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Four Benefits of Protecting Your Optical Fiber In A Test Environment

Posted by John Kornegay on Mon, Sep 10, 2018 @ 15:09 PM

If you are in the line of work where you are simulating networks using optical fiber, it is safe to assume that you have a few spools of bare fiber sitting in your test environment. The importance of ensuring your fiber-based network devices will work as envisioned before deployment in the field is vital. However, running simulations using unprotected or unsecured spools fiber can prevent you from producing the maximum results due to challenges that can arise.

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Topics: fiber optic test, fiber test, data center simulation, Network Optimization

Sources of Latency in a Financial Communications Network

Posted by John Kornegay on Tue, Aug 14, 2018 @ 10:08 AM

 

The world’s financial communication networks are a paradigm of the modern world, and they operate at very high speeds through necessity, often using fiber optic technology. So fine are the lines between success and failure in today’s trading environment that just tiny fractions of seconds do matter. When financial institutions trade via these networks, shaving microseconds off network latency can result in a significant competitive advantage and millions of dollars annually. To reduce latency, one must understand the factors that can cause latency.

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Topics: fiber latency, Network Optimization, Financial Networks

The Importance of Optical Detectors

Posted by George Zhu on Tue, Jul 24, 2018 @ 18:07 PM
In the previous article, I briefly explained and compared two types of optical sources used in transmitters: LED and LD. Today, I am going to discuss what happens at the other end of a fiber link -- detectors. Optical detectors, as the name implied, can detect the amount of light received. Our very own eyes are a pair of detectors as they can receive light information with the retina and transmit that light data to our brain. In the visible light spectrum, our eyes are great detectors to inspect fiber break or light leakage. However, most fiber works in the invisible wavelength spectrum where human eyes won't be able to see. That is the where the optical detectors come in .
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Topics: graded-index fiber,, optical detectors

Why Is Latency So Important In Financial Networks?

Posted by John Kornegay on Tue, Jul 10, 2018 @ 12:07 PM

When talking about computers, latency is a word used to describe how long after you input a command that the results of that command are displayed on the screen. In technical terms, it’s the measured delay involved getting a datagram or packet from one hardware location to another and so obviously, the lower the latency, the better performing the device or network is.

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Topics: latency, Financial Networks

15 Best Blogs to Follow About Network Optimization

Posted by John Kornegay on Wed, Mar 7, 2018 @ 15:03 PM

Network optimization is pretty challenging and requires effort and expertise. However, as they say, the bitter the challenge, the sweeter the reward. Before you dive into it, do the right amount of research. Once you get the hang of it, the results will amaze you and, well, others!

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Topics: network simulation, Network Optimization

Understanding Radiation Resistant Fiber: What you need to know

Posted by George Zhu on Thu, Jan 11, 2018 @ 16:01 PM

 Under the ideal environment condition, the primary fiber attenuation in single mode fiber comes from intrinsic characteristics of the glass and is usually less than 0.2 dB/km. However, when the fiber is exposed to high radiation environment for an extended period, for example in a nuclear facility, the fiber's Radiation-Induced Attenuation (RIA) will accumulate and become fiber's dominant source of loss as the electrons are trapped in the glass due to ionizing radiation. It also takes time for the fiber to recover from the radiation after the radiation source is removed. Depending on the temperature, radiation doses, and radiation sources, the fiber may or may not recover to its original state.

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Topics: om4 fiber, om3 fiber, multimode fiber, corning clearcurve, step-index fiber,, graded-index fiber,

Multimode Graded Index Fiber: What It Is And Why You Need To Know

Posted by George Zhu on Wed, Jan 3, 2018 @ 11:01 AM

Graded-Index Fiber, also known as G.651.1 under International Telecommunication Union (ITU) standards, is a type of fiber whose refractive index decreases gradually as the radial distance (distance to the core center) increases. In comparison, what we commonly have seen is G.652.D fiber which has a step-index refractive index profile. This article will compare graded-index multimode fiber with traditional step-index fiber, as well as its advantages when dealing with modal dispersion, a common signal distortion error.

The graph below shows the different refractive index profiles of the fiber core and cladding.

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Topics: om4 fiber, om3 fiber, multimode fiber, corning clearcurve, step-index fiber,, graded-index fiber,

An Introduction to Large Core Optical Fibers

Posted by George Zhu on Thu, Sep 28, 2017 @ 10:09 AM

The most common multimode optical fibers, which allow multiple light modes to propogate along the link simultaneously, are designed with a core diameter size of 50µm for for high-speed communications networks.  You may recognize these types of fibers by industry specifications such as OM2, OM3, and OM4 or by brand names like Corning® ClearCurve® and OFS® LaserWave®.

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Topics: optical fibers, specialty optical fibers, medical fibers, high power lasers, large core fibers, multimode optical fibers

How Does a Dispersion Compensating Fiber Reduce Chromatic Dispersion?

Posted by George Zhu on Thu, Apr 27, 2017 @ 16:04 PM

An important factor in the performance of fiber optic communications systems, chromatic dispersion is a topic and performance characteristic that is important to both understand and account for when operating and/or designing equipment for fiber-based networks.

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Topics: optical fiber, refractive index, chromatic dispersion, dispersion compensating fiber, dispersion compensating module

Buying Optical Fiber for Network Testing and Latency Applications

Posted by Kevin Miller on Fri, Mar 31, 2017 @ 15:03 PM

When the time comes to buy spools of optical fiber for testing and demonstrating communications systems, there are a few items to consider that will help ensure you end up with an ideal setup.  Since it has been proven that following a few best practices will help you get the most out of your fiber, thinking about these four important items in advance will allow you to further qualify your needs as well as speed up the purchasing process.

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Topics: optical fiber, fiber spools, fiber latency, network simulation, fiber network simulation, buy optical fiber, optical time delay