Abstract: In order to create a diffraction grating in an optical fiber with a predetermined pattern of the refractive index, an ultraviolet radiation beam (3) is scanned (5, 8) along a phosensitive portion (F′) of the fiber through a phase mask (9) and, during the scan, the beam intensity (4) and the mask-fiber distance (10) are controlled moment by moment in such a way as to obtain the desired patterns of the mean value and of the envelope of the refractive index, respectively.

Abstract: A technique for testing the quality of optical components of a line-narrowing module is performed on-line. As the wavelength tends to drift from a desired value when the optical components of the line-narrowing module are heated due to absorption, one or more optical components is adjusted such as by rotation to tune the wavelength back to the desired wavelength using a feedback loop. The amount of adjustment of these optical components is monitored for indirectly measuring, and thereby testing, the absorption or quality of the optical components.

Abstract: A device and system for eliminating repeated testing of optical components while manufacturing an optical assembly can include a high-performance optical component having a machine-readable identifier disposed within the peripheral area of its end face. The machine-readable identifier can be etched into the end face and can provide information about the component, such as any one of the following optical characteristics: orientation, manufacturing information, and dimensions and compositions of the materials of the optical component. The optical component can also have a plurality of machine-readable identifiers disposed within the peripheral area of its end face, where each can provide different information. Optical components can then be automatically and precisely aligned before being mated to form an optical assembly. A determination of the optical characteristics, information, and alignment of the components can be possible even after the components are mated together.

Abstract: A corner wall-mount fiber optic connector housing includes an enclosure having a back plate for mounting in a corner between two walls. The enclosure is provided with at least one provider port for entry of a fiber optic provider cable having a plurality of optical fibers and at least two customer ports for entry of a fiber optic customer cable having a plurality of optical fibers. At least two fiber optic connector panel mounts located within the enclosure have an aperture for receiving a plurality of connectors to optically interconnect the fibers of the provider cable with the fibers of the customer cable. The back plate is formed in two planes at an angle to each other for mounting in the corner, and one of the customer ports and one of the connector panel mounts is positioned adjacent a respective one of the two planes of the back plate.

Abstract: A method for determining whether an imager assembly outside of a camera body meets predetermined focus specifications, wherein the imager assembly includes an image sensor and a camera mounting plate having reference features adapted to cooperate with alignment features in the camera body to locate the image sensor at a predetermined focal plane, including the steps of: mounting the imager assembly onto an imager mounting apparatus having equivalent alignment features; and utilizing low-coherence light interferometry to determine whether the image sensor will meet predetermined focus specifications when mounted in a camera body.

Abstract: A fiber strain relief apparatus is disclosed with bend radius limiter and slack storage. The strain relief mechanism is a bend limiter drum with three lugs, a strain relief pivoting top with latch, a latch stopper handle, a compressible gasket, and a base with latch. Fiber slack is wound around the bend limiter drum. Fibers are prevented from sliding off by the lugs. A gasket compresses on to the fibers producing a strain relief action, while the slack is being stored on the drum. Unlatching the strain relief top is performed by compressing the top latch against the latch stopper. The strain relief top pivots around a living hinge producing access to the drum. Cable is coiled around the drum and the strain relief top is latched, holding the fiber against the drum. A base latch is provided allowing the device to be mounted and removed from a panel.

Abstract: A fiber optic plug for connecting to a receptacle of a small format optoelectronic package or device. The fiber optic plug includes a body and ferrules attached to the body. Each ferrule has an aperture for receiving and holding an optical fiber and each ferrule has a diameter substantially equal to 1.25 mm. The aperture of each adjacent ferrule is separated by a distance of approximately 3.125 mm. The ferrules exist in a plane.

Abstract: An optical communication system having a structure for effectively suppressing occurrence of a nonlinear optical phenomenon in WDM transmission in the 1.58 pm wavelength band. The optical communication system is a hybrid transmission unit including a dispersion-shifted optical fiber having a zero-dispersion wavelength in the 1.55 &mgr;m wavelength band, a dispersion DDSF and a length LDSF, and a high-dispersion fiber having dispersion D1 and length L1. A signal light having the shortest wavelength and having a bit rate B in the signal light wavelength band, the hybrid transmission unit satisfies the following condition: &Dgr;&phgr;XPM·DT≦18000 (unit: (ps/nm)·(Gb/s)2) DT=(DDSF·LDSF+D1·L1)·B2 where &Dgr;&phgr;XPM is the total phase shift amount of cross-phase modulation in the signal light having the shortest wavelength under the influence of signal light having the other wavelengths, and DT is the total dispersion in the hybrid transmission unit.