![]() ![]() Single Mode jacket color is typically yellow for jumpers but you may see a variety of colors depending on the application and the outer jacket type. For this reason, Multimode is generally only used for short distance applications like data centers. However, on longer cable runs, multiple paths of light can cause distortion at the receiving end, resulting in an unclear and incomplete data transmission. This allows for higher bandwidth over short to medium distances. Multimode cable disperses the light into multiple paths as it travels down the core. Multimode fibers are identified by the OM (optical mode) designation and their specifications are outlined by the ISO/IEC 11801 standard. Multimode Fibers – OM1, OM2, OM3, OM4 and OM5 This section will review the more technical naming conventions and specifications for both Multimode and Single Mode Fiber. Well what does that mean? What is OM3 or OM4 Fiber? Every now and then you may have a more technical customer that asks for Fiber cable but gives you a specific type like OM3 fiber. They may rely on you to decide the exact type of fiber they need. They may be able to give you some specifics but not always. Typically customers will ask for either multimode or single mode fiber cable. The Optical Core – a glass tube (core) propagates the light signals through the fiber cable. To further simplify it – light on = 1, light off = 0. For Fiber Optics, again keeping it as simple as possible, the presence of a light pulse at a certain time is a one (1) while the absence of a light pulse is a zero (0). A laser source inside the hardware is used to turn the light on and off. The same principle is used for fiber optics only instead of electrical pulses we use pulses of light. To keep it really simple, the presence of a pulse at a certain time is a one (1) and the absence of a pulse is a zero (0). For copper, the difference between a one and a zero is a change or variation in the electric pulse within a certain acceptable range. For digital communication we transmit in ones and zeros. ![]() Just as copper cables use pulses of electricity to carry signals across a copy wire, Fiber Optic cable uses pulses of light. Some Fiber Basics: Transmitting Signals with Lightĭigital Light Signals – Lasers inside the equipment generate the light that the fiber cables carry. Having a general understanding of fiber optics and the different fiber and connector types that are available will allow you to have a more productive conversation with your customer. Fiber Optic connectors and cables are present in nearly every communications project that we might sell into, be it a DAS installation or a Base Station with wireless backhaul, you can be certain that fiber jumpers and cabling are being used somewhere in that network. ![]()
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