Tag Archives: OM1

What Are OM1, OM2, OM3 and OM4?

Multimode fiber is a kind of optical cables which is designed to carry multimode light rays or modes concurrently. Those light rays or modes are reflected at slightly different angles within the optical core which is in the standard 125-μm cladding. And due to its modes tend to disperse over long distance, multimode fiber is applied for communications over short distances. Now there are four types of mulimode fibers: OM1, OM2, OM3 and OM4 types which are of different properties. This article will introduce the four types in details.

OM1 Fiber

OM1 fiber has a core size of 62.5µm with an orange jacket which is at the wavelength of 850 nm /1300 nm. It supports 10 Gigabit Ethernet at lengths up 33 meters but is most commonly used for 100 Megabit Ethernet applications. In the 80’s, 90’s and early 2000’s, the 62.5/125µm OM1 fiber was thought to be the most popular multimode fiber choice for it has the lowest data carrying capacity and shortest distance limitations in comparison with other multimode fiber types.

Multimoder FIber Core Diameters

OM2 Fiber

OM2 fiber commonly comes with an orange jacket but has a core size of 50µm instead of 62.5µm. It also typically operates at 850 nm/1300 nm. It supports 10 Gigabit Ethernet at lengths up to 82 meters but is more commonly used for 1 Gigabit Ethernet applications. The 50/125µm OM2 multimode fiber was first invented by Corning in the 1970s and gradually became popular and even the first choice for newly established networks for it supports longer transmission distance and higher bandwidth.

Note: OM1and OM2 fiber are both orange jacket fiber and work well with LED based equipment.

OM3 Fiber

OM3 fiber is 50µm core diameter with aqua jacket. Optimized for lased based equipment which needs fewer mode of light, it is capable of being applied in 10 Gigabit Ethernet at strengths up to 300 meters. The 50/125 µm OM3 fiber is considered to be the best choice for 10 Gigabit Ethernet unless you need the extra distance provided by OM4. Enhancements on its inception and production technologies enable OM3 to be used in 40 Gigabit and 100 Gigabit Ethernet at lengths up to 100 meters.

OM4 Fiber

OM4 fiber has the same core size and jacket color as OM3 fiber. It is also optimized for laser based equipment. As a further development of OM3 fiber, it can support 10 Gigabit Ethernet at lengths up 550 meters and 100G Gigabit Ethernet at lengths up 150 meters. Now as the rapid development of 40G and 100G Gigabit Ethernet, OM4 fiber is widely applied especially in data centers. It provides the most cost effective solutions for data centers by avoiding the higher costs associated with single-mode laser source.OM1 Fiber and OM4 Fiber

For more information, please visit Fiberstore

Multimode Fiber Patch Cables from Fiberstore

Fiberstore has been providing quality fiber optical cabling and connectivity solutions to datacomm and telecommunication industries to worldwide customers for over ten years. As a specialized fiber optic cables and patch cables manufacturer, we have conducted rigorous quality controls on each manufacture steps, to make sure that all of our fiber optic cables are completely ROHS and REACH compliant. Our fiber optic patch cables are classified to common multimode fiber cables (OM1, OM2, OM3, OM4 patch cables), armored fiber patch cables, related fiber cables, MTP/MPO trunk cables, multi-core fiber patch cables as well as many other fiber patch cables. This article is set up to mainly introduce the multi-core fiber patch cords.

Multi-core fiber patch cable get its name as it is consist of multi core fiber, which also called multimode fiber patch cable. Multi fiber patch cable is most commonly used for trunk cable plant and can be as the distribution or breakout patch cable. We offer the fiber trunk patch cables with SC, LC, FC, ST, MTRJ, MU, E2000 connectors, 2-288 cores/fibers are optional to be customized and the sub-branch can be 0.9 mm and 2.0 mm.


For each connector type, like LC, there are LC to FC, LC to SC, LC to ST, LC to MTRJ, LC to MU, LC to E2000, LC to SMA and LC to LC fiber cable, all of which are optically and electrically inspected and tested using accepted industry test procedures as recommended by the most current version of ANSI/TIA-455B standard test procedure for standard fiber optic fiber, cables, transducers, sensors, connecting & terminating devices, and other components.

The multi fiber patch cables features include:

  • Multi-fiber channel options
  • Various option of fiber and connector types
  • Standard or custom configurations
  • Easy to use, easy to install and maintain
  • Low insertion loss and back reflection
  • Custom defined specifications
  • Environmentally stable
  • Complete with orange OFNR rated riser/jacket
  • 100% optically tested to ensure high performance
  • According to different requirements, 4 to 966 cores are available


  • FTTH, LAN, Test equipment, Military industry
  • CATV
  • Outside plant
  • Premise networks
  • Aerial distribution
  • Measuring equipment
  • Fiber optic communication system
  • Optical active component and equipment

We offer custom service for customers with options of any fiber type, any connectors, and lengths and even customer logo and label on fiber patch cables. Fiber types is selectable from 10G OM3, OM4 optical fiber, single mode 9/125 optical fiber, OM1, OM2 multimode 50/125 fibers.