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What are Fiber Optic Patch Cables

Fiber optic patch cable, often called fiber optic patch cord or fiber jumper cable, is a fiber optic cable terminated with fiber optic connectors on both ends. It has two major application areas: computer work station to outlet and fiber optic patch panels or optical cross connect distribution center. Fiber optic patch cables are for indoor applications only.

Types of fiber optic patch cables
Fiber optic patch cables can be divided into different types based on fiber cable mode, cable structure, connector types, connector polishing types and cable sizes.

Fiber optic patch Cable Mode:

1. Single mode fiber patch cables:  Single mode fiber optic patch cables use 9/125 micron bulk single mode fiber cable and single mode fiber optic connectors at both ends. Single mode fiber optic cable jacket color is usually yellow. Here is the explanation of what is single mode and single mode fiber.

2. Multimode fiber patch cables: Multimode fiber optic patch cables use 62.5/125 micron or 50/125 micron bulk multimode fiber cable and terminated with multimode fiber optic connectors at both ends.  Multimode fiber optic cable jacket color is usually orange. Here is the explanation of what is multimode and multimode fiber.

3. 10gig multimode fiber optic patch cables:  10Gig multimode fibers are specially designed 50/125 micron fiber optimized for 850nm VCSEL laser based 10Gig Ethernet. They are backward compatible with existing network equipment and provide close to three times the bandwidth of traditional 62.5/125 multimode fibers. 10 Gigabit is rated for distances up to 300 meters using 850nm Vertical Cavity Surface Emitting Lasers (VCSEL). 10Gig fiber optic cable jacket is usually aqua.

Fiber patch Cable Structure:

1. Simplex fiber optic patch cables: Simplex fiber patch cable has one fiber and one connector on each end.

2. Duplex fiber optic patch cables: Duplex fiber patch cable has two fibers and two connectors on each end. Each fiber is marked “A” or “B” or different colored connector boots are used to mark polarity.

3. Ribbon fan-out cable assembly: For ribbon fan-out cable assembly, one end is ribbon fiber with multi fibers and one ribbon fiber connector such as MTP connector (12 fibers), the other end is multi simplex fiber cables with connectors such as ST, SC, LC, etc.

Source: fiber optic cable manufacturer

Fbt Coupler Fiber Optic Patch Cables And Dwdm Sfp Transceiver

Fiber optic splitter is used to split the fiber optic light into several parts at a certain ratio. We use fiber optic splitter to distribute or combine optical signals in many applications, such as FTTH solution, etc. Fiber optic splitters are important passive components used in FTTX networks. Fiber optic splitters can be terminated with different kinds of connectors, the main package could be box type or stainless tube type, one is usually used with 2mm or 3mm outer diameter cable, the other is usually used with 0.9mm outer diameter cables.

Two kinds of fiber splitters are popular used, one is the traditional fused type fiber optic splitter (FBT coupler), which features competitive prices; the other is PLC fiber optic splitter, which is compact size and suit for density applications. Both of them have its advantages to suit for different requirement. FBT Couplers are designed for power splitting and tapping telecommunication equipment, CATV networks, and test equipment. These components are available individually or integrated into modules for fiber protection switching, MUX/DMUX, optical channel monitoring, and add/drop multiplexing applications.

Major differences between PLC splitters and FBT Coupler

1. Technology behind FBT Coupler and PLC splitter.
FBT coupler: Fused Biconical Taper, this is traditional technology to weld several fiber together from side of the fiber.
PLC splitter: Planar Lightwave Circuit is a micro-optical components product, the use of lithography, the semiconductor substrate in the medium or the formation of optical waveguide, to achieve
branch distribution function.

2. Disadvantages and advantages between FBT and PLC.
PLC splitter FBT coupler
SpliSplit Ratio (Max) 1*64 splits 1*4 splits
EveEveness Can split light evenly Eveness is not very precise
SizeSizeSize Compact size Big size for multi splits

Fiber Patch Cable also known as fiber jumper or fiber patch cord, which is a fiber optic cable terminated with fiber optic connectors on both ends. There are two major application areas of Fiber
Patch Cable: computer work station to outlet and fiber optic patch panels or optical cross connect distribution center. Fiber optic patch cables are for indoor applications only. Single-mode fiber
Patch cable is primarily used for applications involving extensive distances. Multimode fiber optic patch cord, however, is the cable of choice for most common local fiber systems as the devices for multimode are far cheaper.

Jfiberoptic Dense Wavelength Division Multiplexing (DWDM) Small Form-Factor Pluggable (SFP) is available in all 100 GHz C-band wavelengths on the DWDM ITU grid. They are designed to Multi-Source Agreement (MSA) standards to ensure broad network equipment compatibility. As multirate interfaces they support any protocol from 100 Mbps to 4.25 Gbps. DWDM SFP transceivers provide the high speeds and physical compactness that today’s networks require while delivering the deployment flexibility and inventory control that network administrators demand. The 1.25G DWDM SFP transceivers are small form factor pluggable modules for bi-directional serial optical data communications such as 4x/2x/1x Fibre Channel, SDH/SONET, Ethernet applications. We supply 1.25G DWDM SFP modules are hot pluggable and digital diagnostic functions area vailable via an I2C serial bus specified in the SFP MSA SFF-8472. The DWDM SFP transceiver has undergone rigorous qualification and certification testing to provide End-to-End Compatibility using switching equipment from CISCO, BROCADE, JUNIPER, ALCATEL, HP (select models), NORTEL, EMC, QLOGIC and other OEMs.

Fiber optic patch cord info from http://www.jfiberopt.com

Zayo boosts Indianapolis 500 small cell network with fiber-optic ring

Zayo Group reveals that it will deploy a dark fiber mobile backhaul infrastructure for a small cell wireless network at this year’s Indianapolis 500 in Indianapolis, IN. The fiber-optic network services provider already has installed a dark fiber ring for the track, which will improve wireless capacity and reliability during the race’s events. The fiber infrastructure will then remain in place to support mobile users.

The fiber optic cable will backhaul traffic from a distributed antenna system (DAS) deployed at the Indianapolis Motor Speedway. The backhaul network includes a 23-mile fiber ring connecting an unidentified national carrier’s multiple points of presence and the speedway. Zayo asserts it completed the dark fiber ring in fewer than 90 days.

Zayo says it manages more than 540 fiber route miles in the Indianapolis metro area and supports service to more than 300 buildings on-net.

The Types of Fiber Optic Connector

Fiber optic connector is used to join optical fiber where a connect/disconnect capability is required. The basic connector unit is a connector assembly. A connector assembly consists of an adapter and two connector plugs. A variety of optical fiber connectors are available, but SC and LC connectors are the most common types of connectors on the market.

Different connectors are required for multimode, and for single-mode fibers. The example shown is a fiber ST connector. We supply professional fiber ST connetor sales. ST connector is the most popular connector for multimode networks, like most buildings and campuses. It has a bayonet mount and a long cylindrical ferrule to hold the fiber. Most ferrules are ceramic, but some are metal or plastic. And because they are spring-loaded, you have to make sure they are seated properly. If you have high loss, reconnect them to see if it makes a difference.It has a long 2.5mm diameter ferrule made of ceramic (zirconia), stainless alloy or plastic. It mates with a interconnection adapter and is latched into place by twisting to engage a spring-loaded bayonet socket.

Instead a fiber mating sleeve sits is very important. Unlike electronic connectors, most fiber optic connectors don’t have jack and plug design. Instead a fiber mating sleeve (adapter, or coupler) sits between two connectors. At the center of the adapter there is a cylindrical sleeve made of ceramic (zirconia) or phosphor bronze. Ferrules slide into the sleeve and mate to each other. The adapter body provides mechanism to hold the connector bodies such as snap-in, push-and-latch, twist-on or screwed-on. The total amount of insertion loss for fiber optic connectors should remain below 1 dB. Fiber alignment is the critical parameter in maintaining the total insertion loss below the required level. There is only a small amount of control over coupling loss resulting from fiber mismatches, because the loss results from inherent fiber properties.

Jfiberoptic as the main professional fiber optic cable manufacturer in china offer a various kinds of fiber optic connectors, FC Connectors, LC Connectors, SC Connectors, ST Connectors. You can buy fiber optic connection products on our store with your confidence. All of fiber optics supplies with high quality but low price.

Types of Fiber Optical Attenuator

Two types of fiber optic attenuators:

1. fixed value attenuators
2. variable optical attenuators.

Fixed value attenuators have fixed values that are specified by decibels. Their applications include telecommunication networks, optical fiber test facility, Lan(LAN) and CATV systems. For instance, a -3dB attenuator should reduce concentration of the output by 3 dB(50%). Fixed value attenuator’s attenuation value can’t be varied. The attenuation is expressed in dB. The operating wavelength for optical attenuators ought to be specified for that rated attenuation, because optical attenuation of a material varies with wavelength. Fixed value attenuators are comprised of two big groups: In-line type and connector type. In-line type appears like an ordinary fiber patch cable; it has a fiber cable terminated with two connectors which you’ll specify types. Connector type attenuator looks like a bulk head fiber connector, it has a male end and a female end. It mates to regular connectors of the identical type for example FC, ST, SC and LC.

Variable fiber optical attenuators come with a variety of designs. They’re general used for testing and measurement, but they also possess a wide usage in EDFAs for equalizing the sunshine power among different channels. One type of variable optical attenuator is made on the D-shaped fiber as a type of evanescent field device. If your bulk external material, whose refractive index is larger compared to mode effective index, replaces a part of the evanescent field reachable cladding, the mode can become leaky plus some from the optical power could be radiated. If the index from the external material could be changed with a controllable mean, with the effects for example thermo-optic, electro-optic, or acoustic-optic, a device with controllable attenuation is achievable.

What is Fiber Optic Attenuator

A fiber optic attenuator, also called an optical attenuator, simulates losing the could be caused by a long period of fiber. Typically, this device performs receiver testing. While an optical attenuator can simulate the optical loss of an extended period of fiber, it can’t accurately simulate the dispersion that would be caused by a long length of fiber.

Put it simply, for a fiber optic receiver, too much light can overload it and degrade the bit error ratio. In order to achieve the best bit error ratio (BER), the light power should be reduced. Fiber optic attenuators fit the requirement perfectly. This could happen when the transmitter delivers too much power for example once the transmitter is simply too near to the receiver.

Fiber optic attenuators are like your sunglasses, which absorbs the extra light energy and protect your eyes from being dazzled. Attenuators normally have a working wavelength range in which they absorb the sunshine energy equally.

An essential characteristic of a good fiber attenuator is that they should not reflect the light, instead, they should absorb the extra light without being damaged. Because the light power used in fiber optic communications are fairly low, they usually could be absorbed without noticeable damage to the attenuator itself.

Types of Optical Attenuators

Two types of fiber optic attenuators exist: fixed value attenuators and variable optical attenuators.

Fixed value attenuators have fixed values that are specified by decibels. Their applications include telecommunication networks, optical fiber test facility, Lan(LAN) and CATV systems. For instance, a -3dB attenuator should reduce concentration of the output by 3 dB(50%). Fixed value attenuator’s attenuation value can’t be varied. The attenuation is expressed in dB. The operating wavelength for optical attenuators ought to be specified for that rated attenuation, because optical attenuation of a material varies with wavelength. Fixed value attenuators are comprised of two big groups: In-line type and connector type. In-line type appears like an ordinary fiber patch cable; it has a fiber cable terminated with two connectors which you’ll specify types. Connector type attenuator looks like a bulk head fiber connector, it has a male end and a female end. It mates to regular connectors of the identical type for example FC, ST, SC and LC.

Variable optical attenuators come with a variety of designs. They’re general used for testing and measurement, but they also possess a wide usage in EDFAs for equalizing the sunshine power among different channels. One type of variable optical attenuator is made on the D-shaped fiber as a type of evanescent field device. If your bulk external material, whose refractive index is larger compared to mode effective index, replaces a part of the evanescent field reachable cladding, the mode can become leaky plus some from the optical power could be radiated. If the index from the external material could be changed with a controllable mean, with the effects for example thermo-optic, electro-optic, or acoustic-optic, a device with controllable attenuation is achievable.

Source: http://www.jfiberoptic.com

How does a fiber optic cable work?

A fiber-optic cable is composed of many very thin strands of coated glass or plastic fibers that transmit light through the process of “cladding,” in which total internal reflection of light is achieved by using material that has a lower refractive index. Once light enters the fiber, the cladding layer inside it prevents light loss as the beam of light zigzags inside the glass core. Glass fibers can transmit messages or images by directing beams of light inside itself over very short or very long distances up to 13,000 miles (20,917 kilometers) without significant distortion. The pattern of light waves forms a code that carries a message. At the receiving end, the light beams are converted back into electric current and decoded. Uses include telecommunications medical fiber-optic viewers, such as endoscopes and fiberscopes, to see internal organs; fiber-optic message devices in aircraft and space vehicles; and fiber-optic connections in automotive lighting systems.

Fiber-optic cables have greater “bandwidth”: they can carry much more data than metal cable. Because fiber optics is based on light beams, the transmissions are more impervious to electrical noise and can also be carried greater distances before fading. The cables are thinner than metal wires. Fiber-optic cable delivers data in digital code instead of an analog signal, the delivery method of metal cables; computers are structured for digital, so there is a natural symbiosis. The main disadvantage is cost: fiber optics are much more expensive than traditional metal cable.

To understand how a fiber optic cable works, imagine an immensely long drinking straw or flexible plastic pipe. For example, imagine a pipe that is several miles long. Now imagine that the inside surface of the pipe has been coated with a perfect mirror. Now imagine that you are looking into one end of the pipe. Several miles away at the other end, a friend turns on a flashlight and shines it into the pipe. Because the interior of the pipe is a perfect mirror, the flashlight’s light will reflect off the sides of the pipe (even though the pipe may curve and twist) and you will see it at the other end. If your friend were to turn the flashlight on and off in a morse code fashion, your friend could communicate with you through the pipe. That is the essence of a fiber optic cable.

Related fiber optic cables – fiber optic patch cord, also called fiber optic patch cable, is a fiber optic cable terminated with fiber optic connectors on both ends. It has two major application areas: computer work station to outlet and fiber optic patch panels or optical cross connect distribution center. Fiber optic patch cables are for indoor applications only.

What is the difference between a single mode and multi mode fiber optic connector?

There are 2 major differences one color code. single mode will be white or yellow. multimode will be black or tan. 2nd the hole in the connector ferrel for the fiber. fiber is 125 microns. in a single mode connector the opening is 126 microns. multimode is 127/128.
Single Mode cable is a single strand (most applications use 2 fibers) of glass fiber with a diameter of 8.3 to 10 microns that has one mode of transmission. Single Mode Fiber with a relatively narrow diameter, through which only one mode will propagate typically 1310 or 1550nm. Carries higher bandwidth than multimode fiber, but requires a light source with a narrow spectral width. Synonyms mono-mode optical fiber, single-mode fiber, single-mode optical waveguide, uni-mode fiber.
Single Modem fiber is used in many applications where data is sent at multi-frequency (WDM Wave-Division-Multiplexing) so only one cable is needed – (single-mode on one single fiber)
Single-mode fiber gives you a higher transmission rate and up to 50 times more distance than multimode, but it also costs more. Single-mode fiber has a much smaller core than multimode. The small core and single light-wave virtually eliminate any distortion that could result from overlapping light pulses, providing the least signal attenuation and the highest transmission speeds of any fiber cable type.

Single-mode optical fiber is an optical fiber in which only the lowest order bound mode can propagate at the wavelength of interest typically 1300 to 1320nm.
Multi-Mode cable has a little bit bigger diameter, with a common diameters in the 50-to-100 micron range for the light carry component (in the US the most common size is 62.5um). Most applications in which Multi-mode fiber is used, 2 fibers are used (WDM is not normally used on multi-mode fiber). POF is a newer plastic-based cable which promises performance similar to glass cable on very short runs, but at a lower cost.
Multimode fiber gives you high bandwidth at high speeds (10 to 100MBS – Gigabit to 275m to 2km) over medium distances. Light waves are dispersed into numerous paths, or modes, as they travel through the cable’s core typically 850 or 1300nm. Typical multimode fiber core diameters are 50, 62.5, and 100 micrometers. However, in long cable runs (greater than 3000 feet [914.4 meters), multiple paths of light can cause signal distortion at the receiving end, resulting in an unclear and incomplete data transmission so designers now call for single mode fiber in new applications using Gigabit and beyond.

Multimode& Singlemode fiber are the five types of fiber in common use. Both fibers are 125 microns in outside diameter – a micron is one one-millionth of a meter & 125 microns is 0.005 inches- a bit larger than the typical human hair. Multimode fiber has light travelling in the core in lots of rays, called modes. It’s a bigger core (always 62.5 microns, but sometimes 50 microns) & is used with LED sources at wavelengths of 850 & 1300 nm for slower local area networks (LANs) & lasers at 850 & 1310 nm for networks jogging at gigabits per second or more. Singlemode fiber has a much smaller core, only about 9 microns, so that the light travels in one ray. It is used for telephony & CATV with laser sources at 1300 & 1550 nm. Plastic Optical Fiber (POF) is large core (about 1mm) fiber that can only be used for short, low speed networks.
Step index multimode was the first fiber design but is slow for most makes use of, due to the dispersion caused by the different path lengths of the various modes. Step index fiber is rare – only POF makes use of a step index design today.
Graded index multimode fiber makes use of variations in the composition of the glass in the core to compensate for the different path lengths of the modes. It offers hundreds of times more bandwidth than step index fiber – up to about 2 gigahertz.
Singlemode fiber shrinks the core down so small that the light can only travel in one ray. This increases the bandwidth to infinity – but it is practically limited to about 100,000 gigahertz – that is still a lot!

Multimode& Singlemode fiber are the five types of fiber in common use. Both fibers are 125 microns in outside diameter – a micron is one one-millionth of a meter & 125 microns is 0.005 inches- a bit larger than the typical human hair. Multimode fiber has light travelling in the core in lots of rays, called modes. It’s a bigger core (always 62.5 microns, but sometimes 50 microns) & is used with LED sources at wavelengths of 850 & 1300 nm for slower local area networks (LANs) & lasers at 850 & 1310 nm for networks jogging at gigabits per second or more. Singlemode fiber has a much smaller core, only about 9 microns, so that the light travels in one ray. It is used for telephony & CATV with laser sources at 1300 & 1550 nm. Plastic Optical Fiber (POF) is large core (about 1mm) fiber that can only be used for short, low speed networks.
Step index multimode was the first fiber design but is slow for most makes use of, due to the dispersion caused by the different path lengths of the various modes. Step index fiber is rare – only POF makes use of a step index design today.
Graded index multimode fiber makes use of variations in the composition of the glass in the core to compensate for the different path lengths of the modes. It offers hundreds of times more bandwidth than step index fiber – up to about 2 gigahertz.
Singlemode fiber shrinks the core down so small that the light can only travel in one ray. This increases the bandwidth to infinity – but it is practically limited to about 100,000 gigahertz – that is still a lot!

Source: fiber cable manufacturer