A microscope may receive a fiber optic connector via a connector adapter of the microscope, wherein the connector adapter includes an opening and a shaped reflective surface surrounding the opening. The microscope may align a ferrule of the fiber optic connector with the opening of the connector adapter of the microscope, wherein the ferrule includes a ferrule chamfer or a ferrule radius. The microscope may transmit direct light onto the shaped reflective surface and may receive reflected light from the ferrule chamfer or the ferrule radius and with a camera of the microscope.

The present disclosure relates to a polarity test system and method used for MPO optical cables, and provides a polarity test system used for MPO optical cables, where the MPO optical cable comprises a first end-face, a second end-face and a plurality of optical fibers extended between the first end-face and the second end-face, with each optical fiber comprising a first end arranged at the first end-face and a second end arranged at the second end-face. The system comprises: a light source, configured to irradiate the first end-face of the MPO optical cable so that the light transmitted from the light source enters the optical fibers from the first end of the optical fibers and leaves the optical fibers from the second end of the optical fibers; a baffle, set between the light source and the first end-face that can move relative to the first end-face to block the first end of one or a plurality of optical fibers, and configured to change the nature of light received by the optical fibers which first end is blocked by the baffle; and a detection device, configured to detect the light output by the second end of each optical fiber as the baffle moves relative to the first end-face.

It is an object of the present invention to provide an aerial optical fiber cable inspection method, an aerial optical fiber cable inspection device, and a program which can identify a cable sagging section from vibration sensing results. In the aerial optical fiber cable inspection method according to the present invention, a vibration distribution waveform along the longitudinal direction of an aerial optical fiber cable measured using an optical fiber vibration sensing device is received as an input, a standard deviation of the amplitude of vibration at each position in the vibration distribution waveform is calculated, and a section with a standard deviation larger than that of other sections is identified as a cable sagging section.

An inspection tool for allowing visual inspection of an end face of a fiber optic ferrule. The inspection tool includes a passage for allowing a camera to view the end face. The inspection tool also includes light directing structure for first directing ferrule illumination light axially along the inspection tool, and then reflecting the axial light across the end face of the fiber optic ferrule.

Distributed fiber optic sensors formed by covering the fibers with tubing are provided. The tubing including responsive materials formulated or configured to, responsive to exposure to one of a target chemical species and a target radiation particle, change a relative size and generate a localized effect on or in the optical fiber.

In an optical fiber monitoring system which detects physical disturbance or other parameters such as temperature or strain of a fiber where a monitor signal is transmitted along the optical fiber and analyzed to detect changes which are indicative of an event, a method is provided for periodically checking proper operation of the optical fiber monitoring system. :A fiber disturbance actuator periodically causes a pattern of disturbances of a portion of the fiber at a predetermined location thereon where the disturbance is characteristic of the event to be monitored. The monitor signal is analyzed to detect the pattern of changes and in the event that expected changes are not detected, a warning is issued that the intrusion detection system is not properly operating.

In an optical fiber monitoring system which detects physical disturbance or other parameters such as temperature or strain of a fiber where a monitor signal is transmitted along the optical fiber and analyzed to detect changes which are indicative of an event, a method is provided for periodically checking proper operation of the optical fiber monitoring system. A fiber disturbance actuator periodically causes a pattern of disturbances of a portion of the fiber at a predetermined location thereon where the disturbance is characteristic of the event to be monitored. The monitor signal is analyzed to detect the pattern of changes and in the event that expected changes are not detected, a warning is issued that the intrusion detection system is not properly operating.

The present invention relates to a method and device for measuring optical nonlinearity of an optical fiber to be measured comprising a plurality of cores having mutually coupled waveguide modes. The method includes, at least, preparing a laser light source emitting laser light and a detecting unit determining an optical intensity, inputting laser light into a specific core of the optical fiber to be measured, determining the intensity of a specific wavelength component caused by optical nonlinearity among the reflective light components from the optical fiber to be measured, and determining optical nonlinearity of the optical fiber to be measured on the basis of the intensity of the specific wavelength component.

The systems and methods disclosed herein are used to estimate the insertion loss of an anticipated optical connection between a first optical connector having least one first optical fiber and a second optical connector having at least one second optical fiber. The method includes extracting first connector information stored on the first optical connector to obtain extracted first connector information and extracting second connector information stored on the second optical connector to obtain extracted second connector information. The estimated insertion loss of the anticipated optical connection between the first optical connector and the second optical connector is calculated using the extracted first connector information and the extracted second connector information. The total estimated insertion loss of a fiber link that includes one or more such optical connections can be used to qualify the fiber link without having to directly measure the fiber link insertion loss.

Provided is a screening apparatus or the like of an optical fiber that can suppress or prevent occurrence of a fiber-strike on the side of a feeding bobbin regardless of the weight of the feeding bobbin. An embodiment has a feeding bobbin 12 that feeds out an optical fiber 10; a screening unit 16 that applies a tension to the optical fiber 10 fed out from the feeding bobbin 12; a first capstan 14 that feeds the optical fiber 10 into the screening unit 16; a winding bobbin 20 that winds the optical fiber 10 to which the tension is applied by the screening unit 16; and a control unit 70 that, when disconnection of the optical fiber 10 occurs due to the tension applied by the screening unit 16, controls the feeding bobbin 12 and the first capstan 14 so as to stop rotation of the feeding bobbin 12 and rotation of the first capstan 14 and sets a deceleration rate of the first capstan 14 in accordance with a deceleration rate of the feeding bobbin 12.