As we can see in the table below, there are advantages to OM4 fiber over OM3. This newer addition has added benefits when cabling existing OM3 fiber and adding OM4 to your application. Additionally, we are also seeing adoption of the violet OM4 fiber cabling. OM4 shares the same distinctive aqua jacket with OM3 fiber. It can support 40 Gigabit and 100 Gigabit Ethernet up to 100 meters however, 10 Gigabit Ethernet is most commonly used. OM3 supports 10 Gigabit Ethernet at lengths up to 300 meters. Like the OM2, its core size is 50 µm, but the cable is optimized for laser-based equipment. It supports up to 10 Gigabit Ethernet at lengths up to 82 meters but is more commonly used for 1 Gigabit Ethernet applications. OM2 also comes with an orange jacket and uses a LED light source, but with a smaller core size of 50 µm. This fiber type commonly uses a LED light source. It is most commonly used for 100 Megabit Ethernet applications, where longer cable runs are needed and where copper cabling is unable to support those lengths. It can support 10 Gigabit Ethernet at lengths of up to 33 meters. OM1 typically comes with an orange jacket and has a core size of 62.5 µm. Starting in 1989 with OM1 to the most recent OM5 which came out in 2014. Let’s take a closer look at each one of the multimode fiber types. It can transmit farther at lower data rates, such as going about 2km at 100Mb/s. The maximum transmission distance for multimode fiber cable is around 550m at the speed of 10Gbps. Because of this, more data can pass through the multimode fiber core at a given time. Multimode fiber cable has a larger core, typically 50 or 62.5 microns that enables multiple light modes to be propagated. Multimode fiber is also very commonly used in Data Centers. Multimode fiber is a kind of optical fiber mostly used in communication over shorter distances, for example inside a building or for the campus. With so many options, how do you know what multimode fiber type to use?įirst, let’s explain what multimode fiber is and where it is commonly used. There are several kinds of multimode fiber types available for high-speed network installations, each with a different reach and data-rate capability. Multimode fiber has become the fiber of choice to achieve 10Gbps speed over distances required by LAN enterprise and data center applications. In today’s ever expanding cabling systems, where higher bandwidth needs increase more and more, there has been a need to optimize the multimode fiber used for these applications. From the beginning with OM1, to the most current OM5, there have been various improvements to the overall performance of the optical fiber. Over the years we have seen many multimode fiber types. Written by Ben Hamlitsch, trueFIBER Fiber Technical Specialist, RCDD, FOIĪt the end of this article, you should be able to identify each MM cable jacket in the image above. OM1, OM2, OM3, OM4, and OM5 -Multimode Fiber Types
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