Fiber Optic Blog

Fiber optic splice closure is usually used with outdoor fiber optic cables, provides space for the outdoor fiber optic cables to be spliced together. The fiber optic splice closures and the fiber trays inside will protect the spliced fiber and the joint parts of the outdoor fiber cables. Generally the fiber optic splice closures are dome type and horizontal types, and Horizontal Fiber optic Splice Closure is used more often.

Structure Of Fiber Splice Closures

The fiber splice closures are made from special industrial grade, high tension plastic with a reliable moisture barrier. They are also optimized to resist aging of the material due to factors in the natural environment such as ultraviolet light.

There are two main types of closures, fiber optic and fiber optic terminal. A closure is hardware used to restore integrity of fiber cables entering the enclosure. The terminal is a hardened external connector that allows the addition of one or more fiber cables to the enclosure. These two categories can be configured as butt closures and in-line closures. The butt closure allows cables to enter from one end, while the in-line allows entry from both ends. Both the butt closures and in-line closures can be one of the following types:

Fiber Optic Splice Closures Key Features:

The box add aging-resistant in imported high tensile construction plastic out-faster is made up of stainless steel;

Overlap structure in splicing tray easy to install;

Suitable for ordinary fiber and ribbon fiber;

Perfect leak proofness and fine function;

Perfect and reliable sealing operations;

Fiber-bending radium guaranteed more than 40mm;

Full accessories for convenient operations;

Fiber optic splice closure can be used repeatedly;

High reliability;

For aerial, and direct buried applications.

Fiber Optic Splice Closure Types

For outside plant splice closure, there are two major types: horizontal type and vertical type.

1) Horizontal type

Horizontal type splice closures look like flat or cylindrical case. They provide space and protection for optical cable splicing and joint. They can be mounted aerial, buried, or for underground applications. Horizontal types are used more often than vertical type (dome type) closures.

Most horizontal fiber closure can accommodate hundreds of fiber connections. They are designed to be waterproof and dust proof. They can be used in temperature ranging from -40°C to 85°C and can accommodate up to 106 kpa pressure. The cases are usually made of high tensile construction plastic, are widely used in CATV, telecommunications and fiber optic networks.

2) Vertical Type

Vertical type of fiber optic splice closures looks like a dome, thus they are also called dome fiber optic splice closure. They meet the same specification as the horizontal types. They are designed for buried applications.

Vertical fiber optic splice closures are made of excellent engineering plastics, they are with 1inlet/outlet ports, 2inlet/outlet ports, 3inlet/outlet ports types, fitting different fiber optic core numbers. The vertical fiber optic splice closure is used in CATV, telecommunications and fiber optic networks.

Fiber splice closures accept both Ribbon Cable and round fiber cables. Each type (ribbon or round cable) fits respective requirement of different fiber splicing counts. They are widely used in optic telecommunication systems.fiber-mart.com offers fiber optic splice closure, vertical, horizontal, dome, from 2 cores to 240 cores maximum, with inside fiber optic splice trays accessories like fusion splice sleeves.

When comparing traditional copper cable with fiber optic cable, it is hard to be impartial, because the facts speak so clearly for themselves. Fiber optic cable is superior to copper cable in almost every way imaginable.

It is much faster than copper cable, carries much higher bandwidth, has less interference and is lighter, stronger and more durable as well. While copper has been a reliable medium in the past, fiber optic cable is undoubtedly the future and this article takes a closer look at each of it’s many advantages.

How it works

While traditional copper wire transmits data by electrical impulses, fiber optic cable is made from fine hair-like glass fibers, which carry light impulses transmitted by an LED or laser. This infrared light bounces along the insides of the fibers at blistering speeds and when the signal reaches the other end of the fibers, an optical receiver then converts it back into data.

Speed

Speed is the amount of data that you can transmit per unit of time and when it comes to speed, fiber optic cables win hands down over copper cables. While traditional copper lines can carry roughly 3,000 phone calls at one time, fiber optic cables used in a similar system could carry around 31,000 calls.

Bandwidth

The reason fiber optic cable is faster is because of the extremely high frequency ranges it is able to carry, whereas signal strength diminishes at high frequencies with copper wire. Fiber optic cable can carry more than a thousand times the bandwidth of copper cable and go more than one hundred times further as well.

Interference

Fiber optic cable is also much less susceptible to noise and electromagnetic interference than copper wire. For example, over a distance of two kilometres, copper wire would experience a great deal of degradation in quality, while there would be virtually none over the same distance using fiber optic cable.

Size, weight & strength

Fiber optic cable is much thinner and lighter than copper cable, meaning it can be used more efficiently in confined underground conduits. It is also much stronger, with eight times the pulling tension of copper wire and it has strength members and stiffeners that make it much harder to damage or kink.

Durability

Fiber optic cable is extremely durable and provides very reliable data transmission. It does not conduct electricity because it’s core is made of glass, it is impervious to radio frequency interference, it can be immersed in water without effect and it can be used in much harsher conditions, as it is less susceptible to fluctuations in temperature than copper cable.

Security

Fiber optic cable also keeps data more secure. It does not radiate signals and is impossible to tap without your knowledge, because the system will fail if is tapped, due to the fact that it will leak light. It is also more secure because all the hardware and electronics can be stored in one central location, unlike copper systems, where wiring closets are required to be placed in various locations.

Cost

Possibly the one area where copper cable has the advantage over fiber is the price. While fiber optic cable is not more expensive than copper cable, the electronics needed to support it are more expensive. This is only a short term advantage, however, as fiber optic cable actually comes out cheaper in the long term. This is when you take into account that fiber optic systems are getting cheaper all the time due to market forces, they require less hardware, need less ongoing maintenance and they experience much less down-time than copper systems.

Power transmission

As well as data transmission, fiber optic cable is also the preferred means of transmitting power. This is because it is non-conductive and low voltage, so it is much safer to install and maintain and less hazardous when used in urban environments. It also doesn’t attract lightning as copper cable can do and is much lighter and much more durable.

Future

While the difference between copper and fiber optic cables is already akin to the difference between the telegraph and the telephone, the future will see fiber optic technology improve exponentially.

Fiber optic systems are already being used in the backbone applications of most major companies because of their reliability and upgradability and in the near future, a technique known as wavelength multiplexing will increase their capacity even more, by allowing multiple channels to run on a single fiber strand.

The development of better quality glass will also allow signals to travel even further without experiencing degradation. All up, it is fairly safe to assume that, just as digital telephony has done in the past, so fiber optic technology will put yet another nail in the coffin of the traditional copper wire.

Many people who have a brief introduction of fiber patch panel, the device conducive to cable management may be from the Google or my blog, well, but when we really want to use the fiber optic patch panel, what preparations of the patch panel we should do, this article will give you the answer. As for some people say that my blog has too few pictures, and I try to show more.

fibre patch panel

First, ensure a length of spare cable (slack) is provided within the cabinet (5m recommend). As well as being required to facilitate the termination of the cable will allow for the possibility of Pre-terminated patch Panel, repair and ability to relocate the panel if required in the future.

The spare cable may require special stowage requirements in the installation. Before termination, always cut off the first meter of cable as this part can be damaged after pulling the cable, bending etc…The removal of this 1m section to the final amount of cable slack provided.

chassis

Slide the sliding drawer off the chassis (fixed part) – lift the drawer up to disassembled it from the chassis.

chassis part

Keep the drawer in an upwards position and pull it forwards.

step 2

When reaching the end of the chassis, lift the drawer more and unhook, now both parts are separated.

step 3

The L-shape brackets of the chassis can be installed forward or recessed. By default, it is installed in the forward position. Change it to the right position is dependant on the available space between the 19″ frame and tge cabinet door.

Then, position the chassis into the rack.

Remember to complete earthing requirements for metallic items using the screw and star washer provide a suitable earthing cable.

The hole for the screw is located at the rear of the panel on the left-hand side of the chassis

Thread the cable through the chassis of the Black Box Patch Panel. Make sure to respect the minimum bending radius while handling the cable.

Tips:

1. Sliding drawer preparation

For direct termination or pre-term installation: install the 4 support bases using the 4 small screws, washes from the screw kit provided and insert 4 loop rings on every support base, with the loop ring opening facing inwards. They will be used later to support the fibers.

2. For splicing

Install the first splice cassette on the drawer using the 2 longer screws and associated locking washers from the screw kit. The additional cassettes will be installed at a later stage. To connect the additional splice cassettes the hinges at the back of the splice cassettes will be used. Up to 4 splice cassettes can be installed according to the number of fibers to be terminated.

We NextGenFiber, multimodehave been working with our partners on exciting new technological advancements in support of optimizing high-speed transmission over multimode fiber (MMF). These advancements include a next generation MMF that we refer to as wide band multimode fiber (WBMMF). To understand the benefits of WBMMF, let’s start by reviewing today’s commonly used transmission technique for very high data rates over MMF.

As data rates have advanced above 28Gbps, a technique called multiplexing has been successfully standardized and deployed to deliver higher rates for applications such as 40GE and 100GE, with 400GE and 128GFC currently in standardization. All of these applications employ a type of multiplexing on MMF that involves dividing the data into lower speed constituents and conveying each over its own individual fiber within a multi-fiber cabling infrastructure, commonly referred to as parallel transmission.

Recent developments will add an additional multiplexing dimension enabling multiplication of MMF’s capacity through the use of multiple wavelengths. Through wavelength division multiplexing each additional wavelength expands the capacity of the fiber allowing either a reduction in the number of fibers or an increase in total channel capacity.

Existing OM3 and OM4 multimode fibers have a rather limited ability to support high speed transmission using wavelengths different than the 850nm wavelength for which they are optimized; however, a new generation of multimode fiber greatly expands that ability while retaining support for legacy 850nm applications. WBMMF can support four or more wavelengths to significantly improve capacity. For example, this new type of fiber could enable transmission of 100Gbps over a single pair of fibers rather than the four or 10 pairs used today.

fiber-mart.com is working diligently with leading ecosystem partners in the fiber, transceiver, server/switch and high performance computing industries to foster coordinated development of both new fiber technology and new transceiver technology. When combined, these two advancements will offer unprecedented capacity while maintaining the value that multimode transmission has always offered for short-reach communications channels.

When you install and terminate fiber optic cables, you always have to test them. A test should be conducted for each fiber optic cable plant for three main areas: continuity, loss, and power. And optical power meters are part of the toolbox essentials to do this. There are general-purpose power meters, semi-automated ones, as well as fiber optic power meters optimized for certain types of networks, such as FTTx or LAN/WAN architectures. It’s all a matter of choosing the right gear for the need.Optical power meters are commonly used to measure absolute light power in dBm. For dBm measurement of light transmission power, proper calibration is essential. A fiber optic power meter is also used with an optical light source for measuring loss or relative power level in dB. To calculate the power loss, optic power meter is first connected directly to an optical transmission device through a fiber optic pigtail, and the signal power is measured. Then the measurements are taken at the remote end of the fiber cable.

Fiber optic power meter detects the average power of a continuous beam of light in an optical fiber network, tests the signal power of laser or light emitting diode (LED) sources. Light dispersion can occur at many points in a network due to faults or misalignments; the power meter analyzes the high-powered beams of long-distance single-mode fibers and the low-power multibeams of short-distance multimode fibers.

Important specifications for fiber optic power meters include wavelength range, optical power range, power resolution, and power accuracy. Some devices are rack-mounted or hand held. Others are designed for use atop a bench or desktop. Power meters that interface to computers are also available.

The fiber optic power meter is a special light meter that measures how much light is coming out of the end of the fiber optic cable. The power meter needs to be able to measure the light at the proper wavelength and over the appropriate power range. Most power meters used in datacom networks are designed to work at 850nm and 1300nn. Power levels are modest, in the range of –15 to –35dBm for multimode links, 0 to –40dBm for single mode links. Power meters generally can be adapted to a variety of connector styles such as SC, ST, FC, SMA, LC, MU, etc.

Generally, multimode fiber is tested with LEDs at both 850nm and 1300nm and single mode fiber is tested with lasers at 1310nm and 1550nm. The test source will typically be a LED for multimode fiber unless the fiber is being used for Gigabit Ethernet or other high-speed networks that use laser sources. LEDs can be used to test single mode fibers less than 5000 meters long, while a laser should be used for long single mode fibers.

Most fiber optic power meters are calibrated in linear units such as milliwatts or microwatts. They may also provide measurements in decibels referenced to one milliwatt or microwatt of optical power. Typically, fiber optic power meters include a removable adaptor for connections to other devices. By measuring average time instead of peak power, power meters remain sensitive to the duty cycle of digital pulse input streams.

Use fiber optic power meter and other useful fiber optic test equipment to ensure that your fiber optic system will operate smoothly.

Fiber optic attenuator is used in the fiber optic communications to reduce the optical fiber power at a certain level, the most commonly used type is female to male plug type fiber optic attenuator, it has the optical fiber connector at one side and the other side is a female type fiber optic adapter, fiber optic attenuator name is based on the connector type and the attenuation level.

There are two functional types of fiber attenuators: plug style (including bulkhead) and in-line.

A plug style attenuator is employed as a male-female connector where attenuation occurs inside the device, that is, on the light path from one ferrule to another. These include FC fiber optic attenuator, LC attenuator, SC attenuator, ST attenuator and more.

An in-line attenuator is connected to a transmission fiber by splicing its two pigtails.

The principle of operation of attenuators are markedly different because they use various phenomena to decrease the power of the propagating light. The simplest means is to bend a fiber. Coil a patch cable several times around a pencil while measuring the attenuation with a power meter, then tape this coil. Then you got a primitive but working attenuator.

Most attenuators have fixed values that are specified in decibels (dB). They are called fiber optic fixed attenuator. For example, a -3dB attenuator should reduce intensity of the output by 3dB.

Manufacturers use various types of light-absorbing material to achieve well-controlled and stable attenuation. For example, a fiber doped with a transition metal that absorbs light in a predictable way and disperses absorbed energy as a heat.

Variable fiber optic attenuators also are available, but they usually are precision instruments used in making measurements.

fiber-mart.com offers many high quality Fiber Optic Attenuators, including FC,LC,ST Fiber Attenuators, both single mode and multimode.