285 results about "Buffer (optical fiber)" patented technology

The invention discloses a kilometer deep well roadway toughness regulation and control supporting system and a dynamic design method, and belongs to the field of deep well roadway supporting. The supporting system comprises a multi-layer collaborative structure and an intelligent regulation and control module, the multi-layer collaborative structure sequentially comprises a shape memory alloy energy absorption layer used for resisting impact loads and a gradient pore foam metal buffer layer used for energy grading dissipation from inside to outside, and the multi-layer collaborative structure is connected with roadway surrounding rock in an anchoring mode through an anchor rod anchoring structure; the intelligent regulation and control module comprises a distributed optical fiber sensor array used for monitoring surrounding environment signals of surrounding rock in real time, an electrostriction driver used for regulating and controlling the rigidity of the multi-layer cooperative structure and a multi-channel data fusion terminal used for achieving underground and surface data transmission synchronization. By the adoption of the kilometer deep well roadway toughness regulation and control supporting system and the dynamic design method, the problems that a traditional supporting mode is too high in material rigidity, lacks dynamic regulation and control capacity and is insufficient in impact toughness can be solved.

The invention provides a corrosion-resistant composite cable and a preparation method thereof, the corrosion-resistant composite cable comprises a signal unit, an optical cable unit and a protection unit, the signal unit and the optical cable unit are coated with the protection unit, the signal unit comprises a silver-plated copper conductor, an insulating layer, a shielding layer and a sheath layer, and the silver-plated copper conductor is coated with the insulating layer. The optical cable unit comprises an optical fiber, a buffer tube and a filler; the protection unit comprises an inner sheath, a tensile layer, an anti-corrosion layer and an outer sheath. The corrosion-resistant composite cable has good corrosion resistance, can effectively resist corrosion of various chemical substances, prolongs the service life of the cable, reduces the fault risk caused by corrosion, and improves the stability and reliability of power transmission or signal transmission; under severe environment conditions, such as high humidity, high salinity and high alkalinity, a normal working state can still be kept, continuous and stable support is provided for related equipment or systems, and normal operation of the equipment or systems is guaranteed.

Consistent with the present disclosure, an encoder circuit is provided at a transmit side of an optical fiber link that maps an input sequence of bits of fixed length k a sequence of symbols of a codeword of length n, such that the symbols of the codeword define a predetermined transmission probability distribution. Preferably, each symbol of the codeword is generated during a corresponding clock cycle, such that after n clock cycles, a complete codeword corresponding to the input bit sequence is output. On a receive end of the link, a decoder is provided that outputs the k-bit sequence every n clock cycles. Accordingly, buffers need not be provided at the output of the encoder and the input of the decoder, such that processing of the input sequence, codewords, and output sequence may be achieved efficiently without large buffers and complicated circuitry. Moreover, the input sequence, with any binary alphabet may be matched to a desired output distribution with any arbitrary alphabet. Accordingly, probabilistic constellation shaping may be achieved over constellations of arbitrary size. In addition, relatively long codewords, may be encoded and decoded with the apparatus and method disclosed herein. Accordingly, for a fixed SNR a higher SE (more bits per symbol) can be achieved. Alternatively, for a fixed SE, a lower SNR may be sufficient. Moreover, the resulting SE may be finely tailored to a particular optical link SNR to provide data transmission rates that are higher than the low order modulation formats that would otherwise be employed for optical signals carried by such links.

The utility model discloses an optical fiber cutting and clamping jig. The optical fiber cutting and clamping jig comprises an optical fiber limiting and placing bottom plate, an overturning and buckling gland and a buffering and pressing mechanism, a profiling groove used for placing the main body shell is formed in the middle of the optical fiber limiting and placing bottom plate, and the overturning and buckling gland is rotationally connected with the optical fiber limiting and placing bottom plate. The buffer pressing mechanism is arranged on the overturning buckling pressing cover and corresponds to the clamping groove structure, the buffer pressing mechanism comprises a pressing block, an installation block and an elastic piece, when the overturning buckling pressing cover rotates relative to the optical fiber limiting placement bottom plate, the pressing block abuts against and presses an optical fiber insertion core located in the clamping groove structure, and the elastic piece abuts against the optical fiber insertion core located in the clamping groove structure. The installation block buffers stress in the rotation direction by extruding or stretching the elastic piece so that the position of the pressing block relative to the optical fiber ferrule is not changed, the situation that the optical fiber ferrule is driven by the stress in the rotation direction to generate dislocation deviation is avoided, and larger pressure can be applied to clamp the optical fiber ferrule.

The invention provides a heterogeneous integrated sub-wavelength structure end face coupler adaptive to a single-mode optical fiber and a preparation method of the heterogeneous integrated sub-wavelength structure end face coupler, and relates to the technical field of integrated optics. The coupler comprises a substrate, an insulating layer, a waveguide layer and a cladding from bottom to top. The waveguide layer comprises an upper lithium niobate ridge waveguide and a lower lithium niobate ridge waveguide, the lower waveguide is wider than the upper waveguide, and the upper waveguide is used for connecting an external waveguide; the heterogeneous integrated coupling region comprises a silicon nitride strip conical waveguide which forms directional coupling with the lower-layer lithium niobate waveguide, so that adiabatic transfer of a light field is realized; the sub-wavelength grating regulation and control region sequentially comprises a silicon nitride tapered waveguide and sub-wavelength grating combination section, a width gradually-changing grating section and an equal-width buffer grating section. The whole structure is symmetrical about the central axis. Through the multi-section adiabatic transformation and heterogeneous integration design, efficient expansion of a mode field is achieved, the coupling efficiency with a single-mode fiber is improved, and the advantages of being insensitive to polarization, good in process compatibility and suitable for high-density integration are achieved.

The embodiment of the invention provides a signal cable, a signal monitoring system and a signal monitoring method. The signal cable comprises a plurality of conductors, a plurality of insulators, an optical fiber sensing layer, a pressure-resistant buffer layer, a shielding layer and an outer sheath layer, wherein each conductor is wrapped with one insulator, and the plurality of insulators are included in the optical fiber sensing layer; a first single-mode optical fiber, a second single-mode optical fiber and a multimode optical fiber are arranged in the optical fiber sensing layer, and the first single-mode optical fiber, the second single-mode optical fiber and the multimode optical fiber are circumferentially arranged in the optical fiber sensing layer; the compression-resistant buffer layer is wrapped on the optical fiber sensing layer, the shielding layer is wrapped on the compression-resistant buffer layer, and the outer sheath layer is wrapped on the shielding layer. Through cooperation and distributed sensing of multiple optical fibers in the optical fiber sensing layer, the transmission precision and distance of cable signals are effectively improved, and the safety and reliability are improved.

The invention discloses a halogen-free low-smoke optical cable communication cable, and relates to the technical field of communication cables, the halogen-free low-smoke optical cable communication cable comprises an optical fiber assembly, a communication assembly is arranged on the outer surface of the optical fiber assembly, and a chemical protection assembly is arranged on the outer surface of the communication assembly. According to the halogen-free low-smoke optical cable communication cable, in order to enhance the mechanical strength of the cable, the protective sleeve can improve the impact resistance of the cable, the thin steel layer can provide mechanical strength for the cable, the armor layer on the outer layer is used for resisting external corrosion, and the smoke suppression layer additionally arranged between the armor layer and the thin steel layer can reduce smoke generated when the cable burns; the glass fiber layer is an important reinforcing and protecting structure in the cable, the buffer layer prevents the optical fibers from being broken and the conductors from being deformed, and when the cable is subjected to external impact force, lubricating oil stored in an oil tank flows into the surface of the armor layer and permeates into the outer surface of the thin steel layer through the smoke suppression layer. The cable has an effective protection effect on mechanical strength resistant components in the cable, and the outermost wear-resistant layer depends on certain rigidity and toughness.

The present disclosure provides a hybrid optical fiber comprising a hollow core fiber section having a first end and a second end, one or more end fiber sections coupled to at least one end of the hollow core fiber section, and optionally a buffer tube encapsulating at least the hollow core fiber section. A hybrid optical cable may include a sheathing and two or more such hybrid optical fibers. Methods may include fabricating hybrid optical fibers by coupling glass core fiber sections to hollow core fiber sections, winding on a reel, and testing. Another method may involve installing and coupling hybrid optical fibers based on inspection results. The hollow core fiber sections may comprise various designs including anti-resonant, photonic bandgap, or nested structures.

The invention provides a welding-free redundancy-free optical fiber distribution box, and the distribution box comprises a housing which is provided with a drawing groove, one side of the drawing groove is provided with an opening, and the other side, opposite to the opening, of the drawing groove is provided with a buffer part; the optical fiber is arranged in the drawing box, and the drawing box slides in the drawing groove and can at least partially slide out of the opening; a connector fixing groove is formed in the end, facing the buffer piece, of the drawing box, and an optical fiber connector is connected to the end of the optical fiber and fixed to the connector fixing groove; the optical fiber adapter is connected with the optical fiber connector in an inserted mode, supporting plates are arranged on the two sides of the optical fiber adapter, and the supporting plates abut against the buffering pieces; and the tail fiber joint is inserted into the other end, opposite to the optical fiber connector, of the optical fiber adapter. According to the invention, the problems that the optical fiber is fixed in a welding manner, the expansibility is poor, and a redundant link is required to be arranged, so that the link structure of the distribution box is complicated and the size is large are solved.

The invention discloses a special optical cable, a preparation method and sensing equipment with the special optical cable, the special optical cable comprises an optical fiber body, a high-temperature-resistant coating layer, a primary buffer layer, a secondary buffer layer, a reinforcer layer and a sheath layer which are sequentially arranged from inside to outside, and the high-temperature-resistant coating layer comprises an inner layer, a transition layer and an outer layer which are sequentially arranged from inside to outside. By designing the transition layer, efficient combination of the inner layer and the outer layer is achieved, the layering problem is avoided, and the high temperature resistance, bending resistance, compression resistance and other performance of the optical cable are remarkably improved; the special optical cable has the advantages of light weight, high temperature resistance, fast heat conduction, strong electric field and strong magnetic field environment resistance, bending resistance, compression resistance, high heat sensitivity, high mechanical property, high wear resistance, flame retardance, radiation resistance, corrosion resistance and the like, and is suitable for being applied to structural health monitoring equipment with anti-electromagnetic interference. The temperature, vibration and other parameters of the surface structure of an object or a material are monitored and stored, and the system serves for structural health monitoring and data storage of an aircraft in a flight environment.

Optical fibers are disposed within v-grooves of an optical fiber attachment region of a photonic integrated chip (PIC). A structural adhesive is disposed over a first portion of the optical fibers within the optical fiber attachment region of the PIC without being disposed over a second portion of the optical fibers within the optical fiber attachment region of the PIC. An optical index matching adhesive is disposed over the second portion of the optical fibers within the optical fiber attachment region of the PIC. A buffer structure is disposed on the structural adhesive and the optical index matching adhesive as they are cured. The buffer structure is removed. The optical fibers, the structural adhesive, and the optical index matching adhesive have a collective vertical height above a top surface of the PIC that is less than a vertical height of flip-chip attachment structures on the top surface of the PIC.

The invention relates to the technical field of cables, in particular to a strong-acid-resistant and high-temperature-resistant silicone rubber cable and a processing technology thereof.The strong-acid-resistant and high-temperature-resistant silicone rubber cable sequentially comprises a multi-core insulating wire core, a filling layer, a cabling cable core wrapping tape, a shielding layer, an optical fiber unit, a buffer layer, a fluorocarbon protective layer and a corrosion-resistant and high-temperature-resistant sheath layer from inside to outside. Through the multi-layer protection design of the conductor anticorrosion priming coat, the insulating layer fluorosilicone resin protection layer, the filling layer-wrapping tape-buffer layer ceramic silicone rubber synergistic protection, the hydrophobic anti-permeation interlayer and the sheath layer acid-resistant filler, a compact acid-resistant protection system is formed, the cable is soaked in sulfuric acid / hydrochloric acid with the concentration of 50% and the temperature of 250 DEG C for 720 h, and the cable has the good anti-corrosion performance. The sheath layer and the wrapping tape do not crack, swell or fall off, the insulation performance is not obviously reduced, the problem that an existing cable is prone to aging and damage under strong acid is solved, double corrosion prevention of the conductor is achieved, and strong acid corrosion is thoroughly avoided.

The invention discloses a high-flame-retardant temperature-resistant corrosion-resistant optical fiber composite cable and a preparation method thereof, and belongs to the technical field of cable manufacturing, and the high-flame-retardant temperature-resistant corrosion-resistant optical fiber composite cable sequentially comprises an optical fiber unit, a conductor layer, an insulating layer, a shielding layer, a corrosion-resistant layer and a sheath layer from inside to outside. The optical fiber unit adopts a ceramic silicone rubber buffer layer; the conductor layer is a nickel-plated copper alloy stranded wire, and the oxidation resistance is enhanced through nano titanium dioxide sol treatment; the insulating layer is of a three-layer co-extrusion structure; the shielding layer adopts an aluminum-plastic composite belt and tinned copper wire braided composite structure; the anti-corrosion layer is a polytetrafluoroethylene film subjected to plasma treatment; the sheath layer is made of two-component ceramic silicone rubber, is flexible after being vulcanized at normal temperature, and is converted into a ceramic body at high temperature. According to the optical fiber composite cable, through the collaborative design of a multi-layer structure, the performance of excellent continuous use stability, high salt mist environment corrosion resistance and the like is achieved, the optical fiber composite cable is suitable for high-temperature, corrosion, fire and other severe environments, and the safety and durability of the composite cable are remarkably improved.

The invention provides an STM32-based anaerobic fermentation biogas slurry near infrared transmission spectrum data on-line acquisition device. The device comprises a backwashing anti-blocking biogas slurry filtering system and an on-line liquid near infrared spectrum acquisition system, according to the system, a three-stage filtering mechanism is adopted, an STM32 microcontroller is taken as a core, a miniature optical fiber spectrometer and a halogen tungsten lamp light source are integrated to construct a compact transmission light path, and solid particles in biogas slurry are effectively removed by combining a backwashing anti-blocking T-shaped three-way filter, a double-buffer-bottle liquid level control mechanism and a PID liquid level control strategy; the cavitation phenomenon of a biogas slurry sampling pipeline is inhibited, the stability of sample conveying and the repeatability of spectrum collection are remarkably improved, and an efficient and portable online detection solution is provided for anaerobic fermentation process control; reliable hardware support is provided for application of a near infrared spectrum detection technology in a complex anaerobic fermentation environment.

The utility model relates to an anti-fracture flexible optical fiber protective sleeve, which belongs to the technical field of protective sleeves, and comprises a wear-resistant sleeve, a connecting assembly is arranged at the end part of the wear-resistant sleeve, an optical fiber is arranged in the wear-resistant sleeve, a buffer assembly is fixedly connected in the wear-resistant sleeve, and the buffer assembly is fixedly connected with the wear-resistant sleeve. A protection assembly is fixedly connected into the wear-resisting sleeve, a hollow spring is fixedly connected into the wear-resisting sleeve, and the hollow spring is arranged between the buffering assembly and the protection assembly. According to the utility model, the rubber ball, the hollow spring and the protective ring are used in cooperation, and when an optical fiber encounters a corner part in the installation process, extrusion force generated by bending of the optical fiber at the corner part can be absorbed by using deformation of the rubber ball, deformation of the hollow spring and deformation support of the protective ring; the optical fiber is prevented from being broken when being bent at the corner, normal signal transmission of the optical fiber is ensured, and the service life of the optical fiber is prolonged.

The utility model relates to a bending-resistant and low-temperature-resistant plastic optical fiber cable, which comprises a stretch-resistant wire core, a plurality of optical fiber wire cores are fixed on the outer surface of the stretch-resistant wire core, and a protection mechanism for improving the protection capability of the optical fiber wire cores is arranged on the outer side of the optical fiber wire cores; the protection mechanism comprises an inner protection layer arranged on the outer side of the optical fiber cable core, a buffer layer is arranged on the outer side of the inner protection layer, a waterproof layer is arranged on the outer side of the buffer layer, a low-temperature-resistant layer is arranged on the outer side of the waterproof layer, and a tensile layer is arranged on the outer side of the low-temperature-resistant layer. According to the bending-resistant and low-temperature-resistant plastic optical fiber cable, the protection mechanisms are arranged on the outer surfaces of the tensile wire cores and the optical fiber wire cores, so that the plastic optical fiber cable has the functions of buffer protection, water resistance, low temperature resistance, tensile resistance, corrosion resistance and wear resistance, and the service life of the plastic optical fiber cable is protected; and the influence on the use experience of a user caused by signal attenuation at low temperature is avoided.

A low-loss, high-strength specialty optical fiber comprises a fiber core, a cladding disposed on the surface of the fiber core, and a coating layer covering the cladding. A base protective layer is fixedly sleeved around the circumference of the coating layer. A plurality of reinforcing protection strips uniformly distributed along the circumference of the fiber core are fixedly connected to the circumference of the base protective layer. The reinforcing protection strips are parallel to the fiber core, and a deformation space is formed between two adjacent reinforcing protection strips. A ring surrounds all the reinforcing protection strips. A plurality of buffer components are fixedly connected to the inner sidewall of the ring. The buffer components extend into the deformation space in a one-to-one correspondence. The present invention provides a low-loss, high-strength specialty optical fiber with higher strength and impact resistance, and can avoid localized micro-bending and loss.

The invention discloses a cone-ball coupled cavity photoacoustic gas sensor for detecting acetylene dissolved in transformer oil, relates to the field of testing or analyzing materials by using an optical means, and solves the problem that miniaturization and high sensitivity of an existing photoacoustic sensor are difficult to consider at the same time. An optical fiber collimator is arranged at one end of the shell, a sonic sensor is arranged at the other end of the shell, a buffer cavity, a first resonant cavity and a second resonant cavity are sequentially arranged in the shell between the optical fiber collimator and the sonic sensor, the end of the optical fiber collimator is located in the buffer cavity, and the center lines of the optical fiber collimator, the buffer cavity, the resonant cavities and the sonic sensor coincide. The buffer cavity is cylindrical, an air inlet and an air outlet are formed in the side wall of the buffer cavity, the first resonant cavity is in a circular truncated cone shape, and the second resonant cavity is in a segment shape. The buffer cavity, the first resonant cavity and the second resonant cavity are coupled to form a cylindrical-conical-spherical coupled cavity, so that limitation and focusing of acoustic energy are realized, and the amplitude of a photoacoustic signal is enhanced.

The present disclosure provides a micro sheath buffer tube with rollable optical fiber ribbons for optical fiber cable to reduce the overall cable diameter. The buffer tube indicates one or more subunits, a micro sheath layer and a plurality of water swellable yarns. The one or more subunits encloses a plurality of optical fiber ribbons. Each optical fiber ribbon of the plurality of optical fiber ribbons includes 12 optical fibers. Further, each of a plurality of optical fibers is a colored optical fiber. In addition, the micro sheath layer surrounds the one or more subunits. Furthermore, the one or more subunits has a coating layer of low smoke zero halogen material.

The invention provides a biological safe and efficient fattening field, and belongs to the technical field of livestock breeding. A negative pressure isolation belt is formed by the outer shell and the inner shell, so that external air is forced to flow through the visible light catalysis quantum dot layer to realize pathogen inactivation while the gas flow rate is controlled. An optical fiber sensing siphon is arranged below the slatted floor to monitor sewage pathogenic bacteria in real time. Live pigs enter the house through the third-stage buffer channel. The system breaks through the limitation of a traditional physical barrier, full-path blocking of a transmission chain of epidemic diseases such as African swine fever is achieved, and the biological safety level is improved by two orders of magnitude.

The utility model discloses an optical fiber drawing coating die through hole tool, which comprises a die through hole guider through hole needle and a die, the top of the small end of the die through hole guider is provided with a through hole needle precise through hole, and the through hole needle is in precise sliding fit with the through hole needle precise through hole of the die through hole guider. The die is installed through an inner hole at the large end of the die through hole guider, is in precise sliding fit with the inner hole and is provided with a positioning structure, so that accurate and stable installation is ensured, a through hole needle is inserted through a through hole needle precise through hole at the top of the small end of the die through hole guider, is in precise sliding fit with the guider and is assisted by a needle hole guide sleeve, and die orifice optical fibers can be automatically and accurately aligned; the alignment accuracy and the knocking fixity are improved, the production efficiency is improved, meanwhile, the accurate positioning structure prevents the die orifice from being damaged due to alignment deviation and knocking deviation, the elastic buffer structure prevents the through hole from damaging the die, the die damage risk is greatly reduced, the die loss is reduced, the production cost is saved, and considerable economic benefits are created for optical fiber production enterprises.

The present invention discloses a special optical cable, a preparation method and a sensing device having the same. The special optical cable includes an optical fiber body, a high-temperature resistant coating layer, a primary buffer layer, a secondary buffer layer, a reinforcement layer and a sheath layer arranged in sequence from the inside to the outside. The high-temperature resistant coating layer includes an inner layer, a transition layer and an outer layer arranged in sequence from the inside to the outside. The present invention achieves efficient combination of the inner layer and the outer layer by designing a transition layer, avoids the delamination problem, and achieves significant improvement in the high-temperature resistance, bending and compression resistance and other properties of the optical cable; the special optical cable has many excellent properties such as light weight, high-temperature resistance, fast thermal conductivity, resistance to strong electric and magnetic fields, bending and compression resistance, high thermal sensitivity, high mechanical properties, high wear resistance, flame retardancy, radiation resistance, corrosion resistance, etc., and is suitable for use in structural health monitoring equipment that is resistant to electromagnetic interference, and realizes monitoring and storage of parameters such as temperature and vibration of the surface structure of an object or material, and serves in structural health monitoring and data storage of aircraft in a flight environment.

The invention relates to the technical field of optical fiber adapters, in particular to a single-mode optical fiber adaptive connection protection structure of an SLD depolarization light source. The optical fiber adapter comprises an optical fiber adapter body and further comprises a protection tensile mechanism used for conducting overheating protection on the optical fiber adapter body and buffering when the optical fiber adapter body is stretched by external force. An outer connector is inserted into an outer connector, air bags I are extruded when the outer connector is inserted, so that air in the air bags I flows into an air bag II, the air bag II drives a limiting rod, clamping blocks I and an adjusting rod to vertically move through the interior of a driving block, and the two clamping blocks I are attached to a connecting line; the magnetic blocks fixedly installed in the two first clamping blocks provide magnetic force for auxiliary fixation, and the two second clamping blocks are clamped in the reserved grooves formed in the surface of the outer connector, so that the tensile resistance of the connection position of the optical fiber adapter is further improved, disconnection of the outer connector and the outer interface caused by external force is avoided, and the service life of the optical fiber adapter is prolonged. And the use stability of the optical fiber adapter is improved.

1. Name of the product in this design: Fiber Optic Hot Stripping Clamps (HC-6N). 2. Application of this design: This design is used to heat and soften the fiber buffer layer and coating layer, reducing the stress on the fiber during stripping and preventing damage to the fiber. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

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.

The invention provides a quantum dot DFB laser based on a substrate buried grating. The quantum dot DFB laser comprises a substrate; the buffer layer is formed on the substrate; the N-type doped lower coating layer is formed on the buffer layer; the quantum dot active region is formed on the N-type doped lower coating layer; the P-type doped upper coating layer is formed in the quantum dot active region; and the N-type doped lower coating layer comprises a buried grating structure layer. The invention further provides a preparation method of the quantum dot DFB laser based on the substrate buried grating, and the flow ratio and the growth rate of the five-family elements and the three-family elements are optimized when the grating layer grows and the grating layer is buried. Through the design that the grating is buried on the lower substrate, the problem of damage of high temperature to a quantum dot active region in a traditional process is reduced, meanwhile, the limiting layer epitaxial design is optimized, the vertical divergence angle of a light field is reduced, the optical fiber coupling loss is reduced, and multi-mode oscillation is reduced.

The utility model belongs to the technical field of optical fiber connectors, in particular to an air-blowing traction integrated connector, which comprises a pin assembly, a pre-embedded optical fiber is arranged in the pin assembly, the pin assembly comprises a pin, a pin tail handle joint and a pin tail handle sleeve which are connected in sequence, the pin tail handle sleeve is connected with a rear sleeve in a riveting manner, and the pin tail handle joint is connected with the rear sleeve in a riveting manner. A spring is arranged between the pin tail handle sleeve and the rear sleeve, a connector shell connecting piece and a traction cap connecting piece are arranged on the rear sleeve, and the rear sleeve is detachably connected with a connector shell through the connector shell connecting piece. When the part with the connector integrally penetrates through the pipe, the minimum pipe penetrating section is 4mm; and in the air-blowing type penetrating process, when the contact pin assembly collides with the pipeline, the contact pin tail handle sleeve of the contact pin assembly can extend into the through hole of the rear sleeve to compress the spring between the contact pin assembly and the rear sleeve for buffering, so that the contact pin assembly is prevented from being damaged by collision.

An optical fiber cable comprises at least one hollow-core fiber having a tight buffer formed around the hollow-core fiber. The tight buffer has a multi-layer construction whereby an inner layer is tightly formed around an outer surface of the hollow-core fiber and an outer layer is tightly formed around the inner layer. The inner layer is formed of a soft material having a low elastic modulus, whereas the outer layer is formed of a material having a higher elastic modulus than the inner layer.

A kind of board card, cabinet, clock distribution circuit and system applied to quantum computing belong to quantum computing technical field;High-precision clock source is used to synchronize output high-speed clock signal and low-speed clock signal, ensure the synchronization of low-speed reference clock and high-speed sampling clock of multiple cabinets, multiple board cards;Independent clock distribution board card is used, high-speed clock electrical signal is converted into high-speed clock optical signal by microwave modulation light source, after optical power amplification, optical beam splitter, it is distributed to the clock distribution board card of each cabinet by optical fiber, low-speed clock electrical signal is connected to the clock distribution board card of each cabinet by radio frequency cable;High-speed clock optical signal, low-speed clock electrical signal are input to clock distribution board card, then by clock distribution board card distribution to each control board card, reduce the number of PD detector, Buffer, PLL and amplification filtering module on clock signal transmission path, reduce cabinet space use pressure and cost.

The utility model relates to the technical field of micro-lens coupling, in particular to a micro-lens coupling device which comprises an adjusting table, a turnover coupling mechanism is arranged at the top of the adjusting table and comprises a clamping table arranged on the surface of the adjusting table, a hidden groove is formed in the left side of the clamping table, and a turnover plate is hinged to the inner side wall of the hidden groove. A fixing plate is fixedly connected to the inner side wall of the overturning plate, a sliding seat is slidably connected to the interior of the fixing plate, an arc-shaped groove is formed in the inner side of the sliding seat, the outer side wall of the sliding seat is sleeved with a buffer spring, the buffer spring is fixedly connected to the back side of the fixing plate, and an electric telescopic rod is fixedly connected to the back side of the fixing plate; according to the utility model, the sliding seat is accommodated through the hidden groove, so that parts such as the sliding seat are prevented from influencing light path focusing, the pressure is dispersed more uniformly by utilizing the matching of the extrusion block and the fixed plate during coupling, and the pressure of the electric telescopic rod is buffered, so that the damage of the optical fiber and the micro lens caused by overlarge pressure is avoided.