Multimode fiber systems continue to provide the most cost-effective cabling solution for data centers, local area networks (LANs), and other enterprise applications. Compared to singlemode fiber, multimode systems offer significantly lower costs for transceivers, connectors, and connector installation while meeting and exceeding the bandwidth and reliability requirements of the most demanding networks.
If you are designing a new short-reach installation, you will probably choose laser-optimized 50-micron (µm) OM3 or OM4 multimode fiber. These fibers preserve the systems-cost benefits over singlemode fiber by using low-cost 850-nm vertical-cavity surface-emitting laser (VCSEL) technology, are capable of 10-Mbit/sec through 10-Gbit/sec operation, and will support upcoming 40- and 100-Gbit/sec transmission speeds.
But if you are upgrading an existing system, many of which have 62.5-µm multimode already installed, should you stick with 62.5-µm? Or can you go with the higher performance of 50-µm OM3 or OM4 fiber? This article highlights the things you must consider when upgrading an existing 62.5-µm system.
Before discussing the 62.5-µm and 50-µm fiber, we first display you 62.5-µm and 50-µm fiber patch cable from Fiberstore.
Multimode 62.5-µm (OM1) Optical Fiber Patch Cords
Multimode optical fiber patch cords can be used as cross-connect jumpers, equipment and work area cords. All Fiberstore optical fiber patch cords are manufactured using OFNR riser grade cable and are 100% factory tested for insertion and return loss to ensure transmission performance per ANSI/TIA-568-C.3 standard specifications. Multimode 62.5-µm patch cords terminated with ST, SC, and LC connectors (uniform and hybrid versions) are available in duplex and simplex designs. They are LC SC 62.5/125 multimode fiber patch cable, LC ST simplex multimode fiber patch cable, SC ST duplex multimode fiber patch cable, ect.
Features
- LC, FC, SC, ST, MU, MTRJ, E2000, SMA connector
- Fiber Types: Simplex, Duplex
- Micron: 62.5/125um
- Complete with Lucent Technologies aqua jacket Bandwidth transmitting rates up to 10 gigabits
- All of our fiber optic patch cables feature the high degree connectors 100% optically tested to ensure high performance
- Color: Orange
- Fiber class: OM1
Multimode 50-µm Optical Fiber Patch Cords
Fiberstore 50/125 Multimode Fiber Optic patch cables feature machine polished ceramic ferrules in a variety of connector terminated including FC, LC, MT-RJ, MU, SC, and ST. 50-µm fiber has OM2, OM3, OM4. Common 50-um fiber patch cable have LC-MTRJ 50/125 Multimode Fiber Patch Cords, LC SC 50/125 Multimode Fiber Patch Cords, ST SC 50/125 Multimode Fiber Patch Cords, ect. 50-Micron Multimode Fiber (MMF) is rapidly gaining in popularity due to its expanded bandwidth potential over traditional multimode fiber runs. Supporting nearly 3X the bandwidth over twice the distance, 50/125 fiber is recommended for all new premise applications including intra-building connections. When fiber optic band cables are needed that offer more bandwidth than traditional options, this product is one that delivers.
Why two fiber sizes?
The numbers under discussion—50-µm and 62.5-µm—refer to the diameter of the fiber’s core, through which light signals are transmitted. The first optical fibers, deployed in the 1970s for both short- and long-reach applications, were 50-µm multimode fibers. In the early 1980s, singlemode fiber replaced 50-µm fiber in longer-distance installations. However, 50-µm multimode continued to be more cost-effective for short-reach interconnects, such as building and campus backbones, up to 2,000-meter distances.
But as data rates increased, 50-µm fiber could not support 10-Mbit/sec rates over the 2-kilometer distances required by some campus installations. Not enough power could be coupled from the light-emitting diode (LED) sources in use at that time into the 50-µm core to support these link distances.
62.5-µm multimode fiber was introduced in 1985 to solve this problem. It could capture more light from a LED in its larger core, and 2-km campus links operating at 10 Mbits/sec were easily supported. Also, the larger-core fiber was easier to cable and connectorize. It became the most commonly used fiber for short-reach enterprise applications in North America.
Today, as data rates surpass 10-Gbits/sec and lasers have replaced LEDs, 62.5-µm fiber has reached its performance limit. 50-µm fiber offers as much as 10 times the bandwidth of the 62.5-µm fiber. What’s more, improvements in technology have made 50-µm fiber easier to use.
Which technology should I choose?
Given its superior technical characteristics for high-speed links, 50μm fiber is the clear choice for new multimode fiber links in most circumstances. Standards organizations including IEEE, INCITS, InfiniBand, OIF, TIA, IEC and ITU-T all specify laser-optimized 50μm fiber for new high-speed network installations. OM3-grade, high-bandwidth 50/125-micron fiber cable increases the flexibility of network designs and achieves data transfer rates up to 10 Gbps at the lowest available cost. Multimode 50μm fiber is the medium of the future, with 62.5μm fiber being supported chiefly for legacy purposes. However, the majority of the fiber deployed in the world today is 62.5μm, so backward compatibility is an important concern.
Assuming you already have 62.5μm fiber in your plant, should you stick with 62.5μm, or migrate to 50μm? As a first consideration, industry standards and leading media and equipment manufacturers recommend that you should not mix different types of fiber in a single link. If you have a 62.5μm run in the wall, that link should use all 62.5μm patch cables and equipment, including 62.5μm Net Optics Taps. However, extensive testing by Corning has shown that the signal loss from joining dissimilar fiber segments, when necessary, is small.
On the other hand, there are no technical drawbacks to using different fiber types in separate network links, as long as the ports at both ends of the link are compatible with the cable. Moreover, there is little if any cost difference between 62.5μm and a 50μm products in today’s market. Therefore, installing 50μm fiber for new network links is a good investment for future growth, even if your current plant has mostly 62.5μm fiber.
With the demand for network capacity increasing daily, upgrades must be planned with an eye to the future. Installing 50μm multimode fiber today brings immediate benefits of longer cable reach and improved light loss budget margins, and prepares the network for future upgrades. If you haven’t started already, it’s time to begin phasing out 62.5μm fiber and moving into the world 50μm for higher performance and better returns on your network investments.
About Fiberstore
Fiberstore provides both Singlemode and Multimode patch cables (including OM1, OM2, 10G OM3 and 10G OM4) that are available in Duplex and Simplex, as well as Plenum-rated. In addition, all the cables can be customized in optional lengths. On the other hand, Fiberstore provides a wide range options of plenum fiber patch cable which include SC, FC, LC, ST, MU, MTRJ, E2000, MTP etc, both single mode and multimode plenum rated fiber optic cable assemblies. Additionally, custom lengths, connector combinations and polishes are available. Our each fiber optic patch cable is individually tested and certified to be within acceptable optical insertion loss limits for guaranteed compatibility and 100% reliability, and is backed by our lifetime warranty.
This article comes from: http://www.fiber-patch-cords.com/blog/a/85/50-versus-62.5-Micron-Multimode-Fiber
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