Category Archives: Single Mode Fiber (SMF)

Fiber Optic Cables Are The First Option For Data Transmission

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Fiber Optical Cable has brought a revolution to the data transmission system. As the earlier Electrical Wire System was difficult to manage and was sometimes also hazardous to life. With the emergence of Fiber Optical Cable, data transmission is no more an irksome job. It is now simplified, providing much more convenient than ever imagined.

Following Are The Reasons For Choosing Optical Cables For Network Cabling:

Safe To Use: Fiber Cable is far better than copper cable from the safety point of view. Copper and Aluminum Wire are good conductors of electricity and carry electric current. But when their outer insulated coating gets damaged, one can experience electric shock that can be dangerous to life. In this regard, Fiber Cables are safer to use because they do not transmit current but rather light waves.

Withstand Rough Conditions: Fiber Cable is capable of resisting tough conditions that co-axial or any other such cable cannot do. The reason is that other cables are usually made up of one or the other metal and are prone to corrosion, while Fiber Cable is covered with protective plastic coating with glass inside and transmits light impulses in spite of electric current, which make it resistant towards corrosion.

Long Distance Data Transmission: There cannot be any comparison in terms of data carrying capacity of Fiber Optical Cable and Copper Cable. Fiber Cable can transmit signals 50 times longer than Copper Cable.

Moreover, signal loss rate of Fiber Optical Wire is also very less, and thus does not need any kind of reminder in transmitting the signals at same pace. Fiber Cable has higher bandwidth that is amount of data communication resources available or consumed – this is the reason how Fiber Cable can transmit data at longer distances.

Easy Installation: Ethernet Cable is long and thin with intact cables inside. It is also light in weight which makes its installation at almost every place easier as compared to other wires.

No Electrical Interference: Fiber Optical Cable neither carries electric current nor need earthing. Therefore, it does not get affected by the electrical interferences. Fiber Cable is immune to moisture and lighting, which makes it ideal to be fitted inside the soil or an area where there is high Electromagnetic Interference (EMI).

Durable and Long Lasting: Fiber Optical Cable is durable and lasts longer than any other cable such as Co-Axial Cable, Copper Cable, etc. It is perfect for network cabling.

Data Security: Extra security can be provided with Fiber Optical Cable as it can be tapped easily and data transmitted through it remains secure, while in case of the Copper Cable there is no surety of data security and any loss of data cannot be obtained back.

There are various types of optical fiber cables available on the market, including 250um Bare Fiber, 900um Tight Buffer Fiber, Large Core Glass Fiber, Simplex Fiber Optic Cables, Duplex Multimode Fiber Optic Cable, OM4 OM3 10G Fiber Cable, Indoor Distribution Cable, Indoor & Outdoor Cable, Outdoor Loose Tube Cable, Fiber Breakout Cable, Ribbon Fiber Cable, LSZH Fiber Optic Cable, Armored Fiber Optic Cable, FTTH Fiber Optic Cable, Figure 8 Aerial Cable, Plastic Optical Fiber, Polarization Maintaining Fibers & Special Fiber, etc. They are used for different applications, one must do a thorough research before buying fiber cables for network cabling.

Fiber Optic Pigtail Technology Wiki

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As fiber cable network is built by drawing the long lines of physical cables, it is highly impossible to lay a continuous cable end-to-end. Then there comes the fiber pigtails, one of the cable assemblies, has a connector on one end and a length of exposed fiber on another end to melt together with fiber optic cable. By melting together the glass fiber cable, it can reach a minimum insertion loss.

Pigtails are terminated on one end with a connector, and typically the other side is spliced to OSP (Outside Plant Cable). They may be simplex: (single fiber), or multi-fiber up to 144 fibers. Pigtails do have male and female connectors in which male connectors will be used for direct plugging of an optical transceiver while the female connectors are mounted on a wall mount or patch panel. Fiber optical pigtails are usually used to realize the connection between patch panels in a Central Office or Head End and OSP cable. Often times they may also provide a connection to another splice point outside of the Head End or central office. The purpose of this is because various jacket materials may only be used a limited distance inside the building.

You may confused the purpose between fiber optic connector, fiber optic patch cord and fiber optic pigtail. Here we will figure it out.

Fiber optic connector is used for connecting fiber. Using one or two fiber optic connectors in one cable has two items with different assistance in fiber optical solutions.

Fiber optic patch cords(or called fiber jumpers) used as a connection from a patch panel to a network element. Fiber optic patch cords, thick protective layer, generally used in the connection between the optical transceiver and the terminal box.

Fiber Optic Pigtail called pigtail line, only one end of the connector, while the other end is a cable core decapitation. Welding and connecting to other fiber optic cable core, often appear in the fiber optic terminal box, used to connect fiber optic cable, etc.

Fiber optic cable can be terminated in a cross connect patch panel using both pigtail or field-installable connector fiber termination techniques. The pigtail approach requires that a splice be made and a splice tray be used in the patch panel. The pigtail approach provides the best quality connection and is usually the quickest.

Fiber pigtails are with premium grade connectors and with typical 0.9mm outer diameter cables. Simplex fiber pigtail and duplex fiber pigtails are available, with different cable color, cable diameter and jacket types optional. The most common is known as the fusion splice on pigtail, this is done easy in field with a multi-fiber trunk to break out the multi-fibers cable into its component for connection to the end equipment. And the 12 fiber or 6 fiber multi color pigtail are easy to install and provide a premium quality fiber optic connection. Fiber optic pigtails can be with various types of fiber optic terminations such as SC, FC, ST, LC, MU, MT-RJ, MTP, MPO, etc.

Pigtails offer low insertion loss and low back-reflection. They are especially designed for high count fiber optic fusion splicing. Pigtails are often bought in pairs to be connected to endpoints or other fiber runs with patch cables.

Five Reasons To Say No To OM1 Fiber

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OM1 fiber “In the multimode fiber sales in North America and around the world are occupied by more than 25% and more than 30%.” Now the question is, why users are suggested to not install 62.5 μm (OM1) fiber in their networks?

The five common reasons that users do not install OM1 fiber:

1. This is just a low-speed network cable extension. If it is more installation is only passive connection (for example, if the new OM1 cable is actually connect to any active devices), using OM3 or OM4 cables. When it comes to upgrade a low-speed link, the new OM3/OM4 fiber can remain in place, but may need to replace the old OM1 cable.

2. OM1 works well in today’s installing speed. Cabling installation means – and it is expected – will last 10 to 25 years. From now on, you will be still running the same speed of 10 to 25 years? The typical network equipment replacement cycle is five years, during the lifetime of optical cable your newly installed, you can expect 2 to 5 times equipment renewal.

3. OM1 is currently assigned. General specification provides a guide for suppliers, but if they do not update, including the recent improvements in technology, they are of limited value. If the current specification has not been updated recently, it can not work well for users.

4. OM1 is cheaper than OM3 cables or om4 cable. Based on the cost first on this is true. But the installation costs are almost the same, sometimes OM1 is higher. And if (or when) for equipments support higher speed must replace OM1, the initial savings are gone.

5. OM1 fiber has a better macrobend performance than 50 μm. Historically, in many cases it is correct for the fiber itself and fiber optic cabling. However, 50 μm fiber cabling attenuation is better than that of 62.5 μm OM1. In addition, the launched bending optimization or bend insensitive multimode fiber making the 50 μm macrobend performance is far superior to 62.5 μm OM1.

Multimode OM4 Cable Is Available For 40G Or 100G applications

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There are different categories of graded-index multimode glass fiber cable, including OM1, OM2, OM3 and OM4 cables (OM stands for optical multi-mode). OM1 specifies 62.5-micron cable and OM2 specifies 50-micron cable. These are commonly used in premises applications for shorter reach 1Gb/s networks. But OM1 and OM2 cable are not suitable for today’s higher-speed networks. OM3 and OM4 are both laser-optimized multimode fiber (LOMMF) and were developed to accommodate faster fiber optic networking such as 10, 40, and 100 Gbps. Both are designed for use with 850-nm VCSELS (vertical-cavity surface-emitting lasers) and have aqua sheaths.

OM3 specifies an 850-nm laser-optimized 50-micron cable with an effective modal bandwidth (EMB) of 2000 MHz/km. It can support 10-Gbps link distances up to 300 meters. OM4 specifies a high-bandwidth 850-nm laser-optimized 50-micron cable an effective modal bandwidth of 4700 MHz/km. It can support 10-Gbps link distances of 550 meters. 100 Gbps distances are 100 meters and 150 meters, respectively.

What Makes OM4 Different?

OM4 fiber, with its higher bandwidth, has an extremely precise refractive index profile, virtually free of perturbations or defects. Just like OM3, OM4 is a 50-micron, considered to be laser-optimized multimode fiber for use with VCSELs. The key difference of OM4 from OM3 is in the refractive index of the fiber, which is more precisely graded to better equalize the arrival time of the light modes traveling at various speeds along the core of the fiber. Mode equalization depends on how well the graded index profile is constructed during fiber manufacturing. The better the modes are equalized, the higher the bandwidth of the fiber. This translates to higher bandwidth and a 550-meter reach for 10Gb/s (with some vendors claiming a 600-meter reach) and a 150-meter reach for 40/100 Gig, compared to 300 and 100 meters respectively for OM3.

You can use OM2 fiber with VCSELs, but its performance is limited to 550 meters at 1 Gb/s and only 82 meters at 10 Gb/s, compared to OM4 fiber’s reach of over 1000 meters at 1 Gb/s and 550 meters at 10 Gb/s.

OM3 and OM4 fibers are selected as the only multimode fiber for 40G/100G applications, which are the development trends of fiber optic communication. The 40G and 100G speeds are currently achieved by bundling multiple channels together in parallel with special multi-channel (or multi-lane) connector types. This standard defines an expected operating range of up to 100m for OM3 and up to 150m for OM4 for 40 Gigabit Ethernet and 100 Gigabit Ethernet. The OM3 and OM4 fibers are optimized for 850-nm transmission and have a minimum 2000 MHz.km and 4700 MHz.km effective modal bandwidth (EMB), respectively. Two EMB measurement techniques are used today for the bandwidth measurement. The minimum effective modal bandwidth calculated (EMBc) method, in our opinion, offers a more reliable and precise measurement compared to the differential mode delay (DMD) mask technique. With minEMBc, a true scalable bandwidth value is calculated that can reliably predict performance for different data rates and link lengths. With a connectivity solution using OM3 and OM4 fibers that have been measured using the minEMBc technique, the optical infrastructure deployed in the data center will meet the performance criteria set forth by IEEE for bandwidth.

OM4 cable is also especially well suited for shorter reach data center and high performance computing applications, which is the best option for the small percentage for users running 10Gb/s over links between 300 and 550 meters (or the even smaller percent who anticipate running 40 or 100Gb/s between 100 and 150 meters).

ULA Marine Fiber Achieved The Recuction Of 100Gb/s Signal Attenuation

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FiberStore news, OFS, innovative fiber optic network products designer, manufacturer and supplier, recently introduced TeraWave ™ ULA marine optical fiber, which is a new single-mode fiber specially designed for 100 Gb/s coherent transmission of the transmission distance up to 12,000km undersea systems. TeraWave ULA fiber allows more wavelengths with higher transmission speed over sea.

TeraWave ULA is a major breakthrough of marine optical fiber technology, a unique combination of the maximum effective area and excellent cabling performance, but also can greatly reduce the signal attenuation of 100Gb/s reliable coherent transoceanic transmission distance. The effective area of the optical fiber greatly (153 square microns) reduce the nonlinear, allowing to send higher signal power to spans, while improving the signal loss (0.176 dB/km under 1550nm).

For short-distance transmission, such fiber can provide even better nonlinear performance, while improving spectral efficiency.

OFS uses proprietary technology for producing TeraWave ULA fiber, provides low water peak (LWP) performance and low polarization mode dispersion (PMD).

This new fiber is designed for the use of advanced modulation formats and coherent detection distance networks optimization,for example, the greatly distance between the coast and the terminal limit overseas network of DWDM transmission. Compared with previous generations of submarine fiber optic, TeraWave ULA optical fiber can reduce the performance limitations caused by fiber nonlinearity, thus providing higher spectral efficiency and lower repeater spacing.

For applications without using a repeater, hanging cable and deepwater intersection, also can make full use of the large effective area advantage of TeraWave SLA ocean optical fiber, the higher power handling capability without additional distortion, means the longer distance can be distributed more high speed channels before amplification.

For all its marine fiber optic equipment, OFS can be painted and splicing of TeraWave ULA, in order to meet the critical requirements of optical fiber cable. The fiber is carefully selected to meet the specifications of quantity, color, length and transmission properties of customers. And then assembled into a bundle, and the final measurement on the wire harness, to ensure all of its fibers are up to the performance requirements customer specified.