Fiber-Mart, worldwide leading supplier in fiber optic network, fttx, fiber cabling, fiber testing.

by www.fiber-mart.com 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 range. Avago Technologies also offers a similar QSFP BiDi transceiver.   Unidirectional 40 Gb/s duplex fiber solutions are available from Arista and Juniper. These differ from the BiDi solution in that they combine four 10 Gb/s channels at different wavelengths – 1270, 1290, 1310, and 1330 nm – over a duplex LC connector using OM3 or OM4 multimode or  singlemode fiber . These unidirectional solutions are not interoperable ...

by www.fiber-mart.com Many applications are pursuing the high bandwidth throughput, therefore using high-density patching is inevitable. But is there any good solution for high-density structured cabling? Definitely, MTP/MPO system solves your trouble with a wide range of MTP/MPO assemblies. It is a technique enabling multi-fiber connections to be used for data transmission. The high fiber count creates the endless possibilities of high-density patching. The easy installation of MTP/MPO assemblies also saves lots of operating time. This article will introduce some regular MTP/MPO products and their common applications.   Common MTP/MPO Products To accommodate the needs for high speed networks, MTP/MPO system has many optics to fit for different applications. There are usually MTP/MPO cables, MTP/MPO cassettes, MTP/MPO optical adapter and MTP/MPO adapter panels.   MTP/MPO cables  are terminated with MTP/MPO connectors at one end or both ends. The fiber types a...

by www.fiber-mart.com In telecommunication, fiber loopback is a hardware designed to provide a media of return patch for a fiber optic signal, which is typically used for fiber optic testing or network restorations. When we need to know whether our fiber optic transceiver is working perfectly, we can use a  fiber loopback cable  as an economic way to check and ensure it. Basically, the loopback aids in debugging the physical connection problem of the transceiver by directly routing the laser signal from the transmitter port back to the receiver port. Since fiber optic transceivers have different interface types and connect different types of cables, it is not that simple to choose a right loopback for our transceiver. This post will be a guide on how to choose a right loopback cable for specific transceiver module.   Fiber Loopback Types and Configurations Before deciding which loopback cable to use, we should firstly know the structure and classification of fibe...

by www.fiber-mart.com Fiber multiplexer  is powerful communications equipment. They allow mixing of T1/E1, Ethernet, POTS ports (FXO or FXS) and serial datacom interfaces such as V.35, RS-232, X.21 etc. Together on a single circuit of fiber optic, so that fiber is saved and higher density and capacity networks can be put together. fiber-mart multiplexers are supported by industry leadership in fiber optic development, including optical sensors, telemetry systems, connector design, ruggedized optics, and the widest selection of Fiber Optic Rotary Joints (FORJs). All of these fiber optic multiplexers supports remote management and have optional service line ports. Capacity starts with 4T1 or E1 interfaces on low entry models and goes up to 63T1Ss or E1s together on a single strand of fiber optic cable.   Typical optical multiplexers are Video & Data & Audio Multiplexers, PDH Multiplexer. Custom solutions provide support for additional signal formats or unique comb...

by www.fiber-mart.com Network operators have the common basic target to produce cost-efficient telecommunication services. When considering operators from different nations including carriers operating worldwide, a variety of network architecture designs need to be considered. The suitable network design depends on the individual national properties with respect to the telecommunication services to be provided, such as the local population density distributions, the characteristic local residential consumer behavior, for example, the demand for voice telephony, internet protocol, or broadband TV, or the distribution and service level agreement (SLA) requirements of the business customers. The design of the network is governed by the topology. DWDM network for example, ring, star, mesh, by the purpose (access, aggregation, transport), by the mean and maximum link distance, and by the density and degree of switching or grooming nodes. All this has a direct impact on the choice of ampl...

by www.fiber-mart.com We know  Fiber Optical Amplifiers  that design from simple single stage to more complex multistage amplifiers with variable gain evolved as a different viator for system performance by equipment manufacturers and were initially made in house. More recently, the equipment vendors outsourced the design and manufacturing of amplifiers to the component vendors while requiring more than one source in order to control cost and delivery risk. This led to a pseudo-standardization of optical amplifiers with three or four vendors making amplifiers with compatible optical, mechanical,electrical hardware, and software specification.   Optical amplifier is dominated by erbium-doped fiber amplifiers and the leading suppliers have been shipping amplifiers for 10 years or longer. These companies include Oclaro, JDS Uniphase, and Furukawa. Ovum estimates these companies enjoy more than 60% market share of the nearly 200 dollars merchant erbium-doped fiber ampl...

by www.fiber-mart.com Because of the rapid development of data services, the speed of network convergence is accelerating, MAN is becoming a focus of network construction, market competition pressure makes the telecom operators more sensitive to the cost of network. Aimed at the demand of the market, low-cost MAN CWDM products arises at the moment.   With full spectrum CWDM league (FCA) vigorously promote of CWDM Technology and ITU-T for the standardization of CWDM, it makes  CWDM technology equipment manufacturers  and operators be the focus of attention. The ITU-T 15th team through CWDM wavelength grid of standard G.694.2, and become a milestone in the history of the development of CWDM technology. The 15th team also puts forward the definition of CWDM system interface right app draft standard. Shanghai bell and other companies in China in the standardization of CWDM technology also has made certain contribution, relevant domestic standards are also under discuss...

by www.fiber-mart.com As an extension of wavelength division multiplexing (WDM), coarse wavelength division multiplexing (CWDM) is a technology that multiplexes a number of optical carrier signals onto a single optical fiber through the use of different wavelengths (i.e., colors) of laser light. A CWDM SFP (Small Form-factor Pluggable) transceiver is a hot-swappable input/output device that plugs into an SFP port or slot of a switch or router, linking the port with the fiber-optic network. It is a  kind of optical-electric/electric-optical converter. With the transmitter on one end, the CWDM SFP transceiver takes in and converts the electrical signal into light, after the optical fiber transmission in the fiber cable plant, the receiver end again converts the light signal into electrical signal. The following figure shows the CWDM SFP transceiver in the CWDM system. In the figure, TX represents “transmit”, RX represents “receive”. Being a kind of compact optical transceiver, CWD...

by www.fiber-mart.com Cisco Catalyst 6500 series switches  provide multiple slot choices—3-, 6-, 9-, 9-Vertical and 13-slot of different chassis. They offer the broadest range of interface modules with industry-leading performance and advanced feature integration. Catalyst 6500 Series switches feature an unparalleled range of integrated services modules, including multi-gigabit network security, content switching, telephony, and network analysis modules. There are five available 6500 series switch models in total, which would be mainly presented in the following.   Cisco Catalyst 6513-E Switch Cisco Catalyst 6509-E Switch Cisco Catalyst 6506-E Switch Cisco Catalyst 6504-E Switch Cisco Catalyst 6503-E Switch   Features & Benefits —High security The 6500 Series switches integrate proven, multi-gigabit Cisco security solutions, including intrusion detection, firewall, VPN, and Secure Sockets Layer (SSL) into existing networks.   —High scal...

by www.fiber-mart.com Fiber optic cables  are constructed in the loose tube and tight buffered. In the past two decades, tight-buffered fiber optic cable has been sufficiently proved to be suitable for both indoor and outdoor applications. One of the main reason is that tight-buffered cables provide fast, easy, economical termination which satisfies the diverse requirements existing in high performance fiber optic applications. Distribution fiber optic cable is also a tight buffered design, which is ideal for applications requiring a single termination point with multiple fibers. Therefore, tight-buffered fiber distribution cable is usually installed in the intra-building backbone and inter-building campus locations, and it provides plenum and riser rated fiber cables for indoor and outdoor applications.   What Is Tight-Buffered Fiber Distribution Cable? Tight-buffered fiber distribution cable consists of several tight-buffered fibers consolidated in a single cable. C...

by www.fiber-mart.com Since the transmission protocols progress to higher and higher data rates, local area network (LAN) campus, building backbones and data centers are expected to employ cables with greater fiber counts, aiming to meet the accelerating system bandwidth needs.  Ribbon fiber cable  on account of their high coupling fiber optic cable capabilities becomes an ideal tool for data centers as well as limited indoor environment. Then what is ribbon fiber optic cable? Why it has an important influence on optimizing network capacity? Read this ribbon fiber wiki for more info.   Ribbon Fiber Overview Usually, a ribbon fiber cable consists of individual fibers aligned in a single row on the same flat plane, which explains its name “ribbon fiber cable” or “flat ribbon cable”. Each ribbon can have between 4 and 24 fibers. With this special cable structure, ribbon fiber cables enable mass-fusion splicing, with 12 fibers spliced in a single procedure for easier...

by www.fiber-mart.com Inside plant refers to the cabling running inside a building. Similarly, outside plant is the cabling running outdoors. Outside plant cables are thicker because of more durable insulation jackets. As for fiber optic communication, there are many types of outside plant fiber optic cables. Some have extra protections to prevent corrosion and other elemental interference. Outside plant fiber optics are widely used in telephone networks, CATV, metropolitan networks, utilities and so on. If you want to choose the right outside plant fiber optic cable, its applicable environment is an important factor for consideration. This post will introduce some common outside plant fiber optic cables and typical outdoor application environments.   Several Types of Outside Plant Fiber Optic Cables Outdoor Breakout Cable Outdoor breakout cable is perfect for rugged applications and installations that require increased performance. It is usually made of several bundled ...

by www.fiber-mart.com In any fiber optic cable installation, the way the cables are attached to the system–is vital to the success of the telecommunications network. If done well, the connection allows optical signals to pass with low attenuation and little return loss. One of the proven ways to join optical fibers is with a  fiber pigtail –a fiber cable with a installed connector on one end and unterminated fiber on the other end.   Pigtails are basically cable assemblies. Ninety-nine percent of singlemode applications use pigtails, also used in many multimode applications. One of the benefits of using pigtail is lower labor costs. The end of the pigtail is stripped back and fusion spliced to another single fiber. This is done easy in field with a multi-fiber trunk to break out the multi-fibers cable into its component for connection to the end equipment. Installers working with singlemode fiber typically have access to a fusion splicer–an expensive piece of equipment ...

by www.fiber-mart.com What is  Fiber Optical Transponder ?   As we know, transponder is important in optical fiber communications, it is the element that sends and receives the optical signal from a fiber. A transponder is typically characterized by its data and the maximum distance the signal can travel.   Functions of a Fiber Optical Transponder includes:   Electrical and optical signals conversion Serialzation and deserialization Control and monitoring Applications of Fiber Optical Transponder   Multi-rate, bidirectional fiber transponders convert short-reach 10gb/s and 40 gb/s optical signals to long-reach, single-mode dense wavelength division multiplexing (DWDM) optical interfaces.   The modules can be used to enable DWDM applications such as fiber relief, wavelength services, and Metro optical DWDM access overtay on existing optical infrastructure.   Supporting dense wavelength multiplexing schemes, fiber optic t...