Category Archives: 100G & 400G

40 Gigabit Duplex Fiber Solutions

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There’s been a lot of talk lately surrounding bidirectional 40 Gb/s duplex applications, or BiDi for short. Currently offered as a solution by Cisco®, BiDi runs over duplex OM3 or OM4 multimode fiber using QSFP modules and wavelength division multiplexing (WDM) technology. It features two 20 Gb/s channels, each transmitting and receiving simultaneously over two wavelengths on a single fiber strand – one direction transmitting in the 832 to 868 nanometer (nm) wavelength range and the other receiving in the 882 to 918 nm wavelength…

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How to clean MPO Connector and MPO Adaptor

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a) Connector Ferrule – Exposed EndFace 1) Dry Cleaning: Using a reel-based cassette cleaner with medium pressure, wipe against the dry cleaning cloth (single swipe per exposure) in one direction. There are special cleaners available, which can be used for the pinned and the unpinned (PC and APC polished) MPO connectors. For APC MPO connectors, ensure that the entire endface surface mates with the cleaning cloth. Dry cleaning will generally remove airborne contamination and should be attempted first. Always inspect the connector endface for contamination…

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Time to migrating to 40G/100G

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Data growth. The world revolves around digital data. We now rely on data to conduct business, engage in social activities and manage our lives. There is no sign of slowed growth in the production of, and demand for, more data – as well as faster access to it. According to the 2014 IDC Digital Universe Study sponsored by EMC [1]: “Like the physical universe, the digital universe is large – by 2020 containing nearly as many digital bits as there are stars in the universe.…

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Fiber Considerations for 100 Gig – 3

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Fiber Requirements Point to OM4 OM4 fiber offers a minimum effective modal bandwidth (EMB) of 4700 megahertz kilometer (MHz•km) at 850 nanometers (nm) compared with 2000 MHz•km for OM3. Both OM3 and OM4 fibers are 50 micron (µm) laser-optimized fibers with extended bandwidth and were designed to enhance the system cost benefits enabled by 850 nm VCSELs for laser-based 10, 40 and 100 Gb/s applications. They also are backwards compatible, with applications calling for overfilled launch (OFL) bandwidth of at least 500 MHz•km at 1300…

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Fiber Considerations for 100 Gig – 2

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Network Design and Layout As in previous Ethernet standards, 40 Gb/s and 100 Gb/s define several different Physical layer (PHY) implementations for transmitting information over various distances and media types. These media types include multimode and singlemode optical fiber cabling and some form of copper cabling. Additionally, various transceiver types are defined, distinguished by which media they are intended for and how far they transmit. Table 1 above lists the PMD devices that were adopted by IEEE 802.3ba, along with their media type and minimum…

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Fiber Considerations for 100 Gig – 1

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The unrelenting demand for band width in the enterprise, and the resulting need for high-capacity, high-performance computing, is generating ever-faster network speeds. But 100 gigabits per second (Gb/s)? This would have seemed like a pipe dream 10 years ago, but it is now a fact of life in today’s enterprise networks and data centers. What, specifically, is driving this demand? The major factors are familiar by now—bandwidth-intensive applications such as video over the Internet (e.g., You Tube, Hulu, Netflix); rapid advancement in research and development…

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8-fiber-to-12-fiber conversion cords highlight 40- and 100-G cabling solution

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A new 40/100G Fiber Cabling Solutions “that provide a simple economical and fast path from 10 Gigabit to 40G or 100 Gigabit applications, The new products are advanced Fiber Optic Cabling Solutions and “include a variety of equipment cords that allow customers to maintain and fully utilize their existing Plug and Play enclosures and trunks for next-generation 40/100 Gigabit performance.” Among the newly announced products is a fiber conversion cord with two 12-fiber MTP connectors on one end and three 8-fiber MTP connectors on the…

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The Challenges of Data Transmission toward Tbps Line rate in DWDM System for Long haul Transmission

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1. Introduction Since the late 1990, the transport capacities of ultra-long haul and long haul optical fiber communication systems has been significantly increased by the introduction of EDFA (Erbium Dropped Fiber Amplifier), DWDM, DCM (Dispersion Compensation Module), and FEC (Forward Error Correction) technologies. By utilizing these technologies, the universal on/off-keying (OOK) modulation along with direct detection receiver technology has been sufficient to address data rate up to 10Gbps per wavelength. An effort to improve spectral efficiency and robustness against transmission impairments, such as chromatic dispersion…

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How to clean SFP (SFFP), XFP, CFP, MSA Transceivers

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Most SFP (small form-factor pluggable) module transmitters have an LC (Simplex or duplex) or SC connector with a stub. It is relatively easy to clean following the standard connector if you follow the following cleaning steps: However, the SFP receiver can have an air gap chamber or an internal lens, which makes cleaning and inspecting them much more difficult. because it is not clear to see the inspection image by Fiber Optic Microscope for the internal design. Follow the steps listed below to have a…

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Multiplexores CWDM extensores

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IHSE ha anunciado el lanzamiento de dos nuevos multiplexores CWDM Draco para cuatro u ocho conexiones de fibra bidireccionales en tareas de extensión de señal KVM sobre grandes distancias. Funcionan como extensores KVM y consisten en dos unidades (en la estación de trabajo y en la CPU remota) que pueden ampliar las señales hasta 140 metros con cable Cat X y hasta 10 kilómetros con cable de fibra óptica monomodo. La multiplexación de diferentes conexiones de fibra es posible mediante el uso de los nuevos…

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