11results about How to "Reduce connection loss" patented technology

The invention relates to the technical field of optical communication, in particular to a hollow-core optical fiber and single-mode optical fiber coupling structure and a coupling method thereof.On one hand, a light converging part is arranged through corrosion, then the light converging part is inserted into a coupling pipe, operation is easy, accuracy is high, insertion core corrosion can be conducted in batches, production is facilitated, and through non-insertion type coupling, the coupling efficiency is improved; the coupling structure can be suitable for hollow-core optical fibers with various fiber core sizes, has lower connection loss and higher coupling efficiency, has higher flexibility and compatibility in the aspect of connection between the hollow-core optical fibers and other optical fibers, and is not easily influenced by external interference and environment; and on the other hand, by controlling the distance between the light converging part on the optical fiber coupling section and the joint of the coupling tube and the hollow-core optical fiber, the situation that reflected light enters the hollow-core optical fiber can be reduced, echo reflection is reduced, and therefore the transmission effect of optical signals is improved.

The invention discloses a combined orientation-adjustable optical fiber distribution frame, and particularly relates to the technical field of optical fiber distribution frames, the combined orientation-adjustable optical fiber distribution frame comprises a base, the base is provided with a supporting assembly, the supporting assembly comprises a vertical rod arranged at the top of the base, and the top end of the vertical rod is provided with a supporting seat through a bolt. According to the optical fiber branching line, various types of optical fiber adapters can be conveniently mounted on the corresponding optical fiber branching line main bodies to realize transmission of optical signals, and the adapters are used for improving the interworking property and compatibility of the optical fiber adapters and the optical fiber branching line main bodies so as to ensure the stability and reliability of connection; meanwhile, the protection sleeve can protect the connection point of the two optical fibers, connection loss is reduced, the optical cables are arranged on a path through the electromagnetic shielding strips on the reinforced protection magnetism-resisting sheets, and then the optical cables are prevented from sharing channels with other electromagnetic interference sources such as cables and power lines, so that transmission loss and interference are reduced, and the service life of the optical cables is prolonged. And the network bandwidth is utilized to a great extent and the transmission rate is improved.

The invention provides a line loss measuring device and system which are used for measuring the line loss value of a first cable connected to the output end of external equipment, and the input end of the external equipment is connected with a second cable with known line loss. The line loss measuring device comprises a shell, an execution switch module and a measurement control module. A plurality of connecting ports are uniformly distributed on the shell; the execution switch module is arranged in the shell, is electrically connected with each connection port in the plurality of connection ports, and is used for transmitting the transmission loss of the first cable from the output end of the external equipment to each connection port to the measurement control module; and the measurement control module is used for measuring a line loss value according to the transmission loss, and transmitting the line loss value to the input end of external equipment through the execution switch module, each connection port and the second cable in sequence, so as to solve the problems that an existing line loss measurement device is large in size and cannot make full use of the whole device; the portability is poor; and the performance utilization rate is low.

The utility model belongs to the field of separation layer sensors, and relates to a mining optical fiber roof separation layer sensor convenient to connect, a sensor body is provided with an optical fiber convenient connecting mechanism, the optical fiber convenient connecting mechanism comprises a pair of optical fiber connecting through holes arranged on the sensor body, and optical fiber connecting adapters are installed in the optical fiber connecting through holes. The end, located in the sensor body, of the optical fiber connection adapter is connected with one end of the sensor optical fiber, the other end of the sensor optical fiber is connected to the optical fiber sensing module in the sensor body, and the monitoring host with the far end located on the ground is connected with the optical cable. The end, away from the monitoring host, of the optical cable is connected with the end, located outside the sensor body, of the optical fiber connection adapter. The optical fiber connection adapter makes the second optical fiber end face of the optical cable in contact connection with the first optical fiber end face of the sensor optical fiber. According to the utility model, the optical fibers can be directly connected through the optical fiber connection adapter, so that the time for carrying out optical fiber fusion splicing underground is effectively saved.

The application discloses a kind of intelligent landslide body burying condition under life search and rescue device and method, including shell, detection component being set in the inside of shell, for detecting life, the detection component is by hand-held tablet and detection host wireless connection composition, need not data line connection, can conveniently data transmission, battery compartment is opened on the detection host, separate battery that is inserted into battery compartment is placed in the inside of shell, battery cover is further provided on the top of battery compartment, the both ends of battery cover are provided with the connecting component connected with detection host;Through the connecting component of design, replace the installation of the mode of present by hand screw bolt, simultaneously, the dismounting of battery cover is very convenient, work efficiency is improved, simultaneously, the connection loss of this connecting component is less, and the use fatigue of structure such as existing bolt, spring does not appear, overall service life is longer, and manufacturing cost is lower.

The invention discloses a magnetic assembly and a manufacturing method thereof. The magnetic assembly comprises a magnetic element and a peripheral structure body. The magnetic element comprises a magnetic core and a winding, the winding is embedded in the magnetic core, and PINs are formed through the top face and / or the bottom face of the magnetic core. The peripheral structure is adjacent to the peripheral side of the magnetic core. Wherein the magnetic element and the peripheral structural body are combined to form a magnetic assembly, one manufacturing method of the magnetic assembly is to thin the top surface and / or the bottom surface of the magnetic assembly through a thinning process, the other manufacturing method of the magnetic assembly is to thin the top surface and / or the bottom surface of a magnetic core through the thinning process, and / or to thin PINs of a magnetic core winding through the thinning process.

The present invention discloses a magnetic component and a manufacturing method thereof, wherein the magnetic component comprises a magnetic element and a peripheral structure. The magnetic element comprises a magnetic core and a winding, wherein the winding is embedded in the magnetic core, and a PIN foot is formed through the top surface and / or the bottom surface of the magnetic core. The peripheral structure is arranged adjacent to the peripheral side of the magnetic core. The magnetic element and the peripheral structure are combined to form a magnetic assembly, and one method for manufacturing the magnetic component is to thin the top surface and / or the bottom surface of the magnetic assembly through a thinning process, and another method is to thin the top surface and / or the bottom surface of the magnetic core through a thinning process, and / or, to thin the PIN foot of the magnetic core winding through a thinning process.

The application provides a modular radio frequency receiving front end with fast power-on capability. The modular radio frequency receiving front end comprises a filtering limiting front end, a switch filtering amplification circuit, a power division circuit, a large dynamic SDLVA circuit and an SDLVA power supply circuit, and is connected with each functional module through an SMP joint to realize modular design, detects the performance of each circuit through multi-stage self-checking, increases the isolation degree between the SDLVA chip and the rear-stage operational amplifier circuit through an operational amplifier, and provides the power supply voltage of the ns level rising edge for the SDLVA detection module, so as to reduce the complexity of the radio frequency signal interconnection and the power supply control wiring of the multi-channel receiving front end, and has the characteristics of modular design, high sensitivity, high reliability, strong universality and the like.

The present invention provides a few-mode fiber grating selective filter. It consists of an incident optical fiber, an optical fiber circulator, a 1×N optical switch, a photon lantern A, a few-mode optical fiber, a grating area, a photon lantern B, a coupler and an output optical fiber. One end of the incident optical fiber is connected to a light source, and the other end is connected to the a port of the optical fiber circulator. The b port of the optical fiber circulator is connected to the 1×N optical switch. After the optical switch is connected to any optical path, the light is transmitted to the photon lantern A. The photon lantern excites different modes of the few-mode optical fiber according to the different pigtails incident at the multi-path end. After passing through the grating area, the light that meets the conditions is reflected, and the rest of the light continues to be transmitted to realize the filtering function. The reflected light is output through the c port of the optical fiber circulator, and the transmitted light is transmitted to the output optical fiber through the photon lantern B and the coupler. The present invention can be used for selective filtering, and different wavelengths can be filtered out according to the different effective refractive indices of the transmission mode of the few-mode optical fiber. It can be widely used in the field of optical communications.

The invention discloses an optical fiber mode rotating device which comprises a few-mode magneto-optic optical fiber, a matching optical fiber, a solenoid and an electromagnetic driving module. The different few-mode magneto-optical fibers are connected through the matching fibers, the few-mode magneto-optical fibers are arranged in the solenoids, the solenoids are connected with the electromagnetic driving module, and the electromagnetic driving module controls the current of the solenoids to be large, so that mode fields of non-circular symmetric fiber modes passing through the few-mode magneto-optical fibers can rotate at different angles.

The invention relates to a waste gas and fuel integrated treatment assembly of a solid oxide fuel cell system, which comprises an outer cylinder and a combustion cylinder, the combustion cylinder is arranged in the outer cylinder, a uniform distribution cylinder is arranged in the middle of the top wall of the combustion cylinder in a penetrating manner, a first layer of uniform distribution plate and a second layer of uniform distribution plate are arranged on the inner wall of the uniform distribution cylinder, and uniform distribution holes are formed in the first layer of uniform distribution plate and the second layer of uniform distribution plate; a plurality of streaming inclined holes are formed in the top wall of the combustion cylinder and distributed around the uniform distribution cylinder, an annular baffle is arranged on the outer wall of the combustion cylinder, the outer edge of the annular baffle is connected with the inner wall of the outer cylinder, and a cathode waste gas main inlet hole, a cathode waste gas supplementing inlet hole and a cooling mixing inlet hole are formed in the outer wall of the combustion cylinder. And the distances between the cathode waste gas main inlet hole, the cathode waste gas supplementing inlet hole and the cooling and mixing inlet hole and the uniform distribution cylinder are sequentially increased. According to the invention, the heat energy of the cathode waste gas and the anode waste gas can be more thoroughly recovered, the structure of the solid oxide fuel cell system is simplified, and the overall efficiency of the solid oxide fuel cell system is improved.