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OTDR: General Questions
Apr 28 , 2021
Q: What do OTDRs test? A: OTDRs test the overall length, loss and optical return loss of fiber optic cables or networks. Additionally, they detect, locate, identify and measure optical components in installed networks including fusion splices, optical connectors and PON splitters as well as faults such as breaks or tight bends causing high loss. Q: Does it take training to use an OTDR? A: Each OTD...
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How to distinguish SM and MM fiber？
May 07 , 2021
According to the transmission mode of light in the fiber, it can be divided into: single-mode fiber and multi-mode fiber. The core diameter of the multimode fiber is 50-62.5μm, the outer diameter of the cladding is 125μm, the core diameter of the single-mode fiber is 8.3μm, and the outer diameter of the cladding is 125μm. The working wavelength of the optical fiber has short wavelength 0.85μm, lon...
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The importance of underground cable fault detector
May 12 , 2021
Underground pipeline is an important part of urban infrastructure, urban underground pipelines, including water supply, drainage, gas, heat, telecommunications, electricity, industrial pipelines and other broad categories,Is to play a city function, the material basisto ensure that the city's economic and social health, coordinated development, known as the city's "blood vessels" and "nerves".At t...
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Why can't the OTDR test, how to test?
Jul 26 , 2021
For our communication, OTDR is the equipment that we usually have to get in touch with, so analyzing OTDR and detecting faults is a skill we need to learn So what aspects should we start with if the OTDR test fails? Next, the editor will take you to learn more about how to detect OTDR problems. Especially when it can't be tested. 1. The optical port is not plugged in properly. Our OTDR optical por...
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The Most Import Thing You Need To Know About Fiber Optic Power Meters
Jul 30 , 2021
Optical Power Meters Here The fiber optic power meter is a special light meter that measures how much light is coming out of the end of the fiber optic cable. The power meter needs to be able to measure the light at the proper wavelength and over the appropriate power range. Most power meters used in datacom networks are designed to work at 850nm and 1300nn. Power levels are modest, in the range o...
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What is OTDR Blind Area?
Aug 26 , 2021
Why does the blind area come up? The OTDR produces a blind area because the OTDR's detector is temporarily "blinded" by the high intensity Fresnel reflection light (mainly caused by the air gap between the OTDR connections). When the high intensity reflection is produced, the power of the photodiode is more than 4000 times higher than the backscatter power. Thus, the reflected light signal receive...
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The knowledge of photoelectric composite cable
Sep 01 , 2021
Photoelectric composite cable refers to a transmission line suitable for broadband access network systems. It is a new type of access method. It integrates optical fiber and copper wire for power transmission. It can solve the problems of broadband access, equipment power consumption, and signal transmission. structure Photoelectric composite low-voltage cables (referred to as photoelectric compos...
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Introduction and use of the optical cable identifier
Sep 17 , 2021
When using the optical cable identifier, the user only needs to tap the optical cable lightly to easily find the target. The built-in system of the instrument can convert the tapping information into audio and video signals. In other words, we can hear or see the target optical cable. Where. The optical cable identifier completely replaces the previous cutting, bending, freezing and other methods....
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The knowledge and use of OTDR launch cable
Mar 04 , 2022
1. Knowledge of OTDR extension cable The OTDR extension cable is similar to the optical fiber jumper. There is no fusion point in the middle of the optical fiber. During the optical fiber test, the OTDR extension cable is the insertion loss and reflectivity of the near-end connection and the far-end connection of the optical fiber line when using the OTDR measurement. It is mainly used to make up ...
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Difference between G652 fiber and G654 fiber
Mar 18 , 2022
G.652 optical fiber is the most widely used optical fiber. At present, except for fiber-to-the-home (FTTH) home optical cables, almost all optical fibers used in long-distance and metropolitan areas are G.652 optical fibers. From the perspective of light energy distribution, the optical signal in the single-mode fiber is not only transmitted in the core, but also in the cladding. In ...
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How to reduce the fusion splicing loss?
Apr 28 , 2022
The size of the loss is a very important technical indicator of the optical fiber fusion splicer. The lower the loss, the higher the precision of the machine, which can support longer distance fusion splicing. The more perfect the fusion point, the longer the service life. 1. The fiber cleaver cutting angle of the fiber is very important. At present, most of the optical fiber fusion splicers are f...
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OTDR test with light
May 24 , 2022
What is OTDR test with light? When testing with the wavelengths of 1310nm, 1490nm and 1550nm of common OTDR, it is necessary to require that there is no communication optical signal in the line under test. Forcing the test with light will burn out the internal detector of the OTDR. With light test, the OTDR can still complete the test without interrupting the signal light in the line during the te...
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What is the difference between the six motors and four motors of the fusion splicer?
Jun 07 , 2022
Maybe many friends' cognition of splicing machines and motors only exists in the more the better. This is true, but too general. Today we will talk about why six-motor splicing machine have lower losses and better performance. 1. Four motor fusion splicer, with two propulsion motors and two core-adjusting motors. The six-motor splicing machine also has two focus motors. The most intuitive view is ...
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The introduction to OTDR begins with the cognitive curve
Aug 16 , 2022
OTDR is one of the most commonly used fiber optic measurement instruments and is widely used in the measurement, construction, maintenance and acceptance work of fiber optic cable projects. Although OTDR is widely used and is a common instrument for many installation and maintenance teams and engineering teams, but due to the OTDR curve expression is not intuitive enough, there are still many prac...
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How To Cut Fibers With Large Cladding Diameters?
Sep 08 , 2022
In order to meet the needs of industry and scientific research that pursue high precision and need to cut large diameter optical fibers, Seikofire launched the SH-D106 large diameter optical fiber cleaver. It has a wide range of applications in fiber lasers, fiber sensor manufacturing, project research and development in universities and related R&D institutions, submarine optical cables, nati...
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What color are the 4-core, 12-core, 48-core, 96-core and 144-core optical fiber cables sorted by?
Oct 26 , 2022
Many times, friends have left messages asking how the colors of optical fiber splices are sorted. This is still quite a lot in practical application. So today we will not talk about the principle, but simply use the picture and text to talk about the optical fiber fusion chromatography. In this issue, let's learn about it together. General sorting. The common optical fiber is 4-core, 12-core, 48-c...
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