Abstract: A fiber optic cable and connector assembly is disclosed. In one aspect, the assembly includes a cable optical fiber, an optical fiber stub and a beam expanding fiber segment optically coupled between the cable optical fiber and the optical fiber stub. The optical fiber stub has a constant mode field diameter along its length and has a larger mode field diameter than the cable optical fiber. In another aspect, a fiber optic cable and connector assembly includes a fiber optic connector mounted at the end of a fiber optic cable. The fiber optic connector includes a ferrule assembly including an expanded beam fiber segment supported within the ferrule. The expanded beam fiber segment can be constructed such that the expanded beam fiber segment is polished first and then cleaved to an exact pitch length. The expanded beam fiber segment can be fusion spliced to a single mode optical fiber at a splice location behind the ferrule.

Abstract: In the present invention, a connector structure comprises a multi-core fiber and a ferrule. The multi-core fiber comprises a plurality of cores and a cladding that surrounds the cores. The ferrule holds the multi-core fiber. A tip of the multi-core fiber protrudes from an end face of the ferrule. A relation ??14.8/a is satisfied. In the formula, ? (?m) is a difference between a maximum protrusion height and a minimum protrusion height from an end face of the ferrule in a reference circle at the tip of the multi-core fiber. The reference circle is a minimum circle that includes all mode field diameters of the plurality of the cores having a center of cross section of the multi-core fiber as its center. And a (?m) is a radius of the reference circle.

Abstract: A Multichannel Fiber Optic Rotary Joint (FORJ) has a Dove prism as a derotating optical element, wherein the Dove prism has a multiwavelength achromatic metasurface coating on the input and output face. Such a Multichannel FORJ has the advantage that its transmission properties include consistently low attenuation over a rotation angle and a high-return loss over a broad wavelength range, e.g. the whole frequency band used for telecommunications. A method for fabricating the same.

Abstract: A method for operating an optical system may include selecting a band gap energy level for an optical waveguide in an electro-optic modulator. The band gap energy level may correspond to a predetermined phase shift efficiency of a waveguide electrode coupled to the optical waveguide. The method may further include generating, across a conductive plane in the electro-optic modulator, a differential voltage that produces a predetermined temperature in a waveguide core of the optical waveguide. The predetermined temperature may correspond to the band gap energy level selected for the optical waveguide. The method may further include transmitting, through the optical waveguide and with a modulating voltage applied by the waveguide electrode, an optical wave to an optical wave combiner. The modulating voltage may produce an amount of phase shift in the optical wave at the predetermined phase shift efficiency.

Abstract: An adapter block assembly includes at least one adapter block; a circuit board; a first contact set; and a second contact set. The contact sets are disposed at apertures defined in the adapter block and rotated 180° from each other. Each adapter block includes first and second latching arrangements that retain separately manufactured alignment arrangements against movement along the passages. The first latching arrangements include latching arms disposed at the apertures. The second latching arms include ramps and stops disposed opposite the apertures. Optical connectors suitable for plugging into the adapter block include an outer housing having an area of increased thickness of hold a storage device and an inner housing with a channel to accommodate the area of increased thickness of the outer housing.

Abstract: A distributed temperature sensor (DTS) system includes a light source; a length of fiber filter having been hydrogen darkened prior to assembly of the system; and a DTS fiber. A method for making a filter for a DTS system.

Abstract: A communication module includes a printed circuit board, a housing including a left and right sidewall, a top and bottom panel, and a catch pin extending from the bottom panel, the housing enclosing the circuit board and configured to be inserted into and removed from the host device, and a delatch assembly slidably engaged with the bottom panel of the housing, including first and second delatch arms extending underneath the bottom panel of the housing and configured to removably engage with the host device, and a delatch cross-member extending underneath the bottom panel of the housing, including a hooking member configured to selectively engage the catch pin as the delatch assembly slides along the housing.

Abstract: There is provided an optical assembly (100) comprising an optical fiber arrangement (220, 230) and a lens arrangement (120). The lens arrangement (120) is spatially disposed relative to the fiber arrangement (220, 230) so as to be capable of providing an axial substantially collimated beam of radiation in response to receiving radiation from the optical fiber arrangement (220, 230) and capable of providing a focused beam of radiation to the optical fiber arrangement (220, 330) in response to receiving substantially collimated radiation to the lens arrangement (120). The assembly (100) further comprises a configuration of elements (110, 130, 200, 260) for spatially disposing the optical fiber arrangement (220, 230) relative to the lens arrangement (120).

Abstract: Apparatus for inserting optical fibers into furcation tubes comprises a plurality duct-like channels each configured to receive one of the furcation tubes in such a way that the furcation tube is insertable from a first side of the apparatus into the duct-like channel so that a long tube section of the furcation tube can be left protruding on the first side and a short tube section of the furcation tube can protrude on an opposite second side of the apparatus. Each duct-like channel is further configured so that a portion of the long tube section becomes spread apart along a longitudinal slot of the furcation tube, thereby allowing an optical fiber to be inserted into the short tube section and extended through the furcation tube before protruding from the longitudinal slot in the long tube section.

Abstract: Wavelength division multiplexing and demultiplexing (WDM) TOSA and ROSA TO-can assemblies are provided that are capable of transmitting and receiving optical data signals, respectively, having more than three wavelengths, that can be packaged in smaller packages than those used for existing BOSAs and tri-OSAs, that can be manufactured without requiring a large amount of plant retooling or capital investment, and that can be made available in the market relatively quickly.

Abstract: An optical fiber attachment device has a slide receptacle having a slide space, and a sliding member provided slidably in the slide space. The sliding member has an installation component where the core wire of an optical fiber is held by a fiber holder, a pressure contact part is provided to the slide face of the slide receptacle in the slide space, and a corresponding pressure contact part is provided to the slide face of the sliding member in the slide space, and when the sliding member has slid in the slide space, the pressing force of the pressure contact part propagates through the corresponding pressure contact part to the sliding member side, and part of the sliding member is pressed from the slide receptacle side toward the installation component on the sliding member side.

Abstract: An optical connector for an endoscope has a first holding member which holds a first waveguide therein, a second holding member which holds a second waveguide therein and replaceable replacement members which intervenes between the first holding member and the second holding member so that replacement waveguides intervenes between the waveguides and is optically coupled to the waveguides. The optical connector has attachment members and a positioning mechanism which positions the holding members and the replacement members relative to one another.

Abstract: A ferrule with a fiber of this disclosure includes: a ferrule including a positioning hole, a plurality of fiber holes, and an endface perpendicular to an axial direction of the fiber holes; a lensed fiber with a GRIN lens that has been fusion spliced to a tip of an optical fiber; and a plate that can transmit light propagating through the optical fiber, the plate being attached to the endface of the ferrule, the plate being contacted against with an endface of the lensed fiber that has been inserted into each of the fiber holes, wherein the ferrule is formed with a recess that is depressed from the endface of the ferrule, a refractive index matching material is filled in a space surrounded with the plate and the recess.

Abstract: A method of securing an optical fiber to a ferrule includes: heating an adhesive composition that is disposed within the ferrule to melt the adhesive composition; inserting the optical fiber into a fiber-receiving passage defining an inner surface of the ferrule and into contact with the melted adhesive composition; and cooling the melted adhesive composition. The adhesive composition is a solid material disposed within the fiber-receiving passage of the ferrule and in contact with the inner surface of the ferrule prior to the heating step. Additionally, the adhesive composition comprises a partially cross-linked resin and a coupling agent that covalently bonds the partially cross-linked resin to respective inorganic surfaces of the optical fiber and the ferrule following the cooling step.

Abstract: A connector including a housing with a cable entry and a contact face presenting one or more conductors for signal transfer to associated conductors of a complementary connector. The connector includes a cable entry shield of an electro-conductive material gripping around the cable at the cable entry. The cable entry shield can for example be formed by a pin holder for holding alignment pins and the base of a locking device, jointly gripping around the cable.

Abstract: Evanescently-coupled planar waveguides for enhancing total internal reflection fluorescence microscopy are disclosed. The waveguides include multiple thin layers of one or more materials on a cover slip arranged resonantly enhance the optical field at the surface of the layer stack by evanescently coupling to a leaky guided mode.

Abstract: A method of manufacturing an optical waveguide with a vertical slot including the steps of a) providing a substrate successively including an electric insulator layer and a crystalline semiconductor layer, b) forming a trench on the semiconductor layer to expose the electric insulator layer and defining first and second semiconductor areas on either side, step b) being executed so that the first semiconductor area has a lateral edge extending across the entire thickness of the semiconductor layer, c) forming the dielectric layer having the predetermined width across the entire thickness of the lateral edge, the method being remarkable in that the trench formed at step b) is configured so that the second semiconductor area forms a seed layer.

Abstract: A method and apparatus for controlling operation of an electro-optic modulator is disclosed. A first intensity of light is obtained at an input to the electro-optic modulator. A second intensity of light is obtained at an output of the electro-optic modulator. A difference between the obtained first intensity and the obtained second intensity is used to control a biasing of a modulator transfer function of the electro-optic modulator to control the electro-optic modulator.

Abstract: A plug that is engaged with a receptacle for light emission of a light source unit that emits a light beam having a flat-shaped cross section and an optical fiber having a burr defect in a part of an outer peripheral portion of an incidence end surface on which the light beam is incident are included. The plug is attached to an incidence end portion of the optical fiber in an arrangement in which the burr defect is located in a short axis direction of a cross section on the incidence end surface of the light beam incident on the incidence end surface in a state in which the plug is engaged with the receptacle.

Abstract: A fiber-optic adapter with enhanced alignment is described. The adapter has two opposing housing halves and two opposing floating connector latches. Each housing half has a channel. The channels are configured to align when the two housing halves are secured together. The channels of the housing halves also have pockets which are configured to utilize a clearance fit, allowing the connector latches to float when the housing halves are secured together.