Guide to Buy Fiber Optic Power Meter in NOYAFA

Guide to Buy Fiber Optic Power Meter in NOYAFA

2021-10-20
NOYAFA
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fiber optic power meter generates high sales volume for SHENZHEN NOYAFA ELECTRONIC CO.,LIMITED since the establishment. The customers see great value in the product showcasing long-lasting durability and premium reliability. The features are greatly maximized by our innovative efforts throughout the production process. We also pay attention to the quality control in the material selection and finished product, which greatly reduces repair rate.NOYAFA has always been working on how to make our brand stand out so that we have strengthened and reinforced our brand mission - offer more authentic and transparent customer services. We have been seriously carrying out the brand mission and have made the voice of this brand mission being heard consistently so that our brand image becomes highly recognizable on multiple channels.At Best Cable Tester Supplier in China _ Noyafa, packaging and sample making are both customizable for fiber optic power meter. Customers can provide design or parameters for us to figure out a solution.
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New Technology of Optical Fiber Communication
New Technology of Optical Fiber Communication
1. Concept of WDMWDM (wavelength division multiplexing) technology is a technology that transmits multiple wavelength optical signals in one optical fiber at the same time.The basic principle of optical wavelength division multiplexing (WDM) is that the optical signals of different wavelengths are combined (multiplexed) at the transmitting end and coupled to the same optical fiber on the optical cable line for transmission, and the optical signals of combined wavelengths are separated (demultiplexed) at the receiving end for further processing, and the original signals are recovered and sent to different terminals. Therefore, this technology is called optical wavelength division multiplexing, Referred to as optical wavelength division multiplexing technology.How wide is the bandwidth of optical fiber?As shown in Fig. 7.6, there are two low loss transmission windows in the optical fiber: the wavelength is 1.31 μ m(1.25~1.35 μ m) Window, corresponding bandwidth (| Δ f|=|- Δλ c/ λ 2|, λ and Δλ Are the central wavelength and corresponding band width respectively, C is the speed of light in vacuum) is 17700 GHz; Wavelength 1.55 μ m(1.50~1.60 μ m) The corresponding bandwidth is 12500 GHz.When the two windows are combined, the total bandwidth exceeds 30thz. If the channel frequency interval is 10GHz, ideally, one fiber can accommodate 3000 channels.At present, some optical devices and technologies are not very mature, so it is difficult to realize optical frequency division multiplexing (OFDM) with dense optical channels. In this case, wavelength division multiplexing with small channel spacing in the same window is called dense wavelength division multiplexing (DWDM).At present, the system is an optical communication system composed of 8, 16 or more wavelengths on a pair of optical fibers (single optical fiber can also be used) in the 1550nm wavelength range, in which the spacing between each wavelength is 1.6nm, 0.8nm or less, which corresponds to the band width of 200ghz, 100GHz or narrower.WDM, DWDM and OFDM are not much different in essenceIn the past, technicians used to use WDM and DWDM to distinguish between 1310 / 1550nm simple multiplexing and 1550nm intensive multiplexing, but at present, DWDM technology is used in telecom applications.Since the multiplexing of 1310 / 1550nm exceeds the gain range of EDFA and is only used in some special occasions, WDM is often used to replace DWDM.WDM technology is of great significance for network upgrading, developing broadband services (such as CATV, HDTV and IP over WDM), fully tapping the potential of optical fiber bandwidth and realizing ultra-high speed optical fiber communication. Especially WDM and EDFA have a strong attraction to modern information network.At present, "erbium doped fiber amplifier (EDFA) dense wavelength division multiplexing (WDM) non-zero dispersion optical fiber (NZDSF, i.e. G.655 fiber) photonic integration (PIC)" is becoming the main technical direction of long-distance high-speed optical fiber communication lines in the world.If all optical fiber transmission links in an area are upgraded to WDM transmission, we can set an optical cross connection device (OXC) for cross connection of optical signals in wavelength units or an optical add drop multiplexer (OADM) for optical uplink and downlink at the intersection (node) of these WDM links, and a new optical layer will be formed on the physical layer originally composed of optical fiber links.In this optical layer, the wavelength channels in adjacent optical fiber links can be connected to form an optical path across multiple OXC and OADM to complete end-to-end information transmission, and this optical path can be flexibly and dynamically established and released according to needs, which is the eye-catching and new generation WDM all-optical network.2. Basic form of WDM systemOptical wavelength division multiplexer and demultiplexer are the key components of WDM technology. The device that combines signals of different wavelengths and outputs them through an optical fiber is called multiplexer (also known as multiplexer).On the contrary, the device that decomposes the multi wavelength signal sent by the same transmission fiber into each wavelength and outputs it respectively is called demultiplexer (also known as demultiplexer).In principle, this device is reciprocal (bidirectional reversible), that is, as long as the output and input of the demultiplexer are used in reverse, it is a multiplexer.Therefore, the multiplexer and demultiplexer are the same (unless there are special requirements).The basic composition of WDM system mainly includes the following two forms: dual fiber unidirectional transmission and single fiber bidirectional transmission.(1) Dual fiber unidirectional transmission.Unidirectional WDM transmission means that all optical paths are transmitted in the same direction on one optical fiber at the same time.As shown in Figure 7.7, dimmed signals with different wavelengths containing various information will be sent at the transmitter λ 1, λ 2,…, λ N is combined by optical multiplexers and transmitted unidirectionally in one optical fiber.Since the signals are carried through different light wavelengths, they will not be confused with each other.At the receiving end, signals of different wavelengths are separated by optical demultiplexer to complete the task of multi-channel optical signal transmission.The principle of transmission through another optical fiber in the opposite direction is the same.(2) Single fiber bidirectional transmission. Bidirectional WDM transmission means that the optical path transmits to two different directions on one optical fiber at the same time. As shown in Figure 7.8, the wavelengths used are separated from each other to realize bidirectional full duplex communication.Several key system factors must be considered in the design and application of bidirectional WDM system:For example, in order to suppress multi-channel interference (MPI), we must pay attention to the influence of light reflection, isolation between bidirectional paths, type and value of crosstalk, power level value and mutual dependence of two-way transmission, optical monitoring channel (OSC) transmission and automatic power shutdown, and use bidirectional fiber amplifier at the same time.Therefore, the development and application of bidirectional WDM system are relatively demanding, but compared with unidirectional WDM system, bidirectional WDM system can reduce the number of optical fibers and line amplifiers.In addition, by setting an optical add drop multiplexer (OADM) or optical cross connector (OXC) in the middle, the optical signals of each wavelength can be merged and shunted, and the wavelength add / drop and route allocation can be realized. In this way, the inserted or separated signals can be reasonably arranged according to the traffic distribution of optical fiber communication lines and optical networks.3. Performance parameters of optical wavelength division multiplexerOptical wavelength division multiplexer is an important part of wavelength division multiplexing system. In order to ensure the performance of wavelength division multiplexing system, the basic requirements for wavelength division multiplexer are:• low insertion loss• high isolation• flat in band and steep out of band insertion loss• good temperature stability• multiple channels• small size, etc(1) Insertion loss insertion loss refers to the additional loss caused by the addition of optical wavelength division multiplexer / demultiplexer, which is defined as the ratio of optical power between the input and output ports of the passive device, i.e(7.1)Where Pi is the optical power sent into the input port; Po is the optical power received from the output port.(2) Crosstalk suppression system crosstalk refers to the influence degree that the signals of other channels are coupled into a channel and degrade the transmission quality of the channel. Sometimes, this degree can also be expressed by isolation. For demultiplexer(7.2)Where Pi is the wavelength λ I is the input optical power of the optical signal, and PIJ is the wavelength λ The optical signal of I is connected in series to the wavelength of λ Optical power of channel J.(3) Return loss return loss refers to the ratio of the optical power returned from the input port of the passive device to the input optical power, i.e(7.3)Where PJ is the optical power sent into the input port, and PR is the return optical power received from the same input port.(4) Reflection coefficient reflection coefficient refers to the ratio of reflected light power PR to incident light power PJ at a given port of WDM device, i.e(7.4)(5) Working wavelength range working wavelength range refers to the wavelength range in which WDM devices can work according to the specified performance requirements( λ Min to λ max)。(6) Channel width channel width refers to the wavelength interval between light sources to avoid crosstalk.(7) Polarization dependent loss (PDL) refers to the maximum change of insertion loss caused by the change of polarization state.
Design of Consumptive Optical Fiber High Temperature Measuring Instrument
Design of Consumptive Optical Fiber High Temperature Measuring Instrument
1 IntroductionHigh temperature measurement plays an important role in aerospace, materials, energy, chemical industry, metallurgy and other fields. At present, in high temperature measurement, according to whether the measuring probe is in contact with the measured object, the temperature measuring instruments are divided into contact and non-contact.With the emergence of optical fiber technology, it provides conditions for the realization of contact temperature measurement. The contact optical fiber temperature measurement adopts a long quartz optical fiber as the temperature measurement probe and transmission system to keep the instrument away from the site with bad environment. At the same time, the optical fiber optical path is not affected by the environmental atmosphere, which greatly improves the environmental adaptability of the temperature measurement system. However, because the probe adopts the general radiation receiving principle, it is still difficult to solve the problem of emissivity. In order to overcome this problem, the principle of ash body temperature measurement is proposed. The colorimetric method can greatly reduce the influence of emissivity on the temperature measurement results. Under the best conditions, the influence can be reduced to zero. The advantage of such temperature measurement is that the temperature measurement response speed is fast, and the response speed is about 10s [3].The consumable optical fiber high temperature measuring instrument developed in this paper overcomes the above shortcomings and is a new method to measure the temperature of molten metal. Its temperature measurement accuracy is the same as that of the consumption thermocouple, but the temperature measurement cost is greatly reduced, which has great economic benefits and can completely replace the consumption thermocouple.2 principle of colorimetric temperature measurementColorimetric temperature measurement is a method to determine the temperature of an object by measuring the ratio of the radiance of the object at two different wavelengths. Its characteristic is that it can eliminate the interference caused by atmospheric, smoke, dust, ambient temperature and other factors on the measurement path.3 selection of working wavelengthAs can be seen from equation (3), it is very important to correctly select the wavelength and wavelength. Generally, the spectral radiance of the measured object is related to wavelength and temperature, as shown in Figure 1. The ordinate in the figure represents the radiation brightness of the blackbody, the abscissa represents the wavelength, and the temperature of the curve is getting higher and higher from bottom to top.From the curve in the figure, we can see several characteristics of blackbody radiation: (1) the total radiance increases rapidly with the increase of temperature. The higher the temperature, the greater the spectral radiance; (2) When the temperature is constant, the spectral radiance changes according to a certain law with different wavelengths, and the curve has a maximum value. The wavelength here is defined as that when the wavelength is less than, the radiance increases with the increase of the wavelength, and when the wavelength is less than, the change law is opposite; (3) When the temperature increases, the peak wavelength of spectral radiance moves to the short wave direction, the radiance of the object increases, and the luminous color also changes.The wavelength range is preliminarily set at 800 1000 nm, and there is no main absorption band of water vapor in this range, which can reduce the measurement error. When it is 800nm and 1000nm respectively, the relative sensitivity curve is shown in Fig. 2. The relative sensitivity of curve 1 in the figure is high. Therefore, it can be seen that it should be near 800nm. According to the relationship between the spectral response of the photodetector and temperature, it is required to have a good linear relationship. According to the linear relationship, it is better to take it near 950nm.After the experiment, the final choice = 890nm, = 940nm, the colorimetric temperature measurement effect is better.Fig. 2 relation curve between relative sensitivity and temperature
Working Principle of Cable Identification Instrument
Working Principle of Cable Identification Instrument
The working principle of the cable identification instrument needs to add a special signal to the identified cable, which should be received by a special receiver. Using this characteristic, the cable to be found can be identified. The cable identification instrument works according to the following principles: the cable identification instrument consists of a signal generator, a receiving clamp signal detector and an indicator. The signal generator mainly generates special pulse modulation signals, which are added to the stopped tested cable through the output line. The receiving clamp is used to find the tested cable on site. When the receiving clamp detector detects the special signal applied to the cable, The electric meter pointer on the signal detector swings synchronously with the frequency of the applied signal, while the signals detected on other cable lines are much smaller and in the opposite direction. It is easy to determine the tested cable by indicating the amplitude and direction of the electric meter. When the receiving clamp signal detector is used in combination with the signal generator, it can be used to distinguish the charged state of the cable, or assist in finding the short circuit position of the cable. When receiving clamp signal detector is used, clamp the cable with clamp. Dear customers: the company also has high-voltage cable fault locator, underground pipeline detector, power cable fault tester and other products. You can call the company's service phone through the web page to learn more product details. Perfect and beautiful service is our pursuit. New and old customers are welcome to buy their favorite products at ease. We will serve you wholeheartedly!
How to Find and Analyze the Fault Point of Buried Cable Fault Tester
How to Find and Analyze the Fault Point of Buried Cable Fault Tester
On site, the cable to be tested is high-voltage cable, and all three phases are short circuited. Usage when using the cable fault, first separate both ends of the cable from the system, and then connect the red and black clips of the instrument host to ab respectively. The measured short circuit distance between the two phases is 312m, and the total length of the cable is 639m. The same results are obtained when connecting to any other two phases. We determine that all three phases are short circuited. If the user knows the direct buried path of the cable, we can find it within 312 meters, and then use the transmitter red clip in the Pathfinder to connect phase A and the black clip to ground, and use the low-frequency high-grade loop resistance of 580 Ω. Because the cable is buried deeply before and after 312 meters, the depth measured by the 80% method is 3 meters, the gain 66db signal is about 675, and the signal is very stable without obvious attenuation. After the cable path is clear, boost and discharge phase a with high voltage, increase the voltage to 8Kv, fully discharge, start at a fixed point from 180m, and finally find the fault point. After communicating with the customer, excavate the fault point with an excavator for more than an hour. Host function of buried cable fault tester 1. It can measure high and low resistance faults of all cables below 35KV, with wide adaptability; 2. With user-friendly software and full Chinese menu, the key definition is simple and clear, and the measurement method is simple and fast; 3. Excellent fault detection success rate, test accuracy and test convenience; 4. 8-inch color LCD touch screen as the display terminal, the instrument has strong data processing ability and friendly display interface; 5. Sampling high voltage protection measures are provided. The test instrument will not crash and damage in the impact high-pressure environment; 6. The built-in power supply can test the open circuit and low resistance short circuit faults of the cable in the environment without power supply.
Cable Tracker to Find the Right TV Service
Cable Tracker to Find the Right TV Service
The introduction of cable trackerCable tracker is a device used by cable providers to check the status of their lines. It is a simple, non-invasive and quick way to detect faults in cables or cables that are not working at all. It helps technicians to effortlessly identify and repair issues quickly and efficiently.The introduction of cable tracker began when the National Cable Television Association (NCTA) first came up with this idea as it wanted to prevent service interruptions by providing an easier method for cable providers to spot faults in their lines. The NCTA was founded in 1972 as the United States’ first cable television industry trade organization for the American cable television industry.This article discusses how important it is for communications companies like Cable TV companies in order to avoid disruptions and access uninterrupted service.Tips for cable trackerCable trackers are a type of device used to identify the location of underground cables. This device is mostly used for utility and construction companies.This article is going to help you understand how the cable tracker works, how you can use it, and common mistakes to avoid.In this article, we will go over the following:1) How does a cable tracker work? 2) Common mistakes people make when using cable trackers 3) Tips for making your life easier with cable trackersHow to use cable tracker?Cable trackers are used to guide the cable wire through the wall. There are two types of cable trackers: straight and angled. Straight trackers can be used when drilling holes through a plasterboard wall, while angled ones can be used to guide cables through a brick or stone wall.I recommend that you use straight cable trackers if you need to drill holes in your walls, but if you want to use them for other purposes, then I recommend that you use angled ones. This is because they can be more difficult to install in brick or stone walls than straight ones.There are different types of cable tracker on the market and depending on their designs, some of them have more features than others. However, as long as they follow the same principle with their design, then they should workThe specifications of cable trackerCable tracker is a device that is used to align the cables in the house which are going through walls and floors.The cable tracker attaches to a wall, and then the cables go through its slots. The cable tracker can be placed on any surface and as soon as it touches the surface, it starts tracking over it.Most of these trackers have a slot for attaching a charger.These trackers also come with an app which you can use to control them remotely. The app makes it easy for you to see what your cable tracker is doing at all times.The product instructions of cable trackerCable tracker is a small device used for television cable and satellite TV. A cable tracker is a device that can tell you the right distance between your current location and the closest location to the desired channel.The product instructions of cable tracker say that it should be used on flat surfaces. This means that if you are using it on carpet, you should be extra careful when using it.It’s important to read the product instructions of cable tracker before using it so that you don’t get in trouble with your TV provider because of their terms and conditions.The application of cable trackerMany companies in the cable industry are using cable tracker machines to put together bundles. Cable tracking is a process of assembling, bundling and assigning individual price points to the various channels in a package.Cable tracker machines are used by cable operators and suppliers. They help bundle channels together for a specific customer contract. The operator can also use them to track the activity of their customers on their own side of the business to see what they want and what they don't want.
Introduction of Underground Pipeline Detector
Introduction of Underground Pipeline Detector
Classification of underground pipeline detectors 1. One category is to detect metal pipelines, electric / optical cables and some non-metallic pipelines with metal marker lines by using the principle of electromagnetic induction. This category is referred to as pipeline detectors for short. Advantages: fast detection speed, simple and intuitive, convenient operation and high sensitivity. Disadvantages: (underground pipeline detector) when detecting non-metallic pipelines, non-metallic probes must be used. This method is laborious and needs to invade the interior of the pipeline. 2. The other is to use electromagnetic wave to detect underground pipelines of all materials, which can also be used to find underground buried objects, commonly known as radar, also known as pipeline radar. Advantages: (underground pipeline detector) can detect pipelines of all materials. Disadvantages: high requirements for environment, poor sounding ability (it is difficult to check pipelines with deep buried depth), and high requirements for operator quality and experience. Any instrument is not superior and needs to be used together in order to give full play to their excellence. Traditionally, pipeline detectors only refer to pipeline detectors using the principle of electromagnetic induction, and also use * many instruments. Dear customers: Hello, our company is a high-quality development group with strong technical force to provide users with high-quality products Complete solutions and superior technical service companies. The enterprise adheres to the tenet of building a business in good faith, keeping the business with quality and developing the business with enterprising. It continues to climb new peaks with a firmer pace and make contributions to the national automation industry. New and old customers are welcome to buy their favorite products at ease. We will serve you wholeheartedly!
Theory of Cable Fault Locator
Theory of Cable Fault Locator
The basic function of cable fault locator is in the power industry and some industries using cables, especially in some complex power systems. It is very difficult to find the fault of underground cable lines. However, in this regard, the continuous emergence of equipment with various functions and simple operation can not only reduce the high cost of fault detection, but also reduce the inevitable long-time power failure when difficult to find (cable fault locator) cable fault, which brings a lot of convenience to troubleshooting. Direct buried cable fault detection in underground direct buried cable and underground residential power distribution (URD) system is a very time-consuming thing, and will cause very inconvenient power failure to users. Some technologies may also damage the cable. For some equipment with high technical requirements, its operation is more complex, and only operators with strict training can use it, which brings a lot of inconvenience to the popularization and application of this kind of technical equipment. Therefore, the selection of appropriate technology depends partly on the knowledge of cable system design understood by the designer of fault detector, and also partly on the professional and technical knowledge of equipment and operators in this regard. With appropriate equipment and professional technology working on site, it is the first step to detect faults quickly and effectively. Hammering (pulse) method many power companies use hammering (pulse) method. This technique is effective in detecting high resistance faults in a simple (cable fault locator) cable system. The hammering method includes using a pulse or impulse voltage to impact the power cut cable. When an effective high voltage pulse strikes the fault area, the fault point flashover and produces a hammering sound that can be heard by the operator along the cable surface. However, detecting cable faults often requires several hammers, and repeated shocks may damage the cable. Dear customers: Hello, our company is a high-quality development group with strong technical force, providing users with high-quality products, complete solutions and superior technical services. The enterprise adheres to the tenet of building a business in good faith, keeping the business with quality and developing the business with enterprising. It continues to climb new peaks with a firmer pace and make contributions to the national automation industry. New and old customers are welcome to buy their favorite products at ease. We will serve you wholeheartedly!
Best Wire Tracker to Cut, Tame,& Protect Home Wires
Best Wire Tracker to Cut, Tame,& Protect Home Wires
The introduction of wire trackerWire tracker is a robotic and autonomous material handling system that helps to automate the manual process of tying wire bundles. With the help of this machine, wire bundles are automatically wrapped around a bundle wrapping machine to be transported.Wire tracker saves time and manpower by decreasing material handling cost and increasing productivity. It also increases efficiency by automating the manual process of tying wire bundles. This system has many benefits in terms of safety as well as environmental impact.With the introduction of this machine, the automation process improves labor efficiency as well as safety in various applications such as power lines, water lines, solar panels, etc. Wire tracker reduces environmental impact by decreasing fuel consumption and greenhouse gas emissions from forklifts and trucks for transportation purposes.Tips for wire trackerWire trackers are among the most vital part of any electronics assembly or electronics manufacturing. They are responsible for accurately locating and tracking the wires on an electronic device during a production run.Wire tracking is not just about precision and accuracy - it’s also about efficient use of time, so a wire tracker needs to be able to handle multiple tasks at once.In this article, we will highlight some tips for finding the best wire tracking machines for your production facility.For starters, you need to decide what type of wire tracker you want. There are two main types: manual and automatic wire trackers. The former is more precise but it requires more time-consuming set-up while the latter can be adjusted easily from one machine type to another but they require more investments in automation equipmentHow to use wire tracker?Wire trackers are used by wire-tracing artists to work on creating their designs. They use a variety of tools such as wire, pens, paper and cardboard to create artworks.The process is similar to crocheting or weaving one fiber at a time. The artist has to form the wire into different shapes and coils. To start working with the wire, the artist needs to take it out of its packaging and unravel it from its plastic casing. This process is done by pulling it through one’s fingers and wrapping it around the hand until it forms a coil that they can continue working on.The specifications of wire trackerWire trackers are a tool used in the wire trade to ensure that items are accurately transported and separated. They work by allowing items to pass through a narrow slot without getting stuck.Wire trackers come in various shapes and sizes, but all of them are made from steel with a smooth-walled interior. The surface of them is not very rough, which makes it difficult to hook or grab the item by mistake.Wire trackers have many uses across the different industries. They can be found at airports, factories, warehouses, shopping malls, libraries and other places where valuable goods need safe transport.The product instructions of wire trackerWire trackers are the most widely used DIY tool in home improvement projects. They are used to hold wires, pipes, and cables.The instructions for using wire trackers are simple - however there is still an overwhelming number of problems that people have with them. It is important for manufacturers to make sure that their product instructions are easy to understand and don't include any spelling mistakes or grammatical mistakes.This section discusses how product instructions can be improved by AI writing assistants so that they can become more effective in improving the user experience.The application of wire trackerWire tracking is the process by which a wire is used to measure the progress of a drill.Wire tracking systems enable drill operators to easily and quickly set up their own equipment and work, keeping them safe. It also ensures greater efficiency and accuracy with each drilling job.Wire tracking allows for an increased level of control over drilling operations, which makes it perfect for high-quality production jobs where quality control is important
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