494 results about "Optical fiber bundle" patented technology

The invention discloses an optical fiber bundle end face performance test method, device and equipment. The method comprises the steps of obtaining a target performance test requirement; analyzing the target performance test requirement to generate at least one target test parameter; generating a target test scheme corresponding to the at least one target test parameter, wherein the target test scheme comprises one or more combinations of a light source starting process, a light source brightness adjusting process, a light source position adjusting process, a target test board position adjusting process and a data processing process; and controlling the corresponding light source and / or the target test board according to the target test process, acquiring an end face image of the optical fiber bundle and / or an imaging image of the target test board, and then carrying out data processing to generate a performance test result. According to the invention, various performance detection of the optical fiber bundle can be fully automatically completed, errors caused by naked eye detection are avoided, and meanwhile, the brightness of each light source is adjustable, so that the optical fiber bundle detection device adapts to optical fiber bundles with different lengths and different transmittances.

The invention discloses a multi-optical fiber bundle imaging mode dimension space conversion plasma spectrum analysis system, which is characterized in that a two-dimensional optical fiber array comprising M * N optical fiber micropores is arranged on an optical fiber area array, a one-dimensional optical fiber array comprising M * N optical fiber micropores is arranged on an optical fiber linear array, and an optical fiber surface is connected by adopting M * N optical fibers according to a preset connection relation, the two-dimensional optical fiber array is converted into the one-dimensional optical fiber array, the optical grating disperses light transmitted by the optical fiber linear array, then the light is focused by the imaging lens and then is subjected to optical imaging by the CCD detector, and the spectral data conversion module converts a spectral image into a spectral data graph of each optical fiber channel. According to one-to-one correspondence of optical fibers in the two-dimensional optical fiber area array and the one-dimensional optical fiber linear array, the distribution state of elements in the plasma is reconstructed, and multi-optical-fiber sample element content detection is achieved.

The present invention relates to an endoscopic probe for photoacoustic tomography of cavity side walls, characterized by comprising a hollow tubular probe housing with a closed front end; N acoustic wave receiving windows and M laser output windows formed on the side wall of the tubular probe housing; an array of linear laser output ports connected to a pluggable optical fiber connector via an optical fiber bundle; and an ultrasonic transducer array connected to a multi-channel signal connector via a signal harness. The present invention employs a method of arranging array transducers and array laser outputs on the side wall of the probe, eliminating the need for a reflector. The probe is less than 2 centimeters in size and can be placed in close proximity to the prostate through the rectum for photoacoustic imaging of the prostate, or in close proximity to the inner wall of the rectum for photoacoustic imaging of the inner wall of the rectum. The endoscopic probe provided by the present invention, combined with a photoacoustic imaging system host, utilizes photoacoustic endoscopic imaging technology to perform real-time transrectal prostate imaging and rectal imaging, achieving ideal imaging results.

The invention relates to the technical field of aero-engine combustion chamber performance testing, in particular to a three-dimensional chromatography testing system and method for the ignition process of an aero-engine combustion chamber. The device is characterized by comprising a guide rail arranged on the periphery of an igniter of a combustion chamber, a plurality of imaging units are arranged on the guide rail, each imaging unit is composed of an imaging lens, a flexible optical fiber bundle and a four-degree-of-freedom sliding block, a high-speed camera is arranged corresponding to the flexible optical fiber bundle, and the high-speed camera is connected with a synchronous controller through a signal line. And the synchronous controller is connected with the igniter through a signal line. By introducing the flexible optical fiber bundle and the synchronous controller, the number of the high-speed cameras is reduced to one, so that the test cost is reduced, the problem of synchronous control of the high-speed cameras and the igniter is solved, and the synchronism of the high-speed chromatographic measurement test bed to the ignition process is guaranteed. Meanwhile, the imaging lens can be placed on the guide rail at any angle through the sliding block, and test operation is facilitated.

The present invention relates to a multispectrum endoscope and an endoscope system comprising same. The multispectrum endoscope of the present invention comprises: a first light source emitting infrared rays having a plurality of wavelengths; a plurality of multimode optical fibers for guiding the infrared rays emitted from the first light source toward a sample; a second light source emitting a visible ray; an optical fiber for guiding the visible ray emitted from the second light source toward the sample; a lens part for receiving a fluorescent signal emitted from the sample and a visible light signal reflected off the sample; and an optical fiber bundle for guiding the fluorescent signal and / or the visible light signal received by the lens part toward a multispectrum photodetector, wherein the optical fiber bundle is disposed so as to be surrounded by the plurality of multimode optical fibers, and the end portion of the multispectrum endoscope emitting the visible ray surrounds at least a portion of the plurality of multimode optical fibers.

The invention relates to the technical field of seismic exploration equipment, in particular to an optical fiber signal transmission seismic cable for seismic exploration. A power line, a twisted-pair shielding signal line and an optical fiber beam tube are wrapped outside the high-pressure plastic composite hose in a cabling mode, and the power line, the twisted-pair shielding signal line and the optical fiber beam tube jointly form a cable core structure. An outer layer non-woven fabric is wrapped outside the cable core structure, a polyurethane inner sheath is extruded outside the outer layer non-woven fabric, an armor layer is wrapped outside the polyurethane inner sheath, and a polymer polyethylene sheath is extruded outside the armor layer. According to the high-pressure plastic composite hose, through the design of the double reinforcing layers of the Kevlar aramid fibers and the polyester fibers, the strength and bursting pressure of the central air pipe are remarkably improved, and the high-pressure plastic composite hose can better adapt to the complex working environment; the cable core structure adopts composite optical fiber analog signal transmission to replace a traditional digital signal seismic cable, so that the quality and efficiency of signal transmission are improved; and the armor layer adopts a double-layer steel wire armor structure, so that the overall mechanical strength and tensile property of the cable are improved.

Fibre optic cables (100), for use in a data communications network are adapted to be laid, along at least part of their length within a pipe (or conduit) (1) carrying a fluid and comprise fibres adapted for sensing the condition within or in the vicinity of the pipe (1). The cables (100) comprise one or more data fibre bundles (11) and armour (32) in the form of a layer of protective wires provided around the data fibre bundles (11). The cable (100) is additionally provided with outer sensing fibres (14) which replace one or more wires in the armour (32). The cables (100) are optionally adapted to remain stably positioned in the invert (2) of the pipe (1) by suitable selection of stiffness and relative density compared to the fluid and / or the provision of surface formations to reduce lift and / or drag forces experienced by the cable as a result of fluid flow.

The utility model relates to an optical fiber beam combiner. The device mainly comprises an input optical fiber 1 and an output bare fiber 2, one end of the input optical fiber 1 is provided with a fused biconical taper optical fiber bundle 3, and the input optical fiber 1 is connected with the output bare fiber 2 through the fused biconical taper optical fiber bundle 3; a first glass sleeve 4 is arranged on the input optical fiber 1, a tube shearing gap 100 is formed between the first glass sleeve 4 and the fused biconical taper optical fiber bundle 3, and a reflecting mirror 6 is arranged at one end, far away from the fused biconical taper optical fiber bundle 3, of the tube shearing gap 100; the output bare fiber 2 is provided with a pumping waste light filtering device 7 used for filtering out pumping waste light exceeding the outer cladding NA of the output bare fiber 2. According to the utility model, the heating problem of the high-power pumping beam combiner can be solved, and cladding light can be selectively filtered.

The invention relates to the field of optical fiber and cable equipment, and discloses an ultrahigh-density optical fiber ribbon core wire and a production method thereof, an optical fiber bundle of the ultrahigh-density optical fiber ribbon core wire is a regular triangular optical fiber bundle composed of optical fibers with different chromatograms, a filling rope is arranged in a middle hole of the regular triangular optical fiber bundle, and the middle hole is coated with a first layer of silicone oil lubricant; the outer surface of the regular triangular optical fiber bundle is coated with a first layer of acrylic resin, and the surface of the first layer of acrylic resin is coated with a second layer of silicone oil lubricant; and a second layer of colored acrylic resin is coated on the surface of the second layer of silicone oil lubricant. According to the production method of the optical fiber ribbon core wire, through the steps of regular triangle arrangement, primary curing, secondary curing and ribbon forming, optical fiber convergence can be achieved, the density of the combined fiber core of the optical fiber core wire is high, the capacity bottleneck of a traditional optical cable is solved, the combined strength of the optical fiber core wire is high, the application scene is wider, and the service life is longer.

The invention discloses a fluorescent confocal microscopic endoscopic imaging lens, which comprises three groups of doublet lenses, specifically comprising a first lens group, a second lens group and a third lens group, the first lens group comprises a plano-concave lens and a first biconvex lens which are sequentially arranged from an object space side to an image space side, and the second lens group comprises a plano-concave lens and a second biconvex lens which are sequentially arranged from an object space side to an image space side; the detector is used for collecting fluorescence signals emitted by an object space and adjusting light angles; the second lens group comprises a first negative meniscus lens and a second biconvex lens, and is used for relaying transmission light and balancing aberration so as to gently transition a light angle; and the third lens group comprises a second negative meniscus lens and a positive meniscus lens and is used for focusing the light to the end face of the optical fiber bundle. The lens is compact in structure, reasonable in light path matching and suitable for human tissue close imaging scenes, has the advantages of being high in resolution, low in distortion, excellent in chromatic aberration control and the like, and is suitable for digestive tract early cancer diagnosis and confocal imaging system integration.

The invention discloses a laser deicing method and device based on ice layer thickness and surface state recognition, belongs to the technical field of fan blade deicing, and aims to solve the problems of low efficiency, large energy loss and high blade damage risk caused by incapability of accurately sensing the ice layer state in the conventional fan blade laser deicing technology. The system comprises an active sensing module and a laser clearing module. The active sensing module measures the thickness and the surface state of an ice layer through infrared laser, and performs multi-dimensional monitoring in combination with a laser radar, a camera and a thermal infrared imager. And the laser clearing module dynamically adjusts laser parameters for deicing according to the sensing result. According to the invention, a non-contact ice thickness measurement method based on infrared laser and a surface state identification method based on relative illumination intensity are created for the first time, and accurate sensing of the ice layer state is realized. A laser and a power supply are fully integrated in the unmanned aerial vehicle, the constraint of a ground platform and optical fibers is eliminated, and the deicing task of the fan blade is accurately completed.

A coherent fiber optic bundle breakout cable assembly includes a trunk fiber bundle having a plurality of optical fibers in a close-packed 2D array at a trunk connector end face, and multiple breakout bundles emanating from the trunk fiber bundle and each including a group of optical fibers in a close-packed 2D array at a breakout connector end face, with optical fibers being in lateral contact with one another. Bonding material is arranged in interstitial spaces of optical fibers near ends of each breakout bundle. A method for fabricating such an assembly includes holding the plurality of optical fibers within an elastomeric fixture, dicing the plurality of fibers to provide diced ends thereof, selectively applying and curing bonding material in interstitial spaces between optical fibers proximate to the diced ends according to a bundle-forming pattern, separating groups of optical fibers into breakout bundles, and retaining each breakout bundle in a corresponding breakout bundle ferrule aperture of one or more breakout bundle ferrules.

A near-wall velocimetry probe includes a probe body configured for flush mounting on a surface, at least one tracer source mounted to or integrated within the probe body, at least one fiber bundle mounted to or integrated within the probe body, and at least one detector optically coupled to the at least one fiber bundle. The at least one fiber bundle is configured to capture optical signals from the tracers. The probe may include an illumination source embedded within the probe body and optical filters coupled to the fiber bundle. Methods for measuring near-wall flow velocity using the probe and systems for near-wall velocimetry are also provided.

The application provides a photoacoustic endoscope and an endoscope system. The photoacoustic endoscope comprises a light guide part, an operation part and an insertion part, a fiber bundle extends from the light guide part to a head end part at the distal end of the insertion part via the operation part, the fiber bundle comprises a main trunk section, a first branch section and a second branch section, the photoacoustic endoscope further comprises a joint assembly, the joint assembly comprises a main trunk joint, a first branch joint and a second branch joint which are independently and detachably connected to the main trunk joint, the proximal end of the main trunk section is optically coupled to a light guide interface on the light guide part, the distal end of the main trunk section is connected to the main trunk joint, the proximal end of the first branch section is connected to the first branch joint, the proximal end of the second branch section is connected to the second branch joint, the distal ends of the first branch section and the second branch section are both fixed to the head end part, and the distal end of the main trunk section is optically coupled to the proximal ends of the first branch section and the second branch section. Such a photoacoustic endoscope can be conveniently disassembled, repaired or replaced when returned for repair, has better maintainability and better user experience.

The invention discloses an automobile flexible luminescent material and a preparation method thereof, and relates to the technical field of automobile interiors. The light-emitting decorative fabric comprises a decorative layer, a light-transmitting fabric layer, a light-emitting fabric layer and a flexible substrate layer which are sequentially bonded through glue from outside to inside, the light-emitting fabric layer is formed by interweaving a plurality of warp yarns and weft yarns, the weft yarns are polymer optical fibers, at least one end of each weft yarn penetrates through an optical fiber bundling pipe and then is connected to a light source, and the light-transmitting fabric layer is connected to the flexible substrate layer. The warp yarn is divided into a plurality of adjacent tension adjusting areas in the length direction of the weft yarn, and the tension of the adjacent tension adjusting areas is gradually increased according to the distance between the adjacent tension adjusting areas and the light source from small to large; the tension of the adjacent tension adjusting areas is controlled to be gradually increased according to the distance between the light source and the tension adjusting areas from small to large, so that the light emitting uniformity of the light emitting fabric is improved.

The application discloses a manufacturing process of a quartz optical fiber image transmission bundle, which comprises a threading plate and a straight line chuck, a plurality of threading holes are formed on the surface of the threading plate, the plurality of threading holes are arranged in a honeycomb shape, a quartz optical fiber is first perforated to form a threading-out section; glue is dropped on the threading-out section to obtain a first shaped clamping end; the optical fiber is pulled out in parallel until a required length is reached to obtain an optical fiber arrangement bundle, then glue is again dropped on the optical fiber on the back side of the threading plate, and a second shaped clamping end is obtained after solidification; the second shaped clamping end is cut to obtain an optical fiber arrangement section with a third shaped clamping end, and the optical fiber arrangement section is immersed in sulfuric acid to remove the coating layer on the surface of the optical fiber; then the first shaped clamping end and the third shaped clamping end are twisted and glue is dropped, the first shaped clamping end and the third shaped clamping end are cut off after solidification, and the finished product is obtained after grinding and polishing. The application breaks through the blockade of the prior art to prepare the quartz optical fiber bundle, has low cost and is easy to produce.

The utility model discloses an integrated two -dimensional optical fiber array module, include: fixed base, be equipped with the assembly recess on the fixed base, the optical fiber fixed base piece of card embedding fixed in the assembly recess, the optical fiber fixed base piece is made by glass material and adopts laser processing, be equipped with a plurality of through arrangement and array distribution's optical fiber fixed hole on the optical fiber fixed base piece, and the one side of optical fiber fixed hole is equipped with the guide mouth, and, optical fiber group, optical fiber group includes a plurality of optical fiber bundles, and the front end of optical fiber bundle is from the guide mouth and enters the optical fiber fixed hole, and fills with the glue solid layer in the guide mouth and the optical fiber fixed hole to fix optical fiber bundle, by adopting the optical fiber fixed base piece made of glass material to replace the multilayer single crystal silicon base piece, on one hand manufacturing cost project, and the processing assembly process is simpler, and thus production efficiency is higher, on the other hand can eliminate multilayer single crystal silicon base piece after assembling and appear corresponding precision error, has improved the optical fiber direction precision.

This invention relates to the field of water radiance measurement technology, and particularly to an enhanced water radiance sensor based on a polarizing filter. The sensor comprises a polarizing filter, a Kohler illumination system, a shaping fiber bundle, a spectrometer, and a host computer, arranged sequentially. The polarizing filter is positioned at a preset position at the front end of the optical path of the Kohler illumination system, which converts natural light from the water surface into a uniform and controllable light source. The incident end of the shaping fiber bundle is connected to the Kohler illumination system, and the exit end is connected to the spectrometer. The spectrometer is connected to the host computer. The water radiance passes sequentially through the polarizing filter, the Kohler illumination system, and the shaping fiber bundle before entering the spectrometer. The spectrometer converts the received optical signal into an electrical signal and transmits it to the host computer. The advantage of this invention is that by employing the Kohler illumination system, the field of view of the enhanced water radiance sensor is reduced to ±2°, solving the problem of poor glare suppression under large field of view in traditional sensors.

This application relates to a multi-channel fiber optic image transmission device, which belongs to the field of fiber optic image transmission. It includes an image input fiber bundle, an image processing relay, and an image output fiber bundle. Multiple image input fiber bundles are provided. The image output fiber bundle and the multiple image input fiber bundles are respectively connected to the image processing relay. The image processing relay includes an input reflector and an image combining mirror. Multiple input reflectors are provided, and each input reflector is respectively positioned opposite to the multiple image input fiber bundles. These reflectors can reflect the images introduced by the multiple image input fiber bundles to the image combining mirror. The image combining mirror is positioned opposite to the image output fiber bundle, and can combine the images reflected by the input reflectors and then illuminate the image output fiber bundle. This allows for the acquisition of combined images from different locations in a distant region, ensuring the quality of the combined image.

The present application relates to the technical field of furniture detection, and relates to a device for detecting the smoothness of the inner wall of a hole in solid wood furniture, comprising a support and a detection unit, the support being used for arranging and adjusting the direction and angle of the detection unit, the detection unit comprising a fiber bundle probe and a main component, the fiber bundle probe being used for emitting light and receiving reflected light of the inner wall of the hole in the solid wood furniture to detect the smoothness, the fiber bundle probe comprising one emitting fiber and a plurality of receiving fibers, the emitting fiber being located at the center and the plurality of receiving fibers being uniformly distributed around the emitting fiber; the main component being connected with the fiber bundle probe and being used for providing a light source and processing reflected light signals, the main component comprising a laser diode, a programmable laser drive circuit, a MEMS micromirror array, a photodiode array and a microprocessor, the present application realizes non-contact detection through emitting and receiving light, completely avoids physical damage to the hole wall of the wood, and is particularly suitable for quality control of high-grade solid wood furniture.

The utility model provides a double-color ultra-miniature microscopic imaging system, which solves the problem that the accuracy and effectiveness of data cannot be judged by the existing single-color fluorescence recording, and adopts the main scheme that the double-color ultra-miniature microscopic imaging system comprises a video acquisition card, a double-color ultra-miniature microscopic imaging mirror body, a multi-core optical fiber bundle, an LED (light-emitting diode) driving circuit, a digital signal acquisition card and a switching power supply, the video acquisition card is electrically connected with the LED driving circuit and can be communicated with computer acquisition software to distinguish odd frames and even frames by taking image frames as units and synchronously control corresponding light source signals, and the double-color ultra-miniature microscopic imaging mirror body is used for emitting two excitation lights and collecting and imaging fluorescence models. The multi-core optical fiber bundle is used for coupling two kinds of exciting light into a light source and connecting the light source to the two-color ultra-miniature microscopic imaging mirror body, and the LED driving circuit is used for receiving a control signal of the video acquisition card so as to realize synchronization of on-off of the exciting light and image frames.

The application discloses a fouling detection device and method based on photoacoustic imaging, wherein the detection device comprises: a sealed cover with at least one transparent surface; a photoacoustic excitation module comprising a laser, an optical fiber bundle and a plurality of micro-fiber collimators; the micro-fiber collimators are integrated in the transparent surface and used for irradiating laser outside the transparent surface to generate a photoacoustic signal; a photoacoustic collection module arranged along the propagation direction of the photoacoustic signal and used for collecting the photoacoustic signal; and a data processing module in communication connection with the photoacoustic collection module and used for calculating the fouling degree outside the transparent surface according to the collected photoacoustic signal. The application adopts nanosecond-level light pulses to improve the detection accuracy; and the laser sequentially traverses the optical fiber, so that the position of fouling can be accurately located, and a reliable basis is provided for fouling removal.

A fiber optic device and method for uniform illumination of biological samples distributed over one or more microcell arrays of a microwell plate can establish more reliable polymerase chain reaction (PCR) data sampling. In some embodiments, the apparatus includes a light engine that emits a light beam captured by a fiber optic bundle for delivering one or more light beams to each microchamber; each light beam thereby fluoresces the biological sample. The fiber optic cable of the fiber optic bundle comprises a distal output end held in place using a mechanical support for flexibly aligning the output beam of the distal output end to be arranged such that the center of the output beam is directed to different locations in the one or more microcell arrays, wherein each of adjacent ones of the output beams partially overlaps so that the light distribution is uniform.

The present invention relates to the technical field of three-phase flow detection, and provides a fluorescent fiber optic probe device for three-phase flow detection, comprising: a packaging shell; a sapphire probe disposed within the packaging shell; a connected small-diameter self-focusing lens and a large-diameter self-focusing lens located above the sapphire probe; an integrated fiber bundle structure divided into a transmitting fiber and a receiving fiber within a main cavity; a laser transmitting module connected to the transmitting fiber; a collimating lens located above the receiving fiber; a trapezoidal waveguide structure located above the collimating lens; a first optical focusing assembly and a second optical focusing assembly disposed side by side above the trapezoidal waveguide structure, with a reflective volume holographic grating disposed below the first optical focusing assembly; a first photoelectric conversion module and a second photoelectric conversion module; and a main control module. The device of the present invention can effectively avoid optical power attenuation caused by optical fiber splitting and filters, thereby ensuring optical signal transmission efficiency and detection accuracy.

The invention discloses a three-dimensional measurement device and method for optical signals in an optical engine cylinder based on a three-dimensional chromatography method, and belongs to the technical field of combustion diagnosis and optical testing of internal combustion engines. The control acquisition system is respectively matched with the first high-speed camera and the second high-speed camera to finish acquisition of output signals, transmits the acquired data to the control acquisition system, and finally obtains instantaneous three-dimensional distribution of optical signals in the cylinder through three-dimensional reconstruction; according to the three-dimensional measurement device and method for the optical signals in the optical engine cylinder based on the three-dimensional chromatography, projection data of the optical signals in the cylinder are synchronously obtained through a plurality of side cylinder wall visual angles and a bottom surface visual angle, and three-dimensional distribution of the optical signals in the cylinder is reconstructed by utilizing a three-dimensional chromatography algorithm, so that the spatial resolution is improved, and the measurement accuracy is improved. The measurement precision is enhanced, and accurate combustion process analysis is realized in a high-temperature and high-pressure environment.

The invention relates to the technical field of cables, solves the problem that an existing aerospace cable is insufficient in vibration fatigue resistance and high-energy radiation resistance, and particularly discloses a multi-layer shielding optical fiber composite aerospace cable and a preparation method thereof.The multi-layer shielding optical fiber composite aerospace cable comprises an insulating layer, an inner shielding layer, a buffer bonding layer and an outer shielding layer which are sequentially arranged from inside to outside; a conductor core and an optical fiber bundle are arranged in the insulating layer, and the insulating layer comprises a bonding transition layer, a core insulating layer and an anti-radiation protection layer from inside to outside; the inner shielding layer comprises a nano-silver conductive film and a silicone rubber elastic layer, and the nano-silver conductive film is arranged on the inner side of the silicone rubber elastic layer; the outer shielding layer is provided with a nickel-copper alloy wire woven mesh; and the buffer bonding layer is provided with a modified polyimide adhesive layer. According to the optical fiber composite aerospace cable and the preparation process thereof, the shielding, buffering and interlayer bonding performance of the cable is guaranteed through control over the inner shielding layer, the buffering bonding layer and related preparation parameters, and the optical fiber composite aerospace cable adapts to aerospace application requirements.

A fiber optic bundle for incorporation into a cable for use in a well. The bundle includes multiple fiber optic threads that are helically wound about one another at a zero degree lay angle for structural reinforcement. Further, the cable that employs the bundle may be coupled in nature and gas proof thereby rendering the fiber optics mechanically responsive for improved accuracy in detections during use in a well application.

The invention discloses an MEMS imaging pressure integrated sensing probe based on a meta ultra-thin lens and a processing method, the integrated sensing probe comprises an optical fiber bundle, a gasket and the meta ultra-thin lens after wet etching from bottom to top, the meta ultra-thin lens after wet etching comprises a metasurface and an ultra-thin substrate, and the ultra-thin substrate is used for realizing MEMS pressure sensing. The ultra-thin substrate of the metasurface lens is realized through a sacrificial layer removal process, and the diameter and the rigid length of the integrated probe meet the ultra-thin application requirement in combination with micro-scale cutting and integration.

A photoelectric converter sensitivity adjusting device and method, comprising a light source module, a shielding cage, an optical fiber bundle, an optical power meter, a power supply, a photoelectric converter and a voltmeter, the light source module is used to generate test light, one end of the shielding cage is provided with a small hole for receiving the test light, the other end is provided with an optical fiber bundle connector connected with the optical fiber bundle, the test light entering the shielding cage from the small hole enters one end of the optical fiber bundle from the optical fiber bundle connector, the optical power meter is used to test the optical power emitted from the other end of the optical fiber bundle, the photoelectric converter has an optical fiber bundle connector and an output signal line, the optical fiber bundle connector is used to be detachably connected to the other end of the optical fiber bundle, and the voltmeter tests the output voltage of the photoelectric converter; the photoelectric converter is provided with a sensitivity adjusting resistor, and the output voltage can be changed under the same light intensity excitation. The device can shield the interference of environmental light in ordinary experimental environment, accurately adjust the sensitivity of the photoelectric converter, and has the advantages of low cost, high detection efficiency and convenient operation.

The technologies described herein are generally directed to using a loopback component to test a single fiber optic strand. For example, a method described herein can include generating a first optical beam of a first wavelength. The method can further include transmitting the first optical beam via a fiber optic fiber. Further, the method can include receiving via the fiber optic fiber, a second optical beam of a second wavelength, with the second optical beam having a characteristic of the first optical beam, and with the second optical beam being generated by a non-electrical conversion of the first light of the first wavelength to the second light of the second wavelength.