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  Introduction to EDFA Amplifier   EDFA amplifier, also referred to as erbium-doped fiber amplifier, is basically composed of a length of Erbium-doped fiber (EDF), a pump laser, and a WDM combiner. When it works, the pump laser with 980 nm or 1480 nm and the input signal around 1550 nm can be combined by the WDM combiner, then transmitted and multiplexed into the Erbium-doped fiber for signal amplification. The pump energy can be transmitted in the same direction as the signal (forward pumping), or the opposite direction to the signal (backward pumping), or both direction together. And the pump laser can also using 980 nm or 1480 nm, or both. Taking the cost, reliability and power consumption into account, the forward pumping configuration with 980nm pump laser EDFA amplifier is always the first choice to enhance the signals for a long WDM system.     Currently, utilizing WDM technology to deploy the optical network has received widespread attentions, which...

  The appearance of the QSFP28 optical transceiver is the same as that of the 40G QSFP + optical transceiver. The difference is that QSFP28 optical transceiver can transmit optical signals up to 100G. Therefore, QSFP28 optical transceiver has become the mainstream 100G optical transceiver and the preferred solution for network upgrade of 100G. This article describes the differences between the QSFP28 PSM4 optical transceiver, the QSFP28 SR4 optical transceiver, and the QSFP28 LR4 optical transceiver.   The Definition of Different Types of QSFP28 Optical Transceiver:   QSFP28 PSM4 optical transceiver is a high-speed, low-power product with a hot-swappable QSFP form factor with built-in digital diagnostics and eight optical fibers, each with a data rate of 25Gbps.   QSFP28 SR4 optical transceiver is a parallel 100G optical transceiver with the advantages of high port density and low cost. If you need a short distance transmission of optical transceivers for...

DWDM technology multiplexes the tight spectral spacing of a single optical fiber carrier in a given fiber to take advantage of the transmission performance that can be achieved. DWDM wavelength spacing is very tight, because the closer the spacing is, the more channels per fiber will be reused, and thus the higher the bandwidth. The international telecommunication union (ITU) g. 694.1 standard regulates the nominal wavelength interval of DWDM system. Each channel was spaced three ways: 0.4nm(50Ghz), 0.8nm(100Ghz), and 1.6nm(200Ghz).   The most important advantage of CWDM is the low cost of equipment. Because of the wide wavelength interval of CWDM system, the requirement for the technical index of laser is low, so the structure of laser is greatly simplified and the yield is improved. In addition, the power consumption and physical size of CWDM system are much smaller than DWDM system. In addition, CWDM light modulation adopts non-cooling laser and electronic tuning. DWDM USES ...

SFP stands for “small form-factor pluggable.” SFP transceivers are compact and hot-pluggable devices that act as an interface between networking equipment (switch, router, network card) and interconnecting cabling (copper or fiber).   The CWDM optical module is an optical module using CWDM technology to implement the connection between the existing network device and the CWDM multiplexer/demultiplexer.   When used with a CWDM multiplexer/demultiplexer , CWDM optical modules can increase network capacity by transmitting multiple data channels with separate optical wavelengths (1270 nm to 1610 nm) on the same single fiber.   The composite optical signal is decomposed at the receiving end using a wave decomposition multiplexer, thereby conserving fiber resources. Therefore, CWDM optical modules are called a low-cost and efficient network solution.   Secondly, the classification of CWDM optical modules CWDM optical modules can be classified into CWDM SF...

Optical fiber has become people's first priority in communication installation due to its advantages of fast transmission speed, long distance, safety and stability, and strong anti-interference ability. At present, the long-distance data transmission used in many smart projects basically uses optical fiber transmission. The connection between these requires an optical module and an optical fiber transceiver. Many users have some doubts about the use of optical modules and optical transceivers. How to connect the two, and what are the precautions? Below, fiber-mart.com will share the difference between optical modules and optical transceivers.   1. Optical module   The optical module is an optoelectronic device that performs photoelectric and electro-optical conversion. The transmitting end of the optical module converts electrical signals into optical signals, and the receiving end converts optical signals into electrical signals. Optical modules are classified acco...

This article will share with you the problems and solutions frequently encountered during the installation and use of fiber optic transceivers. When encountering these problems, how should we deal with them? Now Fiber-mart.com Communication will share with you the installation and troubleshooting methods of the optical fiber transceiver through this article:   Problems encountered in the installation and use of optical fiber transceivers Step 1: First check whether the indicator light of the fiber optic transceiver or optical module and the twisted pair port indicator light are on?   1. If the optical port (FX) indicator of the A transceiver is on and the optical port (FX) indicator of the B transceiver is off, the fault is at the A transceiver: one possibility is: A transceiver (TX) optical transmission The port is broken, because the optical port (RX) of the B transceiver cannot receive optical signals; another possibility is: there is a problem with the optical fi...

We know that fiber optic technology has started a revolution in the human communication process and optical fiber is the key component in fiber optics. Light, of course, no doubt is the carrier of our communication signals. We have been using light to transmit information for hundreds of years from now. However, the new way of transmitting light through optical fibers opened up new avenues of technological innovations that have started enhancing human life.   Similarly, the invention of LASER (Light Amplification by Stimulated Emission of Radiation) in the 1960s was one of the major leaps that made the transmission of light through optical fibers possible. The laser can send a larger amount of data than telephone, microwave, and copper telecommunication systems.   Scientists have tried many different ways to transmit Laser light. They tried through different types of glass fibers and watched which one gave out lower transmission losses. The experiments span from space ...

For data center and enterprise deployments, pre-terminated copper trunk cable is a wonderful choice to achieve simple and quick installation. It can fit most patch panel port densities and improve better airflow and cable management. With the right upfront planning and coordination, these copper trunk cables can offer major benefits over terminating twisted-pair cables in the field. This article will take you to explore the pre-terminated copper trunk cable.   What Is Pre-terminated Copper Trunk Cable? Pre-terminated copper trunk cable is a kind of cable which has gone through the same procedures with other cables. But their connectors have already been terminated, properly polished, and the entire cable assembly tested on either both or one end in the factory. Copper trunk cables are typically comprised of bundles of 6, 8, or 12. Since they are bundled together, there is no need to worry about the cable mess. Pre-terminated copper trunk cables provide a quick “plug-and-play...

The data market doesn’t sit still for long. Even with the release of the 40Gig and 100Gig Ethernet standards, we’ve seen growing demand for speeds beyond these new standards. The ever-increasing need for data has arisen from social interaction and the rise of the Internet of Everything, as businesses seek to maximize their advantage.   Historically, the introduction of new standards would see a performance increase but in copper we’ve seen three new standards that seek to use current copper technologies to overcome shortfalls in performance. The introduction of 2.5G and 5.0G standards have seen users of Cat5E and Cat6 secure additional gains from their platform, albeit in a wireless manner. The introduction of the 25G system is a downgrade of the 40G standard.   Has copper reached its performance zenith when compared to optical fiber? With future standards focusing on 400GB and beyond and with single mode optical fiber in the drafts, who knows?   Implementatio...

We know that both 100G active optic cables (AOC) and 100G direct attach cables (DAC) are used to transmit data. However, there are some differences between 100G active optic cables and 100G direct attach cables. Next, we will introduce the difference between these two types of cables in detail.   1. What is 100G active optic cable?   100G active optic cable refers to the communication cable that needs to use external energy to convert electrical signals into optical signals or convert optical signals into electrical signals during the communication process. The optical transceivers at both ends of the optical cable provide photoelectric conversion and optical transmission functions, and the transmission rate reaches 100Gb/s.   2. What is 100G direct attach cable?   100G direct attach cable adopts silver-plated conductor and foamed insulated core wire, which has excellent low attenuation performance and low delay performance, so that the signal transm...

  How safe, efficient, and organized is your fiber optic cabling? That largely depends on your cable management practices. Optimal organization of your networking cables delivers these benefits:   • Enhanced signal integrity by minimizing macrobend losses • Protection of cables from macro-bending damage • Improved accessibility for maintenance and upgrades • Quick cable identification • Neat and aesthetically-pleasing fiber infrastructure But you need to use the right tools and methods to optimize your fiber optic cable managemen t. Here's how to do it right:   Use Vertical or Horizontal Cable Managers   Vertical and horizontal cable managers hold your cabling together for orderly and efficient management. You may need them both to secure and organize your fiber-optic cables.   For example, you may place horizontal managers in front of cabinets or racks and use them to neatly hold your cables together. These tools also work well wi...