Abstract: The present invention relates to optical components for reversing and inverting images, and to methods of manufacturing them accurately, robustly and cost-effectively. The method includes optical contact bonding a first optical element and a second optical element and adhesively bonding the first optical element and the second optical element. Adhesively bonding might include forming a notch into the second optical element and depositing a bead of adhesive into the notch, such that the adhesive adheres to both the notch and the first optical element.

Abstract: A hollow core multi-mode interference (MMI) device is described that comprises a multi-mode waveguide (10, 14) optically coupled to at least two fundamental mode waveguides (8, 12, 16). The device is characterised in that it comprises a means for varying the internal cross-sectional dimensions of a portion of one or more of said at least two fundamental mode waveguides. In particular, the side wall of a fundamental mode waveguide having a substantially square cross-section can be moved using micro-electro mechanical systems (MEMS). Various optical routing devices incorporating such MMI devices are described.

Abstract: A voltage is applied on a first branch 3a by a first ground electrode 10 and a signal electrode 11, and a voltage is applied on a second branch 3b by a second ground electrode 12A and the signal electrode 11. A first gap 13 is formed between the first ground electrode 10 and the signal electrode 11, and a second gap 14 is formed between the second ground electrode 12A and the signal electrode 11. The first gap 13 and the second gap 14 are divided into voltage applying portions 13a, 14a, feed-through portions and connection portions 13b, 14b therebetween, respectively, and satisfy the formula: G12/G11?G22/G21<G32/G31.

Abstract: The present disclosure relates to a telecommunications cable including a distribution cable and a tether that branches from the distribution cable at a mid-span breakout location. A flexible closure covers the mid-span breakout location. Within the closure, fibers are broken out from the distribution cable and spliced to fibers of the tether. The lengths of broken out fibers within the flexible closure are provided with sufficient excess fiber length to allow the closure to be readily bent/flexed in any direction without damaging the fibers.

Abstract: An apparatus is provided that includes a substrate having a top surface, at least one optical data transport medium coupled to the substrate, one or more lens devices coupled to the substrate, and one or more reflective devices coupled to the substrate. The one or more lens devices and the one or more reflective devices are at least partially passively aligned with the at least one optical transport medium by use of one or more pins.

Abstract: Various embodiment comprise silicon-on-insulator waveguide designs that simultaneously achieve both high optical confinement, low-loss, and provide for electrical connections. In certain embodiments, high index contrast waveguides comprise a central elongate waveguide portion and a segmented portion comprising a single thin layer of Silicon-On-Insulator that achieves both high optical confinement and minimal insertion loss. Other devices, such as chemical and biological sensors, and optical elements may also be fabricated.

Abstract: The invention relates to an optically pumped multilayered modulator having surface-normal geometry. The multilayer structure comprises an absorber section through which an optical signal (401) to be modulated is coupled from an input (401) to an output (400). The multilayer structure further comprises control means for supplying a control signal for controlling the transmission characteristics of the absorber section. The control signal is generated by an in-plane waveguide-type laser integrated monolithically with the saturable absorption region. The in-plane control laser includes waveguide regions (405) and multiple-quantum-well layers (409) used as a gain medium. The laser beam is adapted to travel through the absorber section in order to modulate the transmission characteristics of the absorber section.

Abstract: The present invention provides a dielectric optical fiber cable which is capable of being remotely detected while buried. Specifically, this invention incorporates a detectable and easily removable locating element which is attached to the optical fiber cable by a web defined by the jacket extending over both the optical fiber cable and the locating element. The web allows for the locating strand to be easily removed once separation of the locating element from the optical fiber cable is initiated. The web is designed to allow the initial tear to propagate into a precise longitudinal tear along a predetermined length of the optical fiber cable.

Abstract: New fiber lasers, spontaneous emission sources, and optical fiber amplifiers are provided. Their conventional counterparts, which have a fiber doped with thulium (Tm) ions and excited by 0.67 ?m or 0.8 ?m pumping light, have a problem in that their characteristics are deteriorated with the elapse of time. The new fiber lasers, spontaneous emission sources, and optical fiber amplifiers use 1.2 ?m light as pumping light. Alternatively, they use a pumping source for exciting the thulium from the lowest energy level 3H6 to 3H5 excitation level. As a more preferable configuration, they improve the emission efficiency at 2.3 ?m band by disclosing Tm-doped host glass.

Abstract: An image display comprises an image display device for generating a viewable image; and an optical angular selector (290) for selecting an angular range of light to form the viewable image, the optical angular selector having an array of substantially parallel light transmission guides (260) each comprising a light-guiding region (270) to promote propagation of light incident upon the light-guiding region within a range of angles of incidence by refraction and/or total internal reflection and an absorbing material (310) peripherally arranged with respect to the light-guiding region to absorb light incident upon the light-guiding region outside the range of angles of incidence.

Abstract: A splice tray arrangement including a tray and a splice chip arrangement. The splice chip arrangement including stackable splice chips defining channels for holding splice elements. Each of the splice chips including a mounting arrangement for mounting the splice chip at a mounting location on the tray, and a stacking arrangement for mounting the splice chip upon another splice chip.

Abstract: A waveguide PIN photodiode is provided. The waveguide PIN photodiode includes a lower light guide layer, a light absorption layer, an upper light guide layer, and a cladding layer. The lower light guide is formed on a substrate, and the light absorption layer is formed on the lower light guide layer. The upper light guide layer is formed on the light absorption layer, and the cladding layer is formed on the upper light guide layer. The lower light guide layer, the light absorption layer, and the upper light guide layer constitute a core layer, which is an optical waveguide, and graded index distribution is symmetrically formed in a depth direction, centering around the light absorption layer having a highest refractive index.

Abstract: A light controlling means includes a shutter member and an actuator. The shutter member is disposed in a slit and has a function to shut off signal light propagated in the light path of an optical fiber array. The actuator is constructed to drive and move the shutter member in a vertical direction. The shutter member is fixed to one end of the actuator and positioned substantially in alignment with an inclination angle of the slit. Further, a base member of the shutter member is made from transparent quartz glass. A light reflecting film is formed on a portion of one of the plate surfaces of the shutter member, on a surface opposite the optical axis of a light exit portion.

Abstract: At least one exemplary embodiment is directed to a method for manufacturing a three-dimensional photonic crystal including a plurality of stacked layers having periodic structures where the thickness of the periodic structures in a layer are adjusted such that the layer satisfies the following equation: neff1×H1×M=neff×H wherein H1 represents the actual thickness of the layer, neff1 represents the actual refractive index of the periodic refractive index structure, H represents the design thickness of the layer, neff represents the design effective refractive index of the periodic refractive index structure, and M represents a coefficient inclusive and between 0.5 and 2.0.

Abstract: An optical coupler converts a light distribution from a light source into a small angle distribution that extends over a volume larger than the variations in the alignment of an optical fiber. In one embodiment, a diffractive or hybrid diffractive/refractive bifocal lens forms first and second images of the light source respectively in first and second image planes. An input face of the optical fiber is between the first and second image planes and receives light diverging from the first image plane and light converging toward the second image plane. The net optical power coupling into the fiber is uniform over a large range of fiber positions and provides the optical coupler with a relaxed tolerance for misalignment of the fiber or the light source. The relaxed alignment tolerance facilitates low cost manufacture of multi-channel optical transmitters using single-mode optical fibers.

Abstract: An optical transducer 100, 200 and method for the simultaneous measurement of downhole pressure and temperature in a single- or multi-point configuration including a body 10a/10b with an elastic membrane 50 onto which at least one Bragg grating 60a/60b is attached, and at least an additional Bragg grating 60b/60a contained on the same optical fiber 30. The elastic membrane 50 conveys strain proportional to the pressure and temperature conditions to which is submitted said transducer to at least one Bragg grating 60a/60b, the portion of light not reflected by the Bragg gratings 60a, 60b continues along the remaining of the optical fiber 30.

Abstract: A of fabricating a partially flexible optical fiber bundle includes forming plural helical fiber ribbons, each helical ribbon being formed by winding a fiber about a mandrel and adjacently fusing a first selected set of fiber portions within each ribbon to define and ends region. The ends regions of multiple fiber helixes are stacked and bonded to form a fiber bundle with and ends section. The ends section is cut through to yield opposed input and output ends of the fiber bundle. Intermediate rigid sections are formed along the length of the bundle by various alternative methods of adjacently bonding selected portions of the constituent ribbon and bundle fibers.

Abstract: A signal conditioner to measure the length of an interferometric gap in a Fabry-Perot sensor (interferometer). The invention includes a light source, a Fabry-Perot interferometer capable of spanning a range of gaps in response to physical changes in the environment, a second interferometer that is placed in series with the Fabry-Perot interferometer which does not filter any particular wavelengths of light but acts as an optical cross-correlator, a detector for converting the correlated light signal into electronic signals, and an electronic processor which controls system elements and generates a signal indicative of the length of the gap spanned by the Fabry-Perot sensor.

Abstract: According to embodiments of the present invention, an optical device includes a ridge waveguide having the ridge oriented on the waveguide core layer at an angle away from the <110> direction of the (100) plane of (100) Indium Phosphide substrate. The ridge waveguide may be a laser diode, a Mach-Zehnder modulator, or other suitable optical device.

Abstract: Optical modules and methods for making optical modules are described. In one embodiment, an optical module includes a substrate assembly including a photonic chip mounting region, and a groove extending towards the photonic chip mounting region. A waveguide is disposed within the groove. A plurality of spacers is on the chip mounting region, each spacer having a predetermined height. A photonic chip is placed on the plurality of spacers and above the chip mounting region, and an optical coupler is between the photonic chip and the waveguide.