Archived — Fiber Optic Technology

Parameter Multimode Single Mode   62.5/125um TIA 492AAAA (OM1) 50/125um TIA 492AAAB (OM2) 850nm Laser-Optimized 50/125um TIA 492AAAC (OM3) TIA 492CAAA (OS1) TIA 492CAAB (OS2) Application Nominal Wavelegnth (nm) 850 1300 850 1300 850 1300 1310 1550 Ethernet 10/100Base-SX Channel Attenuation (dB) 4.0   4.0   4.0       Supportable distance meter (feet) 300 (984)   300 (984)   300 (984)       Ethernet 100Base-FX Channel Attenuation (dB)   11.0   6.0   6.0     Supportable distance meter (feet)   2000 (6,850)   2000 (6,850)   2000 (6,850)     Ethernet 1000Base-SX Channel Attenuation (dB) 2.6

>> What is Intensity Modulation with Direct Detection (IM/DD)? Current fiber optic lightwave communication systems are based on a simple digital transmission scheme in which an electrical bit stream is used to modulate the intensity of the optical carrier, and the optical signal is detected directly at a photodiode to convert it to the original digital signal in the electrical domain. Such a scheme is referred to as intensity modulation with direct detection (IM/DD). >> What is Coherent Optical Communication? In contrast to intensity modulation with direct detection (IM/DD), many alternative schemes, well known in the context of radio and

In the past, companies often had several cabling infrastructures because no single cabling system would support all of a company’s applications. Nowadays, a standardized cabling system is important not only for consumers but also for vendors and cabling installers. Vendors must clearly understand how to design and build products that will operate on a universal cabling system. Cable installers need to understand what products can be used, proper installation techniques and practices, and how to test installed systems. In this tutorial, we will cover some of the important topics related to cabling standards. Identify the key elements of the ANSI/TIA-568-C

Chromatic dispersion is the term given to the phenomenon by which different spectral components of a pulse travel at different velocities. To understand the effect of chromatic dispersion, we must understand the significance of the propagation constant β. We will restrict our discussion to single mode fiber since in the case of multimode fiber, the effects of intermodal dispersion usually overshadow those of chromatic dispersion. So the propagation constant β in our discussions will be that associated with the fundamental mode of the fiber. Chromatic dispersion arises for two reasons. The first reason is that the refractive index of silica,

>> Effective Length Le The nonlinear interactions in optical fibers depends on the transmission length and the cross-sectional area of the fiber. The longer the link length, the more the interaction and the worse the effect of nonlinearity. However, as the signal propagates along the link, its power decreases because of fiber attenuation. Thus, most of the nonlinear effects occur early in the fiber span and diminish as the signal propagates. Modeling this effect can be quite complicated, but in practice, a simple model that assumes that the power is constant over a certain effective length Le has proved to