Abstract: A system, apparatus and method for providing controlled launch conditions to an optical light source comprises adjustable fiber bending/deforming apparatus to allow adjustment of the device such that multimode launch conditions can be accurately controlled. Both LED light source and OTDR/laser implementations are provided.

Abstract: The disclosure provides a method and a system for detecting a fiber fault in a Passive Optical Network (PON). The system comprises an optical path detection device, a Wavelength Division Multiplexing (WDM) coupler, a wavelength selection coupler, a branch fiber selector and a wavelength selection router. The detection system is attached to an original PON system, without influencing the operation of the original system while performing the detection. With the disclosure, the problem of being unable to determine whether there is a fault in a branch fiber due to the loss of an optical path detection reflection signal is solved, the branch fiber with a fault can be quickly located and fixed, thus the operational and maintenance costs of an operator are reduced.

Abstract: A system and method of identifying changes utilizing radio frequency polarization includes receiving a reflected and/or transmitted polarized radio frequency signal at a receiver, filtering, amplifying and conditioning the received signal, converting the received signal from an analog format to a digital format, processing the digital signal to elicit a polarization mode dispersion feature of the received signal, and comparing the polarization mode dispersion features to a known calibration to detect a change in a characteristic of the target object.

Abstract: A method includes sweeping an optical frequency of an optical signal by an optical transmitter controlling an electric-field information signal corresponding to a transmitted signal, providing different polarization states for individual frequencies of the optical signal by the optical transmitter controlling a mixture of a first electric-field information signal corresponding to a first transmitted signal and a second electric-field information signal corresponding to a second transmitted signal, obtaining, for individual frequencies of the optical signal, polarization dependent characteristics corresponding to different frequencies, when the optical transmitter sweeps the frequency of the optical signal, by an optical receiver calculating a polarization-dependent characteristic of an optical transmission line between the optical transmitter and the optical receiver, based on items of received-electric-field information corresponding to the different polarization states, and obtaining statistical information

Abstract: A system, method and apparatus for identifying fiber sequence in a multi-fiber optical cable are disclosed. The system may include an OTDR device, a receiver, and a launch box. The receiver may comprise a plurality of receiver-fibers differentiated from each other by length. Each receiver-fiber is connected to a fiber of the cable. The launch-box enables the connection of the OTDR device to each of the fibers. A user may connect the output of the OTDR to each of the front ports of a front-connector and collects a trace for each front port. The traces may comprise a marker identifying, by length, the receiver-fiber connected to the fiber. A computer program may be used to compare the traces with each other and to determine a fiber sequence in the tested multi-fiber cable. The determined sequence may be displayed on the OTDR display.

Abstract: A fiber inspection device is configured to be removably attached to a portable camera, such as a smartphone or other mobile computing device. The device may be arranged to have a slim form factor that complements the form factor of the smartphone or other device. The device may be configured to inspect a polish and/or cleave of the optical fiber. By leveraging the built in camera, computing power and user interface of a smartphone or other mobile computing device, a fiber inspection device can be inexpensively produced for inspecting a polish of an optical fiber endface using mass market camera hardware and software, without the need to develop dedicated electronics hardware or embedded software.

Abstract: A fiber inspection device is configured to inspect a cleave of an optical fiber endface. The device may also be configured to inspect a polish of the optical fiber using the same imaging hardware and/or software. Just as it is important to attain a smooth uniform polish of the optical fiber endface, it is equally important that the initial cleave generate a flat and uniform surface. If an adequate cleave is not attained, signal attenuation may occur, even if the polish of the endface is of otherwise high quality. Thus, by enabling cleave inspection both in the field and lab settings, overall quality control can be increased.

Abstract: A fiber end-surface inspection device and method illuminates the fiber end-surface from at least 2 different illumination angles, taking observations at the different angles, for detection of fiber end-surface imperfections, scratches or the like.

Abstract: An interferometer for inspecting and evaluating the end surface of an optical cable with an optical fiber includes a reader, a chuck and a reference connector. The chuck is adapted to be removably received by the interferometer. The chuck removably receives the cable. The chuck includes a chuck tag in operative proximity to the reader. The reference connector is removably received by the chuck. A cable aperture in the reference connector is for receiving the cable. The reference connector includes a reference connector tag in operative proximity to the reader. The reader is adapted to read information on the chuck tag and reference connector tag in a single operation and automatically transfer all of the read information to perform apex offset calibration in the interferometer during a single measurement. The invention also includes a method of calibrating the apex offset on a fiberoptic connector measuring interferometer.

Abstract: There is described an optical connector comprising a casing having a hollow body and at least one aperture at one end thereof, at least one optical fiber having an outer surface and a fiber end and extending inside the hollow body of the casing along a longitudinal direction thereof, a connector assembly supporting the at least one optical fiber in the casing and aligning the fiber end with the at least one aperture, and an optical monitoring device comprising at least one photodetector in proximity to the fiber end of the at least one optical fiber and adapted to detect naturally leaked light from the fiber end. An optical monitoring device and a method for monitoring optical power in an optical connector are also described.

Abstract: An optical interrogator system including a broad spectrum light source capable of emitting light having a spectral width spanning at least approximately 20 nm, and at least one optical sensor coupled to the broad spectrum light source by at least one multimode optical fiber, wherein the at least one multimode optical fiber is configured to support a plurality of propagation modes, and a method of using the same are disclosed herein.

Abstract: Disclosed is a passive illumination apparatus for improving the visibility of an optical fiber by projecting reflected light to passively illuminate an optical fiber for allowing the user improved visibility for inserting the optical fiber into an orifice. One embodiment of the concept uses a passive illumination apparatus having a pattern of one or more colors for reflectively transmitting chromatic light along with an optional contrast surface such as a gray or black stripe for providing a highly contrasting background for the user to view the optical fiber against. The ambient light is transmitted or directed from a reflective surface such as a concave curved region for passively illuminating the optical fiber. The passive illumination apparatus may be used on any suitable device such as a connector installation tool, a splicer, a stripper for an optical fiber coating or a cleaver as desired.

Abstract: A tag for securing to a person or object, comprising at least one fibre optic sensor having a plastics optical fibre that changes optical transmission characteristics with a change in temperature, and a sensor unit coupled to the optical fibre. The sensor unit is configured to detect change in the characteristic of optical transmission. The optical fibre is coupled to a locking strap to extend around a portion of a person or object. A detectable increase in attenuation of light transmitted through the optical fibre may occur when the temperature of the optical fibre is increased from a normal use temperature to at least a threshold temperature, which may be in the vicinity of the softening temperature of the optical fibre. The optical fibre may be used in electronic tags for offender monitoring to ensure the continuity of the strap, and to detect softening and stretching of the optical fibre.

Abstract: A BOTDA system that combined optical pulse coding techniques and coherent detection includes a narrow linewidth laser, two polarization-maintaining couplers, microwave generator, two electro-optic modulators (EOMs), fiber under test, an optical circulator, a 3 dB coupler, a polarization scrambler, a pulse generator, a balance photodetector, an electrical spectrum analyzer, digital signal processing unit and a frequency shifter. The optical pulse coding techniques and coherent detection are simultaneously used in the invented system, which can be enhance the signal-to-noise ration (SNR), the measuring accuracy and the sensing distance of BOTDA. Moreover, the proposed system has the capacity of break interrogation.

Abstract: An optical power monitoring device includes a photodetector disposed in close proximity to the cladding of an optical fiber for measuring Rayleigh scattered light from the core of the optical fiber. To ensure only Rayleigh scattered light is measured, a cladding stripper is provided to remove any cladding light prior taking a reading with the photodetector.

Abstract: The fiberscope for inspecting and cleaning a fiber connector simultaneously includes a housing with a front panel, a microscope system, a connector holder mounted at a distance from the front panel for receiving a connector ferrule of a fiber connector, and a translation stage for moving the microscope system transversely to align its optical axis with the connector ferrule. The fiberscope further includes a hand knob attached to a fine screw through the connector holder for adjusting the vertical position of the connector ferrule, a mirror pivotally mounted between the connector holder and the front panel, an LED lamp, air nozzles attached to the front panel, and a cleaning air tube for supplying compressed air to the air nozzles. The cleaning air from the air nozzles spray sideways onto the fiber endfaces so that the cleaning air bounces off sideways to avoid secondary contamination.

Abstract: A reinforcing cable for a prestressed concrete structure is disclosed. The cable has an optical fiber entwined between the twisted wire ropes that form the cable. The optical fiber facilitates in situ monitoring of cable integrity by comparing optical signal transmission over time.

Abstract: A method for conducting fast Brillouin optical time domain analysis for dynamic sensing of optical fibers is provided herein. The method includes the following stages: injecting a pump pulse signal into a first end of an optical fiber and a probe signal into a second end of the optical fiber, wherein the probe and the pump pulse signals exhibit a frequency difference between them that is appropriate for an occurrence of a Brillouin effect; alternating the frequency of either the probe or the pulse signals, so as the alternated signal exhibits a series of signal sections, each signal section having a predefined common duration and a different frequency; measuring the Brillouin probe gain for each one of the alternating frequencies; and extracting physical properties of the optical fiber throughout its length at sample points associated with the sampled time and the frequencies, based on the measured Brillouin probe gain.

Abstract: A personnel monitoring system. The personnel monitoring system includes a host node having an optical source for generating optical signals, and an optical receiver. The personnel monitoring system also includes a plurality of fiber optic sensors for converting at least one of vibrational and acoustical energy to optical intensity information, each of the fiber optic sensors having: (1) at least one length of optical fiber configured to sense at least one of vibrational and acoustical energy; (2) a reflector at an end of the at least one length of optical fiber; and (3) a field node for receiving optical signals from the host node, the field node transmitting optical signals along the at least one length of optical fiber, receiving optical signals back from the at least one length of optical fiber, and transmitting optical signals to the optical receiver of the host node.

Abstract: Systems and methods for inspecting wound optical fiber to detect and characterize defects are disclosed. The method includes illuminating the wound optical fiber with light from a light source and capturing a digital image based on measurement light that is redirected by the wound optical fiber to a digital camera. The method also includes processing the digital image with a computer to detect and characterize the defects. The types of defects that can be detected using the systems and methods disclosed herein include bubbles, abrasions, punctures, scratches, surface contamination, winding errors, periodic dimensional errors, aperiodic dimensional errors and dents.

Abstract: A fitting tip of fiber-optic connector endface inspection microscope for inspecting angled connector endfaces includes a relay lens fixed inside its internal channel and is designed such that when it is received in an intended connector adapter and mounted to the inspection microscope, the normal line to the connector endface forms an acute angle ? with the optical axis of the relay lens; the ray exiting from the relay lens and conjugate to the ray along the normal line is aligned with the optical axis of the inspection microscope; and as a result the connector endface is imaged on an imaging plane within the focusing adjustment range of the inspection microscope. The best image of the connector endface is obtained when the angle ? is half of the inclined angle of the angled connector endface.

Abstract: A live fiber identifier tool includes a head portion having a slot. A cable containing a pair of optical fibers can be inserted in the slot and forced to bend inside the head portion when a trigger is operated. Any light signal in a given fiber partially leaks from the fiber and exits the cable bend. Two photo detectors are located so that one of the detectors receives more light from the cable bend than the other detector depending on the signal direction in the given fiber. Processing components coupled to the detectors and the indicator define a threshold factor that corresponds to a determined difference between the outputs of the detectors. If the difference between the detector outputs does not exceed the threshold factor, an indicator on the tool reports that light signals are traveling in the pair of optical fibers in opposite directions along the cable.

Abstract: A method for testing the operation of an optical fiber cable in a communication network using an optical time domain reflectometer (OTDR) instrument includes receiving a range of identifiers of fiber sets to be tested. Identifiers of a first fiber set are displayed. The first fiber set is included in the range and constitutes a next fiber set to be tested. A determination is made whether the first fiber set is connected to the OTDR instrument. In response to determining that the first fiber set is connected to the OTDR instrument, a test of the first fiber set is performed using the OTDR instrument. Identifiers of a second fiber set are displayed. The second fiber set is included in the range and constitutes a next fiber set to be tested.

Abstract: Checking continuity along an optical fiber includes mounting an inspection attachment member to a smart phone; inserting a first end of the optical fiber into a receiving arrangement of the inspection attachment member to align the first end with a light source of the smart phone; activating the light source of the smart phone to shine a light along the optical fiber; and determining whether the light is visible at an opposite end of the optical fiber. Certain types of inspection attachment members also are configured to align an end of an optical fiber with a camera lens of the smart phone.

Abstract: An optical time domain reflectometer (OTDR) system with an integrated high speed optical modulator is capable of operating at a speed similar to the OTDR pulse width to improve the measurement resolution and reduce the time required to acquire a high dynamic range OTDR measurement over existing approaches. ASICs can be used to control the modulator and generation of pulses. The high-speed optical modulator enables high resolution single-photon OTDR measurement by blocking out all return light except from the region of fiber under examination.

Abstract: A test system for checking a splice connection between a fiber optic connector and one or more optical fibers includes a body, an adapter movable relative to the body between a first position and second position, and an optical power delivery system. The adapter has a first connector receiving area configured to interface with a first type of fiber optic connector and a second connector receiving area configured to interface with a second type of fiber optic connector. The optical power delivery system is configured to deliver light energy to the first connector receiving area when the adapter is in the first position and the second connector receiving area when the adapter is in the second position. Related methods and installation tools incorporating such test systems are also disclosed.

Abstract: A characteristic compensation method includes obtaining compensation information when degradation of a transmission characteristic of an optical transmission path of a received light signal is compensated for by using digital signal processing with respect to an electric signal obtained by photoelectrically converting the light signal, calculating an compensation value for a characteristic compensation device that optically compensates for degradation of the transmission characteristic to start characteristic compensation, based on the compensation information with respect to the light signal, setting the compensation value in the characteristic compensation device, and switching a state in which compensation is done using the digital signal processing to a state in which compensation is done using the characteristic compensation device after the setting of the compensation value is completed.

Abstract: The present disclosure describes an apparatus including a composite panel. The apparatus includes a first composite panel including a first optical fiber embedded therein, the first optical fiber being arranged in a pattern, and a first input port connected to a first end of the first optical fiber, the first input port configured to receive an optical signal from an optical time domain reflectometer. The optical time domain reflectometer is configured to send the optical signal through the first input port and measure a strength of a reflected optical signal that is reflected back from the first optical fiber, wherein the strength indicates a measured optical impedance of the first optical fiber. A measured optical impedance that is substantially the same as a baseline optical impedance for the fiber indicates no damage, while a measured optical impedance that differs from the baseline optical impedance by a predetermined threshold indicates damage.

Abstract: A method, an apparatus and a system for detecting a connection status of an optical fiber jumper are provided in the embodiments of the present invention. The method for detecting a connection status of an optical fiber jumper includes: judging a connection status of a second port and a first port according to whether an optical signal sent by the first port to the second port through a first optical fiber is received, wherein the first optical fiber is connected to two ends of an optical fiber jumper, and the two ends of the optical fiber jumper are connected to the first port and the second port respectively; and obtaining a port identification corresponding to the first port according to the optical signal if the optical signal is received.

Abstract: Methods and devices provide for storing historical data that includes interference values mapped to at least one of bend radii values, lifetime values, or failure rate values of optical fibers; transmitting an optical signal, via a test system, toward the optical fiber under test; setting a polarization state of the optical signal before the optical signal propagates through the optical fiber under test; setting a polarization state of a reflected optical signal that has propagated through the optical fiber under test in a manner that causes a minimum interference or a maximum interference; measuring instances of power of the reflected optical signal; and outputting a result that includes at least one of a bend radius value, a lifetime value, or a failure rate that applies to the optical fiber under test based on the measured instances of power and the historical data.

Abstract: A method for manufacturing a lens having a refractive index distribution includes: a step of contacting a monomer with a structural member of a polymer, the monomer and a material obtained by polymerization of the monomer showing refractive indices which are different from the refractive index of the polymer; a step of diffusing the contacted monomer in the structural member; and a step of polymerizing the monomer. In the step of diffusing the contacted monomer in the structural member, the method further includes the steps of: irradiating light on at least 50% of one of the surfaces of the structural member which is parallel to the diffusion direction of the monomer, and measuring the intensity of the light passing through the structural member in a predetermined region, and when the measured intensity of the light reaches a predetermined value, the step of polymerizing the monomer is started.

Abstract: A diagnostic module may include an inspection device, a cleaning device, and in various other examples, a verification device. The inspection device may inspect an optical fiber end-face of an optical fiber. The cleaning device may clean the optical fiber end-face of the optical fiber. The diagnostic module may automatically move from an optical connector to another optical connector.

Abstract: This element includes a plurality of longitudinal carbon fiber filaments (52) and a polymeric matrix (50) receiving the filaments (52) for binding them together, the matrix (50) forming a ribbon intended to be wound around a longitudinal body of the flexible line. The armor element (42) includes at least one optical fiber (54) received in the matrix (50), the optical fiber (54) having an elongation at break of more than 2%, as measured with the ASTM-D 885-03 standard.

Abstract: A system includes a wavelength tunable laser to provide a first optical pulse of a first wavelength and a second optical pulse of a second wavelength to an optical fiber, a reflection detector to determine a first fiber attenuation curve from the first reflected pulse and a second fiber attenuation curve from the second reflected pulse, and a discontinuous loss event analyzer to identify a discontinuous loss event at a discontinuous loss point in at least one of the first fiber attenuation curve and the second first fiber attenuation curve, determine a return loss slope based on a return loss at the discontinuous loss point for the first fiber attenuation curve and a return loss at the discontinuous loss point for the second first fiber attenuation curve, and determine whether the discontinuous loss event is a bad fiber bending event based on the return loss slope.

Abstract: A long-distance fiber optic monitoring system having a sensing unit and an analyzer that is remotely located from the sensing unit is provided. The sensing unit comprises a source of optical energy for injecting optical energy into the fiber optical cable and an optical detector configured to detect an optical return signal from the optical fiber. The detected optical return signal is associated with an acoustic signal impinging on the optical fiber. The analyzer receives a signal from the remote sensing unit via the optical fiber that is representative of the optical return signal, and determines a location of a disturbance based at least on the received signal. The representative signal can be transmitted from the remote sensing unit to the analyzer as an optical signal or via a metallic wired included with the optical fiber.

Abstract: A method of evaluating integrity of a fiber comprises transmitting a measurement light beam through the optical fiber and measuring an intensity of a combined reflection of the measurement light beam. The combined reflection includes a proximal end reflection component and a distal end reflection component. The method further comprises separating the proximal end reflection component from the combined reflection to obtain a calibrated intensity measurement; and analyzing the calibrated intensity measurement to determine the integrity of the optical fiber.

Abstract: A test pulse is generated from a first and a second test light beam pulse with different wavelengths, with a predetermined time difference applied between the first and the second test light beam pulse. A circulator inputs the test pulse to a trunk fiber of a measurement target fiber line. A reflected light is extracted which is output from an input end of the trunk fiber. A filter extracts stimulated Brillouin backscattered light. A receiver receives and converts the scattered light into an electrical signal. A processing device carries out the signal to determine in which of N branched fibers the stimulated Brillouin scattered light is generated, while varying a time difference between the first and the second test pulse.

Abstract: Calibration of optical time domain reflectometry optical loss measurement in optical fibers having potentially dissimilar light backscattering properties is disclosed. For example, an optical time domain reflectometer (OTDR) can be employed to perform a single-ended optical loss measurement on an optical fiber before and after joinder (e.g., a splice) to determine the efficiency of the joinder. The individual optical fibers provided in a joined optical fiber may have dissimilar backscatter light collection efficiencies resulting in an erroneous OTDR optical loss measurement, because an OTDR assumes the backscatter light collection efficiency of the joined optical fiber is identical before and after joinder. An OTDR calibration factor is first determined before an OTDR optical loss measurement of the joined optical fiber is made. The OTDR calibration factor is used to correct any error in an OTDR optical loss measurement of the joined optical fiber.

Abstract: A method for compensating for both material or chromatic dispersion and modal dispersion effects in a multimode fiber transmission system is provided. The method includes, but is not limited to measuring a fiber-coupled spatial spectral distribution of the multimode fiber laser transmitter connected with a reference multimode fiber optical cable and determining the amount of chromatic dispersion and modal dispersion present in the reference multimode fiber optic cable. The method also includes, but is not limited to, designing an improved multimode fiber optic cable which compensates for at least a portion of the chromatic dispersion and modal dispersion present in the reference multimode fiber optic cable resulting from the transmitter's fiber-coupled spatial spectral distribution.

Abstract: The invention provides a monitoring device (32) for a dryer (10) includes a means for sensing a physical parameter, such as temperature or strain, at a sensing locus within the dryer (10), for example at a vial (20). The sensing means comprises an optical sensing fiber (38) having at least one fiber Bragg grating (54). Moreover, the invention provides a dryer, in particular a freeze dryer (10), which is equipped with such monitoring device (32).

Abstract: The invention relates to a test adapter (1) for operatively connecting a chip to be tested to a test device. The test adapter has a three-dimensional construction with a baseplate (8) and a cover plate (2). The cover plate (2) has a contact array (3) having contact elements (9) coordinated with the chip to be tested in terms of number and arrangement. Arranged between the baseplate (8) and the cover plate (2) are side walls (4) which are arranged at an angle with respect to the cover plate (2) and have a number of individual connectors (5) that is coordinated with the chip to be tested.

Abstract: A differential mode delay (DMD) measurement system for an optical fiber is provided. The system includes an optical test fiber with a plurality of modes; a single mode light source that provides a continuous light wave signal to a modulator; and a pulse generator that provides an electrical pulse train signal to the modulator and a triggering signal to a receiver. The modulator is configured to generate a modulated optical test signal through the optical fiber based at least in part on the received light wave and pulse train signals, and the receiver is configured to receive the test signal transmitted through the fiber and evaluate the test signal based at least in part on the triggering signal. The system can be employed to create DMD waveform and centroid charts to obtain minEMBc bandwidth information for a fiber within a wavelength range.

Abstract: Briefly, embodiments of methods and/or systems for tomographic imaging are disclosed.

Abstract: A fiber measurement device includes: a light detector adapted to detect feedback light of laser light output to a fiber; a band limiting circuit adapted to extract, from a signal depending on the feedback light, a signal having a component corresponding to a frequency of the laser light, wherein the signal extracted by the band limiting circuit is a first differentiation target signal; and a waveform equalizing circuit having a differentiating and adding circuit adapted to differentiate the first differentiation target signal to generate a first differentiation result signal and to add the first differentiation target signal and the first differentiation result signal.

Abstract: In a first aspect, the method and apparatus of the present disclosure can be used to periodically and/or intermittently place one or more ONUs attached to a PON in a power savings mode so that an OTDR test can be performed. While in the power savings mode, the ONUs temporarily suspend their transmitter function and power down their upstream lasers. In a second aspect, the method and apparatus of the present disclosure can be used to coordinate the performance of OTDR during one or more periodic or intermittent discovery slots used to detect and register ONUs recently connected to the PON. Because new ONUs are infrequently connected to the PON and ONUs already registered are not permitted to transmit during the discovery windows, OTDR can be performed during these windows without impacting, to a great degree, the normal operation of the PON.

Abstract: The disclosed technology in this patent document includes, among others, methods apparatus for distributed measuring at least one fiber bend or stress related characteristics along an optical path of fiber under test (FUT) uses both a light input unit and a light output unit connected to the FUT at one single end.

Abstract: A method and apparatus for testing an optical cable is provided. In one embodiment, the apparatus may include a receiver for receiving a received pulse train through the optical cable. The apparatus may further include a cross-correlation system in communication with the receiver. The cross-correlation system may be adapted to determine a cross-correlation of the received pulse train and matched filter to an expected pulse train. The apparatus may further include a comparator in communication with the cross-correlation system. The comparator may be adapted to compare the cross-correlation to a threshold. The apparatus may also include an output transmitter, in communication with the comparator. The output transmitter may be able to output a comparison-result output that includes the results of the comparator comparison of the cross-correlation against a threshold.

Abstract: A fiber optic inspection microscope including an objective lens, an optical detector, an image detector, an illumination source, and first and second beamsplitters, wherein the first beamsplitter is in a first optical path between the objective lens, the image detector and the optical detector, wherein the first beamsplitter allows passage of an optical image to the image detector, wherein the first beamsplitter directs optical energy to the optical detector, wherein the second beamsplitter is in a second optical path between the illumination source and the objective lens, and wherein the second beamsplitter directs light from the illumination source to the objective lens.

Abstract: A method, apparatus and system for minimally intrusive fiber identification includes imparting a time-varying modulation onto an optical signal propagating in an optical fiber and subsequently detecting the presence of the time-varying modulation in the optical signal transmitting through the fiber to identify the fiber. In a specific embodiment of the invention, a time-varying curvature is imposed on the fiber to be identified and the presence of the resultant time variation in the transmitted power of a propagating optical signal is subsequently detected for identification of the manipulated fiber.

Abstract: A fitting tip of fiber-optic connector endface inspection microscope for inspecting angled connector endfaces includes a relay lens fixed inside its internal channel and is designed such that when it is received in an intended connector adapter and mounted to the inspection microscope, the normal line to the connector endface forms an acute angle ? with the optical axis of the relay lens; the ray exiting from the relay lens and conjugate to the ray along the normal line is aligned with the optical axis of the inspection microscope; and as a result the connector endface is imaged on an imaging plane within the focusing adjustment range of the inspection microscope. The best image of the connector endface is obtained when the angle ? is half of the inclined angle of the angled connector endface.