Tag Archives: fiber cable

Detail Of Single Mode And Multi Mode Fiber Optic Cable

Fiber optic cable has become apparent that fiber-optics are steadily replacing copper wire as an appropriate means of communication signal transmission. They span the long distances between local phone systems as well as providing the backbone for many network systems. Other system users include cable television services, university campuses, office buildings, industrial plants, and electric utility companies.

There are three types of fiber optic cable commonly used:  single mode, multimode and plastic optical fiber (POF).  Although fibers can be made out of transparent plastic, glass, or a combination of the two, the fibers used in long-distance telecommunications applications are always glass, because of the lower optical attenuation.  Both multi-mode and single-mode fibers are used in communications, if you need to transmit less data over longer distances, use single mode fiber optic cables. For a greater data capacity over shorter distances, go with multi mode fiber optic cables, with multi-mode fiber used mostly for short distances (up to 500 m),Multi mode is often used for LANs and other small networks. And single-mode fiber used for longer distance links.

Single Mode Fiber: Single Path through the fiber

Single Mode cable is a single stand (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.  Single Mode is also referred to as single-mode fiber, single-mode optical waveguide, mono-mode optical fiber and uni-mode fiber. Single-mode fiber gives you a higher rate of transmission, it also can carry the signal up to 50 times farther distance than multimode, at a slightly higher cost.Single-mode fiber has a much smaller core than multimode.

Single Mode fiber is used to connect long distance switches, central offices and SLCs (subscriber loop carriers, small switches in pedestals in subdivisions or office parks or in the basement of a larger building). Practically every telco’s network is now fiber optics except the connection to the home.

Multi Mode Fiber: Multiple Paths through the fiber

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).Typical multimode fiber core diameters are 50, 62.5, and 100 micrometers.  Multi Mode fiber is used for shorter distances. Most applications in which Multi-mode fiber is used, 2 fibers are used. 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. Long cable runs (Above 3000 feet 914.4 meters in length), the multiple paths of light are believed to cause signal distortion at the receiving end, resulting in lost packets and incomplete data transmission. IPS recommends the use of single mode fiber in all applications using Gigabit and higher bandwidth.

12 cores Ribbon Indoor Flat Fiber Optic Cable

12 cores Ribbon Indoor Flat Fiber Optic Cable:

pdf.gif 12 cores Ribbon Indoor Flat Fiber Optic Cable Specification

Description:
Fiber count: 12
Optical fiber ribbon Color:
blue/orange/green/brown/grey/white/red/black/yellow/purple/pink/aqua
Aramid yarn
Outer jacket material
PVC/LSZH
Thickness: 0.5±0.1mm

Requirements:

Appearance Slickness, without bumps
Package Wooden drum
Length Not less than 1000M, nearly the same length per drum and other length
upon negotiation.
Test report Attached with OTDR test report,qualified certificate label the style of fiber.

 

Fiber property:

Fiber type Unit Single mode
fiber G652B
Multimode
fiber50/125
Multimode
fiber62.5/125
Multimode
OM3 300
Condition nm 1310/1550 850/1300 850/1300 850/1300
Attenuation dB/km 0.40/0.30 3.5/1.5 3.5/1.5 3.5/1.5
Dispersion 1550nm ps(nm·km) ≤18 —– —– —–
1625nm ps(nm·km) ≤22 —– —– —–
Bandwidth 850nm MHZ·.km —– ≥200 ≥160 ≥1500
1300nm MHZ.  ·km —– ≥200 ≥200 ≥500

Technical Specification:

Fiber Count Dimension Nominal weight Min.Bending Radius Max. Tension(N)
(mm) (kg/km) (mm) Short-term Long-term
Width Height Dynamic Static
4 3.1±0.3 2.5±0.3 10 60 30 150 80
6 3.2±0.3 2.5±0.3 11
5 3.6±0.3 2.5±0.3 13
12 4.2±0.3 2.5±0.3 15

What problems occurs when the transportation and installation of fiber optic cable

Fiber optic cable products is very fragile thing, need to be more specific protection, therefore, fiber optic cable in the transport, laying and installation process should note the following:

  • With the cable tray cable tray should be marked on the side surface direction scroll, scroll, from not too long, usually not more than 20 meters, rolling should be taken to avoid damage to barrier packaging board.
  • Cable should be used forklifts and other handling lifting equipment or special stage, non-optical disc directly from the car rolling or throwing.
  • Prohibited the cable tray with cable or flat stacked, the cable tray in the car need to be fortified wood.
  • Cable should not be set back several times, so the integrity of the internal structure of fiber optic cable, fiber optic cable laying should be carried out before the appearance of inspections and check specifications, quantity, length and attenuation test inspection and acceptance of a single plate, each plate with cable in nursing board with factory test certificate (should be properly kept for future reference), when the demolition of cable shield to guard against damage to the cable.
  • In the construction process should be noted that fiber optic cable bend radius not less than construction requirements, fiber optic cable does not allow excessive bending.
  • Laying overhead cables, through pulley traction, overhead cable to avoid buildings, trees and other facilities friction, avoid sharp mopping the floor or other hard objects with friction and damage to cable sheath, as necessary, installation of protective measures. After the pulley is strictly prohibited forced out of the traction cable, fiber optic cable has been crushed to prevent damage.
  • In the design of optical cable and then the building should be easy to find as much as possible to avoid, such as can not be avoided, cable fire protection measures should be taken.
  • In the relatively long section of cable laying construction, for back plate, cables must comply with Doon “8” dial up. It completely twisted cable status.
  • Fiber Optic Cable box selection must meet the standards of qualified YD/T814-1996 connector box to ensure fiber in the connector box of the radius of curvature of not less than 37.5MM, fiber remaining in the joint box length is not less than 1.6M, cable reinforcements firmly fixed in the connector box, cable and connector box does not occur between the twist, the joint box sealing performance, can prevent moisture from entering.
  • In the splice, the joint bi-directional OTDR attenuation should be based on the average test subject
  • Fiber optic cable laying completed, if not promptly follow treatment, fiber optic cable ends should be sealed to prevent moisture against the fiber.
  • In the splice, if not continue down several times, and then follow a recommended cut off (due to construction of the cable ends may be subject to mechanical damage).
  • Splice completed, should be set aside in the amount of cable connector box at both ends of the cable, and more than a solid plate in the cable rack.
  • Cable network project in one of the important role, not yet come in handy if there are problems before, resulting in economic losses can not be ignored, so the main points of the content of this article we want to focus, to avoid losses and waste.

What is the most important thing to be respected in fiber cable?

During each of the fiber optic cable installation project, we must bear in mind two very important things: First, it is never too bend the fiber cable above the minimum radius of curvature. Second, never pull the cord above the manufacturer-specific cable pulling tension.

Related fiber optic products: fiber optic patch cord, fiber optic pigtail

Related news:

Single Fiber Optic Cable Sets New World Record

The National Institute of Information and Communications in Tokyo has achieved a world speed record of sending 109 terabits per second over a single fiber optic cable. The optical fiber cable the team used contained a single fiber with seven “light-guiding cores,” whereas a regular fiber optic cable contains a single core. Each core managed to carry 15.6 terabits per second.

Tim Strong of TeleGeography Research says that the new record speed is far beyond the world’s current capacity, as the total capacity of one of the world’s busiest routes, between New York and Washington D.C., is only a few terabits per second, a speed dwarfed by the 109 terabits per second record. Strong does point out, however, that traffic has been growing 50 percent each year for the past few years.

The runner-up record-setter, Dayou Qian, achieved a speed of 101.7 terabits per second using a method that employed 370 separate lasers, each one carrying a small amount of information, but combining to form a large, single data transfer sent down 165 kilometers of fiber optics.

Though these speeds aren’t practically applied anywhere as of yet, it’s not a stretch to think huge data centers may be using these methods of data transfer soon, as we live in a world dominated by the Internet, and companies like Google and Amazon are gigantic and show no signs of slowing down anytime soon. 7DNG2S92MQHH

Source: fiber optic cable supplier

what is singlemode fiber cable

In fiber optics technology singlemode fiber is one of two types of fiber currently in use. It is a single strand of glass fiber for a single ray (or mode) of light transmission. Singlemode fiber is used for long distance transmission.

Compare with multimode fiber

Source: fiber optic patch cord

Related news:

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City of Mayville to get fiber optic lines after all

In early May, finance chair Kathy Sertich said it was bad timing to pay for the installation of fiber optic from the school district. Now, it seems there is no time like the present.

The Mayville Common Council approved Monday evening an agreement with the Mayville School District to run fiber optic cable to City Hall to allow the police department to have high-speed access to security cameras at the schools with no cost to the city.

“The school district of Mayville proposes to install six strands of fiber to the city of Mayville as part of the district’s infrastructure upgrade at the school district’s cost,” said Sue Wery, technology director for the district.

Only two of those strands will be used at this time to allow police to connect to the cameras. The other four will be built in for future expansion at City Hall. The city will also not have to pay for any equipment needed for monitoring. The installation is slated for July/August.

“I think this is a great thing and I am glad,” Sertich said. “Thank you, because at this point we could not do it with the deficit that we’re still covering.”

On May 8, the city held a meeting in which it was determined that a fiber optic tie-in was not financially feasible due to a strict nine-year plan to pull the city out of debt. It was estimated to cost $5,800.

On May 22, the district was put on lockdown during a weapons scare which highlighted some shortcomings in the security plan. On June 11, the Wisconsin Board of Commissioners of Public Lands approved a $225,000 loan to the district for the project.

Wery said that hopefully next year they can apply for another grant that would reimburse them for the cost of the tie in as well as getting more cameras in the future.

“We didn’t want to incur any additional charges for you to have to come back next year and do it,” said John Westphal, school board president.

Source: fiber optic connectors

Revisiting the issue of cabling installation in relation to natural disasters

Furthermore, the 2013 Hurricane Season began on June 1, and the National Oceanic and Atmospheric Association expects it to be a busy period. With climate change continuing in much of the world and many experts anticipating extreme storms becoming more common moving forward, there is a growing need to construct buildings to the highest standards for safety. Meeting building codes that help a structure withstand extreme weather can save lives, and fiber cables play a vital role in this process.

There are two key perspectives to keep in mind when it comes to cabling and network equipment architectures in areas often impacted by natural disasters – maintaining communication and allowing free movement.

Cabling architectures and communication availability
Ensuring communications remain available is vital during a disaster. If workers in the office lose the internet because of a tornado, the business disruption is a problem, but not nearly as much of an issue as it would be if communications go down completely. Installing cabling architectures that interconnect with telecom infrastructure is a key part of a construction process, and how these systems are deployed can impact communications availability during a disaster. Having alternative network options that can provide emergency communications can also help, ensuring that emergency services can be contacted in the event of a disaster event.

Installing cables to ensure free movement through a building
A poor cabling setup can lead to major problems when disasters strike. Loose wires can clump together, blocking doors, hallways and other areas, preventing people from getting out of a building to escape or into a structure to rescue any trapped individuals. Meeting high standards for safety, including regulations from OSHA and national fire codes can provide a solid foundation for safe and well-designed cable deployment. However, it is important to also consider the quality of the components that keep cables in place and how the wiring systems are laid out in the building to ensure they do not become obstructions during a disaster.

Cabling installation methods could mean the difference between life and death during a disaster. When a tornado or hurricane hits an area, employees must be able to get to safety, or get help, as quickly as possible. Cables that get in the way can be a detriment to this process, but a well-designed system will not only stay out of the way, it could help keep key communication channels available.

Source: fiber optic patch cord, fiber optic cable manufacturer

Fiber becoming more accessible in data center networks

Data center networks have traditionally been built on a combination of structured cabling architectures, backhaul infrastructure and some point-to-point and top-of-rack cabling setups to support specific needs. This combination of cables can be extremely complex and often handles an incredibly large quantity of data. As traditional copper Ethernet cables used in many of these cabling topologies begin to struggle with bandwidth requirements, the need for fiber optic cables is increasing in the data center. According to Data Center Knowledge, advances in the fiber optic cabling sector are creating an environment in which optical network components are becoming more accessible.

The timing of advances in fiber could be perfect, as the rise of 10 Gbps, 40 Gbps and 100 Gbps network speeds could make fiber critical in a wide range of data centers. Fiber is not necessarily going to replace structured cables, as copper is able to handle 10 Gbps speeds and will likely be able to support 40 Gbps when the Category 8 standard is released. However, fiber may soon be necessary in the various interconnection points and backhaul setups within data centers.

The news source explained that pushable fiber is proving integral to helping data center managers take better advantage of optical network resources.

Understanding the advantage of pushable fiber
The article explained that pushable fiber is changing the way that data center managers install and manager optical components in the network. The combination of advanced microducts and better polymers in optical cables has created a dynamic in which fiber can be installed much more easily. In the past, fiber deployment required space in a specialized duct that protected the cables from being bent or having pressure exerted on them. New microducts provide the necessary protection and can be run through traditional cabling ducts. Furthermore, increasingly flexible fiber optic cables capable of a higher bend resistance are making installation a less strenuous activity.

According to the news source, many data center leaders have had to deal with costly projects to adjust network capacity. Innovation in pushable fiber is making many of those costs unnecessary by making it easier to integrate fiber with other parts of the configuration.

Fiber optic cabling has long had a reputation for offering incredible performance gains, but with high costs and major installation challenges. As the technology of the cables themselves has matured, many of these deployment and expense issues are receding, making the cabling format a much more accessible option in the data center.