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by www.fiber-mart.com The OADM, optical add drop multiplexer, is a gateway into and out of a  single mode fiber . In practice, most signals pass through the device, but some would be “dropped” by splitting them from the line. Signals originating at that point can be “added” into the line and directed to another destination. An OADM may be considered to be a specific type of optical cross-connect, widely used in wavelength division multiplexing systems for multiplexing and routing fiber optic signals. They selectively add and drop individual or sets of wavelength channels from a dense wavelength division multiplexing (DWDM) multi-channel stream. OADMs are used to cost effectively access part of the bandwidth in the optical domain being passed through the in-line amplifiers with the minimum amount of electronics.   OADMs have passive and active modes depending on the wavelength. In passive OADM, the add and drop wavelengths are fixed beforehand while in dynamic mode, OADM...

by www.fiber-mart.com With the number of network connections needed to support 10 Gigabit Ethernet (10GbE) growing in data centers, a modern solution is needed to keep patching fields from becoming too congested. Introducing ultra-high-density cabling to data centers is a vast improvement over traditional fiber cabling. Using MPO and  MTP® connectors  and cables will help integrate fiber into a single interface and support the next technologies of 40 GbE and 100 GbE.   Multi Fiber Push On (MPO) Multi Fiber Push On, also known as MPO, was originally manufactured to facilitate high-density termination and support high speed communication networks. What started as a 12-fiber single row connector, has now evolved into 8 and 16 single row fibers that have the capability to be stacked together to create 24, 36 and 72 fiber connectors while using multiple precision ferrules. The standard for these MPO styles has been established by the International Electrotechnical Com...

Fiber optical splitter  is also known as “non-wavelength selective optical branching device”. It is a fiber optic device used to achieve a particular band optical signal power splitter and redistribution.   Optical splitter can be used as a stand-alone device in the OLT node, the light distribution point and the FTTH point. It can also be placed in the central office wiring facilities, the light distribution points and FTTH points within the facility (integrated design or plug-in).   In accordance with the production process, optical splitters are divided into Fused Bi-conical Taper (FBT Splitter) and Planar Lightwave Circuit (PLC Splitter).   FBT Splitter (FBT Coupler)   Fused Bi-conical Taper technique is tied to two or more fibers, and then melted in a cone machine, pull tensile and real-time monitoring of changes in splitting ratio, the splitting ratio to meet the requirements after the end of the melt stretching, and wherein one end of a fi...

by www.fiber-mart.com When deploying a  fiber network , one of the key factors used to calculate ROI is how long it will operate. After all, some copper networks have lasted 140 years in the UK, even if they can’t necessarily meet today’s high-speed broadband needs in their current form.   Optical fiber is inherently more fragile than copper. It is a particular type of glass (fused silica), with a typical tensile strength that is less than half that of copper. However, even though fused silica looks, and can feel, fragile and brittle, if correctly processed, tested and used it has proven to be immensely durable.   To assess the durability of any material it’s useful to consider certain attributes:   Initial strength Rate of degradation Any flaws that can weaken it Reagents that can weaken it Its optical lifetime - as the silica must still be able to function satisfactorily  With this is mind, there are essentially four factors that will ...

by www.fiber-mart.com Fiber optic splicing  is the process of joining two or more fibers together. Whether you're deploying a new fiber optic network or expanding an existing network, you must ensure your fibers are properly spliced to avoid network disruptions.   Splicing fibers is commonly used to rejoin fiber optic cables when accidentally broken or to fuse two fibers together to create a fiber that is long enough for the required cable run.   There are two accepted methods of splicing fibers:   Mechanical splicing Fusion splicing Of the two methods, a mechanical splice can be performed much quicker than a fusion splice. A mechanical splice is a junction of two or more fibers that are aligned and then held together by connectors.   Although easier to perform, mechanical splicing allows an increase in insertion loss. So, mechanical splicing is only ideal for quick or temporary restoration, not for permanent splices.   The most c...

by www.fiber-mart.com It is easy to understand literally that the main difference between Gigabit optical modules and  10 Gigabit optical modules  is that the transmission rate is different. The transmission rate of the Gigabit optical module is 1000 Mbps, and the transmission rate of the 10 Gigabit optical module is 10 Gbps. In addition to the difference in transmission rate, what are the more specific differences between Gigabit optical modules and 10 Gigabit optical modules?   Gigabit optical module   As you can know from the naming, the Gigabit optical module is an optical module with a transmission rate of 1000 Mbps, usually expressed by FE. And the Gigabit optical module generally has two kinds of Gigabit SFP optical modules and GBIC optical modules, and the transmission distance can reach between 80m and 160km. In general, Gigabit optical modules can be identified from the specification details of the product itself and the optical module naming rul...

by www.fiber-mart.com The Gigabit RJ45 copper SFP transceiver supports 1000Mbps over Cat5 cables with RJ45 connector interface, which operates on standard Cat5 unshielded twisted-pair copper cabling of link lengths up to 100 m (328 ft). For short-distance links on a Gigabit switch, it makes no difference if you use SFP ports or RJ45 ports to interconnect switches. Copper SFP is popular to be used for short range uplinks, as it’s easier and cheaper to use 1G copper SFPs and patch cables. And SFP ports are primarily for allowing fiber connections over longer distances. Especially in some case, Copper SFP will make sense if the switch on one side does not have copper ports but SFP slots and the switch on the other side only has copper and can’t be fitted with fiber ports. Or if you don’t need the distance of fiber, you can consider converting SFP to RJ45, which will depend on the switch to determine what copper speeds (10/100/1000) are supported on a copper SFP. Moreover, using copper ...

by www.fiber-mart.com In CWDM networks, bidirectional CWDM MUX DEMUX (also called dual fiber CWDM MUX DEMUX) uses the same wavelengths for transmitting and receiving. It is often used in dual way transmission applications. The working principle is easy to understand. A duplex fiber cable links two dual-fiber CWDM MUX DEMUXs supporting the same wavelengths installed on each end of the fiber optic network. The wavelengths of the two fibers are the same, but they are running on the different directions for duplex transmission. However, in some cases, there is only one fiber available for network capacity expansion. Then, single fiber CWDM MUX and DEMUX is being used, which is very different from the dual-fiber one.   The single fiber  CWDM MUX DEMUX  has a simplex line port (shown in the above picture), which is the biggest difference from the bidirectional CWDM MUX DEMUX on the appearance. There are also some single fiber CWDM MUX and DEMUX are made with a duplex por...

by www.fiber-mart.com The OADM, optical add drop multiplexer, is a gateway into and out of a single mode fiber. In practice, most signals pass through the device, but some would be “dropped” by splitting them from the line. Signals originating at that point can be “added” into the line and directed to another destination. An OADM may be considered to be a specific type of optical cross-connect, widely used in wavelength division multiplexing systems for multiplexing and routing fiber optic signals. They selectively add and drop individual or sets of wavelength channels from a dense wavelength division multiplexing (DWDM https://www.fiber-mart.com/cwdm-dwdm-multiplexers-dwdm-mux-demux-c-6_26_115.html ) multi-channel stream. OADMs are used to cost effectively access part of the bandwidth in the optical domain being passed through the in-line amplifiers with the minimum amount of electronics.   OADMs have passive and active modes depending on the wavelength. In passive OADM, th...

by www.fiber-mart.com PLC splitter  is a simple passive component which plays an important role in the applications of technologies like GPON, EPON and BPON. It allows a strand of fiber optic signal being equivalently splitted into several strands of optical signal, which can support a single network interface to be shared by many subscribers. When selecting it, split ratios should always be considered. However, with the network cabling environment becoming increasingly complex, various PLC splitters with different package form factors are being invented. Now the package form factor of it is also a key factor to be considered. This post will introduce the most commonly used PLC splitters in different package form factors for your reference during selection.   Bare Fiber PLC Splitter   Bare fiber PLC splitter is commonly used in FTTx projects. It leaves bare fiber on all its ends. Thus, they can be spliced by network engineer freely according to the applications...

by www.fiber-mart.com Main parameters of the optical modules 1. Transmission rate The transmission rate refers to the number of bits transmitted per second in units of Mb/s or Gb/s. Main rates: 100M, Gigabit, 2.5G, 4.25G and 10G, 25G, 40G, 56G, 100G, 120G, etc.   Therefore, based on different data rate, our optical transceiver modules arrange 100M, 1G/2G/4G SFP module, 10G SFP+/XFP, 16G SFP+, 25G SFP28,  40G QSFP+ , 56G QSFP+, 100G CFP/CFP2/CFP4/QSFP28 Module.    2. Transmission distance The transmission distance of the optical module is divided into short distance, medium distance and long distance. It is generally considered that a short distance is 2 km or less, a medium distance of 10 to 20 km, and a long distance of 30 km, 40 km or more. ■ The transmission distance of the optical module is limited, mainly because the optical signal has a certain loss and dispersion when transmitted in the optical fiber.   note: • Loss is the loss of...

by www.fiber-mart.com A  coherent optical transceiver  has a transmitter (TX) laser and a local oscillator (LO) laser, which can be based on two separate lasers or a single laser. The laser specification requirements are different for different transmission distances. Here we discuss a few key laser requirements and where they will be used.   1. Low power consumption and small size   As can be seen in Fig.1, a tunable laser with low power consumption and small size is always required for pluggable coherent transceivers. Line-cards, on the other hand, can have a better tolerance toward these two requirements.  Note that the new small form factor pluggables such as DD-QSFP and OSFP have a very tight space and naturally special care needs to be taken to ensure these two laser requirements are met.   2. High optical power This is especially important for a coherent transceiver with (a) a higher modulator insertion loss (e.g., silicon photonics-...

by www.fiber-mart.com Because of the cost of installation and natural resistance to change, many businesses and individuals are hesitant to pursue a Fiber-Optic connection. This decision is perfectly rational when it comes to a home environment: if you are happy with your current connection, then why change? When it comes to commercial use, however, the stakes are a bit higher. Your competition may already be utilizing this technology of the future, whether you have invested in it or not. And the benefits which Fiber-Optics offer are undeniable.   Let’s take a look at what sets fiber optic internet apart from alternative internet options — and why such a connection may be a smart investment for your business to make.   Dial-Up Internet   Though its use is now mostly limited to extremely rural areas and the homes of the incredibly stubborn, dial-up does still exist, and this method continues delivering slow-speed internet using telephone lines.   Pr...

by www.fiber-mart.com We believe passionately that infrastructure built using fibre optic cable technology is the only way to deliver the growing capacity and speeds that the market demands. So what exactly is a fibre optic cable and why is it superior?   The history of  fibre optic cables  for telecommunications stretches as far back to the early days of the telephone. In 1880 Alexander Graham Bell created a very early precursor to fibre-optic communications, the Photophone. The device allowed for the transmission of sound on a beam of light, however, it would not prove practical until advances in laser and optical fibre technologies. It wasn't until the mid 1970's that the first optical fibre cables were produced capable of delivering long distance communication, but costs remained high and adoption low. The growth of the internet and the demand for voice and data traffic demonstrated the need for new more capacity and higher speeds were needed. This revolution r...