Abstract: A semiconductor substrate, an insulating layer made of silicon oxide formed on the semiconductor substrate and a semiconductor layer made of silicon formed on the insulating layer are provided, and the semiconductor layer constitutes an optical waveguide in an optical signal transmission line section and an optical modulator in an optical modulation section. Also, the insulating layer is removed except for a part thereof to have a hollow structure with a cavity, and both side surfaces and a lower surface of each of the semiconductor layers constituting the optical waveguide and the optical modulator are exposed and covered with air.

Abstract: An optical device capable of suppressing a reflected light at an end of an optical waveguide regardless of the width of the optical waveguide is provided. An optical device includes an optical waveguide and a terminator. The optical waveguide is formed on a substrate. The terminator is formed on the substrate in such a way that the terminator is connected to one end of the optical waveguide, includes a curved optical waveguide having such a curvature that it causes a bending loss in an input light input from the optical waveguide, the input light decaying as it propagates through the curved optical waveguide.

Abstract: The present invention relates to an optical fiber connector that finds application in the general field of optical inter-connection. The optical fiber connector (1a, 1b, c) includes a body (2) having a bore (3) configured to receive an optical fiber; an alignment sleeve (4) that is arranged coaxially with the bore (3); an optical fiber (5) having an end face (6); wherein the optical fiber (5) is arranged within the bore (3). At least at the end face (6) the optical fiber connector includes an optical signature component (50, 51, 52) having a predetermined optical signature.

Abstract: A connector-incorporating plug contains a connector to be inserted into and connected to an adapter in a receptacle and is connected to the receptacle. The connector-incorporating plug includes a housing that is located at a back-end side of the connector in a direction of insertion, to hold the connector, a spring pressing the housing in the direction of insertion, a holder that is located in front of a flange portion formed on the housing and that is mounted to the housing, and a shell member. The holder is pressed by the spring through the flange portion to butt against a projection formed on the inner wall of the shell member, and is kept there. The housing is movable with respect to the holder only along a first axis orthogonal to the direction of insertion. The holder is movable with respect to the shell member only along a crossing axis.

Abstract: In order to solve the problem of making optical signals pass at a low loss and low polarization dependence, this optical circuit element is configured from rib-type optical waveguides, each of which is configured from a core region, including a planar slab and protruding ribs, and cladding regions that are provided in contact with the top and the bottom of the core region. A first optical waveguide that is provided in the optical circuit element is provided with a plurality of intersection points where the first optical waveguide intersects optical waveguides other than the first optical waveguide, said intersection points being disposed on one straight line.

Abstract: A method and system for monitoring a cable within a coiled tubing is disclosed. A first set of excitation signals is applied to the coiled tubing at a first point in time. The first set of excitation signals comprises one or more signals applied at one or more depths. The cable is positioned at a first location within the coiled tubing at the first point in time. A signal corresponding to the first set of excitation signals is detected at one or more fiber optic lines associated with the cable and location of the cable within the coiled tubing is determined using the detected signal corresponding to the first excitation signal.

Abstract: An apparatus for converting fiber mode to waveguide mode. The apparatus includes a silicon substrate member and a dielectric member having an elongated body. Part of the elongated body from a back end overlies the silicon substrate member and remaining part of the elongated body up to a front end is separated from the silicon substrate member by a second dielectric material at an under region. The apparatus also includes a waveguide including a segment from the back end to a tail end formed on the dielectric member at least partially overlying the remaining part of the elongated body. The segment is buried in a cladding overlying entirely the dielectric member. The cladding has a refractive index that is less than the waveguide but includes an index-graded section with decreasing index that is formed at least over the segment from the tail end toward the back end.

Abstract: According to one aspect, an optical waveguide comprises a plurality of coupling cavities for directing light into a waveguide body spaced from a particular point. Further, each of the coupling cavities comprises a dimension that varies with distance from the particular point.

Abstract: A fixture (44/244) is for forming a fiber optic array (10/110/210) that defines a plurality of discrete fibers (12) extending from a spaced-apart arrangement to a consolidated arrangement wherein the fibers (12) are layered next to each other for a further ribbonizing process. The fixture (44/244) includes a pair of contact blades (54/254) that are configured to slide along a direction transverse to the longitudinal axes of the fibers (12) for consolidating the fibers (12).

Abstract: A pluggable connector with anti-electromagnetic interference capability is disclosed in this invention, which includes a socket housing, multiple terminal assemblies and a shielding case. The socket housing includes an insulating base, a first anti-EMI block independently mounted on the insulating base and a second anti-EMI block independently mounted on the insulating base. The first anti-EMI block and an upper bracket can be combined together to form an upper circuit board slot, and the second anti-EMI block and a lower bracket can be combined together to form a lower circuit board slot. The pluggable connector of the present invention has a good anti-electromagnetic interference capability by the first and second anti-EMI blocks.

Abstract: An optical isolator for suppressing back reflections from a downstream optical system is described. The optical isolator includes a plurality of optical paths between a splitter and a combiner. One or more of the optical paths include two phase modulators that are driven by oscillating signals having predefined phase relationships. At least one bypass optical path does not include two phase modulators driven by oscillating signals. Amplitude and phase of an optical signal traversing the bypass optical path may be tuned to further suppress residual reflections from a downstream optical system.

Abstract: An apparatus for converting fiber mode to waveguide mode. The apparatus includes a silicon substrate member and a dielectric member having an elongated body. Part of the elongated body from a back end overlies the silicon substrate member and remaining part of the elongated body up to a front end is separated from the silicon substrate member by a second dielectric material at an under region. The apparatus also includes a waveguide including a segment from the back end to a tail end formed on the dielectric member at least partially overlying the remaining part of the elongated body. The segment is buried in a cladding overlying entirely the dielectric member. The cladding has a refractive index that is less than the waveguide but includes an index-graded section with decreasing index that is formed at least over the segment from the tail end toward the back end.

Abstract: An optical fiber cable includes a first cable segment; a second cable segment; and a splice enclosure. The first cable segment can have a different configuration than the second cable segment. The splice enclosure is coupled to the strength member and strength component of the first cable segment and the second cable segment. One example splice enclosure includes a first enclosure body having a first threaded connection region and a second enclosure body having a second threaded connection region. Another example splice enclosure includes a tubular enclosure with two end caps. Cable retention members are positioned within the splice enclosure at fixed axial positions.

Abstract: A tunable optical filter integrates the functions of wavelength tuning and power isolation of back reflection. The optical signal enters a Faraday rotator twice, and isolation is provided by two birefringent crystals, having their optical axes oriented at 45 degrees with respect to each other. The two birefringent crystals are on the same side of the Faraday rotator. The integration of an optical tunable filter and an isolator function into a single packaged component helps to reduce the size and complexity of optical amplifier systems, such as EDFAs and PDFAs, operating in the 1550 nm and 1310 nm transmission bands, respectively.

Abstract: Novel methods and systems for waveguide fabrication and design are disclosed. Designs are described for fabricating ridge, buried and hybrid waveguides by a femtosecond pulsed laser. A laser system may combine a diode bar, a wavelength combiner and a waveguide. The waveguide may convert the electromagnetic radiation of an infrared laser into that the visible-wavelength range.

Abstract: A cable attach structure for attaching a fiber-optic cable to a rear end and a connector to a front end is disclosed. In one embodiment, the cable attach structure is a portion of a fiber optic cable assembly having a fiber optic cable with at least one optical fiber and a connector attached to the optical fiber. The fiber optic cable is attached to the cable attach structure at a rear end and circuit board is attached to the cable attach structure at the front end. The cable attach structure also routes the at least one optical fiber away from the centerline of the connector for off-axis fiber routing. In other embodiments, the optical fiber can enter the connector from a first direction and attach to the connector in a second direction if desired.

Abstract: Disclosed are structures and methods for active optic cable (AOC) assembly having improved thermal characteristics. In one embodiment, an AOC assembly includes a fiber optic cable having a first end attached to a connector with a thermal insert attached to the housing for dissipating heat from the connector. The AOC assembly can dissipate a suitable heat transfer rate from the active components of the connector such as dissipating a heat transfer rate of 0.75 Watts or greater from the connector. In one embodiment, the thermal insert is at least partially disposed under the boot of the connector. In another embodiment, at least one component of the connector has a plurality of fins. Other AOC assemblies may include a connector having a pull tab for dissipating heat from the assembly.

Abstract: The optical device includes a waveguide positioned on a base and a modulator positioned on the base. The modulator includes a ridge of an electro-absorption medium having a top side and a lateral side. The lateral side is between the top side and the base and the top side has a width. The waveguide is configured to guide a light signal through the modulator such that the light signal is guided through the ridge of electro-absorption medium. A heater is positioned over the lateral side of the electro-absorption medium without being positioned over the entire width of the ridge.

Abstract: The inventive configurable optical fiber polarization mode coupler is capable of providing a low-loss, high-coupling coefficient interface with high accuracy and easy alignment between a plurality of optical fibers (or other optical devices) with a first channel-to-channel spacing, and an optical device having a plurality of closely-spaced waveguide interfaces with a second channel-to-channel spacing, where each end of the optical fiber coupler array is configurable to have different channel-to-channel spacing, each matched to a corresponding one of the first and second channel-to-channel spacing, and that are preferably optimized for use with photonic integrated circuits, such as coupling to dense optical input/output interfaces, wafer-level testing, etc.

Abstract: Optical connector systems are disclosed. In one embodiment, an optical port includes a substrate, a laser silicon chip, an interposer, and a receptacle housing. The laser silicon chip includes an optical source, a laser beam emitting surface, and a grating at the laser beam emitting surface. The laser silicon chip is coupled to the substrate such that the laser beam emitting surface is transverse to the mounting surface of the substrate. The interposer includes an interposer fiber support bore, and is coupled to the laser beam emitting surface of the laser silicon chip such that the interposer fiber support bore is substantially aligned with the grating of the laser silicon chip. The receptacle housing includes a receptacle mating surface and defines an enclosure operable to receive a fiber optic connector. The receptacle mating surface includes a receptacle fiber support bore aligned with the interposer fiber support bore.