circuits (PLCs). When switches and PLCs are integrated together on a silicon chip, compact higher functionality devices, such as Reconfigurable Optical Add-Drop Multiplexers (ROADMs), may be fabricated.

Abstract: An optocasule unit for an optohybrid assembly (10), said capsule unit comprising a lower casing part (36) and a compatible upper cover part (54) which together form, at one end (50) thereof, an integral receptacle section for obtaining an optomechanical interface and receiving and detachably holding therein an optical connector with at least one external optical fiber. A central section (38) of the lower casing part (36) has a cavity (42) for receiving, in a form-closed manner, a ferrule (12) of the optohybrid assembly (10). The lower casing part (36) has, at a second end thereof, a base plate (44) for supporting a substrate (20) having at least one optochip (26, 28) and a proximal end of at least one primary optical fiber (22, 24) mounted thereon. The cover part (54) also has a section (58) covering the substrate (20) and at least a portion of the base plate (44) of the lower part.

Abstract: A waveguide-semiconductor coupling device includes a waveguide structure that includes a multimode interferometer (MMI) structure so as to minimize the reflections of TE modes in the coupling device. A mesa structure is coupled to the waveguide structure so as to minimize the reflections of TM modes in the coupling device.

Abstract: A high density panel mounting assembly has a first connector housing having first and second arrays of channels for receiving modified connectors, separated by a shelf. An adapter assembly for receiving the ferrules of the connectors has an interior wall having first and second arrays of bored projections forming sleeves for receiving the connector ferrules. The adapter assembly has a second connector housing substantially identical with the first connector housing mounted to or integral with the rear of the adapter housing for receiving individual connectors. Each of the connector housings has an array of apertures along the top and bottom surfaces for latching the connectors in place. Each of the connectors has a resilient latching arm having a distal end having a latching surface thereon which bears against the end of its corresponding aperture to latch the connector in place within the connector housing.

Abstract: An optical switch has at least first, second, and third optical fibers disposed generally parallel to each other and spaced at non-equal intervals in a direction substantially perpendicular to an optical axis of each of the optical fibers. The optical fibers have tip portions disposed approximately along a straight line extending in a direction substantially perpendicular to the optical axis of each of the optical fibers. A first non-movable guiding structure guides a beam of light emitted from the first optical fiber to the second optical fiber along a first optical path disposed between the tip portion of the first optical fiber and the tip portion of the second optical fiber.

Abstract: An optical switch 1 has a plane waveguide 2 provided with optical waveguide 3, and an actuator structure 5 including a beamlike member 6 supported in a doubly supported manner on the plane waveguide 2. A mirror 10 for shutting out light passing on the optical waveguide 3 is provided in the central region of the beamlike member 6. Interconnecting members 12 extending in the longitudinal direction of the beamlike member 6 are coupled to the both ends of the beamlike member 6. The interconnecting members 12 preliminarily exert a compressive force on the beamlike member 6 so as to deflect the beamlike member 6 with compression stress in an initial state in which the mirror 10 is located at a position where the mirror allows the light passing on the optical waveguide 3 to pass or at a position where the mirror shuts out the light passing on the optical waveguide 3.

Abstract: The invention relates to modular heat-dissipating housing covers for opto-electronic modules, e.g. transceivers. The housing covers according to the present invention are constructed out of various different parts, which provide different levels of heat dissipation depending on the desired implementation, while maintaining a seal against EMI leakage. Extra heat sinking portions are provided to dissipate heat generated from specific heat generating sources. The extra heat sinking portions are configured into a shape and/or out of a material that provides more thermal dissipation than the standard cover provided. Independent control over the different heat sinking portions enables a better fit and appropriate dissipation.

Abstract: Covered optical fibers are provided comprising at least on optical fiber; and a buffer tube covering surrounding the optical fiber. The buffer tube covering is comprised of a blend of at least 40% by weight of a copolyether ester elastomer, at least 10% by weight of a rubbery modifier, and at least 10% by weight of an amorphous thermoplastic polymer, and has a melting point of at least 165° C. and a Trouser Tear Strength of less than 65 N/mm.

Abstract: A kit and a method for splicing together porous sleeves are disclosed. The kit includes a release liner in the form of a non-porous membrane, preferably in the shape of an elongated tube. Adhesive and an adhesive applicator may also be included. The method includes the steps of inserting the release liner within an end of a first sleeve and then inserting that sleeve end into the end of a second sleeve. The outer surface of the first sleeve engages the inner surface of the second sleeve and defines an engagement zone having a predetermined length. The release liner extends along the engagement zone. Adhesive is applied to the outer surface of the second sleeve. The adhesive penetrates the second sleeve and bonds it to the first sleeve. The release liner acts as a barrier preventing the adhesive from bonding the first sleeve closed at the splice.

Abstract: A method for manufacturing an article capable of constraining a propagating wave is disclosed. The method includes contacting a crystalline substrate with a source of deuterium ions to create a region in the crystalline substrate having a crystal structure that includes deuterium ions. The region is capable of constraining a propagating wave to the region.

Abstract: High index-contrast fiber waveguides, materials for forming high index-contrast fiber waveguides, and applications of high index-contrast fiber waveguides are disclosed.

Abstract: The present invention provides a configuration where all optical parts of a monitoring system are contained within a seal and within the generator itself. Non-optical preamplifier functions may also be placed within the seal. In this configuration there is an electrical rather than optical feed-through at the generator wall, which is hermetically sealed, unlike a fiber optic feed-through. The fiber optic light source and detector for each sensor is located in the seal on the generator side of the hermetic electrical feed-through. Electrical power and the sensor's converted electrical vibration signals pass through the electrical feed-through to preamplifier circuitry on the outside of the seal where direct electrical connection is then made to a main chassis unit.

Abstract: An optical fiber has three or four core slices including one or more buried slices and a raised central slice. The buried slice or each of the buried slices is very deeply buried. The fiber has a zero dispersion wavelength of less than 1 460 nm. It has a chromatic dispersion in the vicinity of 5 ps/nm.km and a dispersion slope in the vicinity of 0.03 ps/nm2.km at a wavelength of 1 550 nm.