Why do I need to use fusion splice protection sleeves?

Before we begin to dive into that question let’s get a brief understanding on what a fusion splicer is. If you are in the fiber optic world you will definitely know what a fusion splicer is and most likely will have used one or will be using one. A fusion splicer is a machine that fuses or welds two different pieces of fiber optic glass cables together to become one with an electric current also known as an arc. Most fusion splicers have an attached shrink oven that the protection sleeve is placed into to complete the process. Some splicers do not have an attached shrink oven and an external separate shrink oven will be needed for the application. As mentioned, fiber optic cable is made of glass and glass, especially how thin optical fiber is, will be very brittle and can very easily break. When this fusion of glass is completed, this is where our friend, the fusion protection sleeve steps in.

You may be asking, what is a fusion splice protection sleeve? Well that is a great question! A fusion protection sleeve is used to protect the fusion splice where the two separate pieces of fiber optic cable have been joined into one. A protection sleeve is made up of three parts: An outer shrinkable tube made of heat shrink plastic, an inner tube or fiber tube where the fiber is placed, and a strength member, either made of stainless steel or ceramic, more on this later. The protection sleeve ensures a consistent and reliable means of protection of the fiber when heat is applied from the splicer oven or external oven. Have you ever broke an arm or bone or knew someone who has? When this happens a cast is applied to the broken area. The cast can be interpreted as the protection sleeve and the broken bone area is the fiber optic cable. The cast protects the broken bone as the protection sleeve protects the fused fiber cable.

Fusion protection sleeves can be broken down into basically two categories: single splice protection sleeves and ribbon splice protection sleeves and will most commonly be 40mm or 60mm in length and are normally made of a clear outer tube so you can view the fiber when inside the sleeve for regular inspection and/or maintenance to the cable inside. A single splice protection sleeve is just that, a sleeve that will accommodate a single piece of fused fiber. A ribbon splice sleeve can accommodate multiple fiber splices ranging from 2-12 fibers inside the sleeve. As mentioned above, protection sleeves will either have a stainless steel or ceramic strength member that runs the entire length on the side of the protection sleeve and there is a definitive reason there are two different types of strength members. Fiber optic cable uses light to transmit data and light and glass to not conduct electricity. If a contractor is specifically using fiber optic cable in the application there should be no worry in using a protection sleeve that contains a stainless steel strength member. On the other hand if the fiber optic application will be next to or near any copper/conductive type material, the contractor may consider a splice sleeve that contains the ceramic strength member so there is no electrical disturbance between the copper cable or conductive material and the strength member.

Before the splice sleeve is applied to the fusion splice and the cable, the splice sleeve itself should be inspected before installation. This is done to ensure the sleeve is free from deformity and is clean both on the outside and the inside of the sleeve. The inspection and cleaning process is vital in any fiber optic application ranging from cleaning connector ends to making sure your equipment is clean from any contaminants. Not cleaning your fiber optic accessories and equipment is the leading cause of attenuation in the cable. Attenuation is the measurable loss of signal strength along the cable and it is measured in decibels. Inspecting the inside of the sleeve to make sure it is free of contaminates along with cleaning the fiber before installing the sleeve is a good practice as the slightest bit of contaminates could and most likely will cause attenuation. When not using the sleeves, they should be stored in a clean plastic zip bag for protection during storage.

Aside from the importance of cleaning there are other factors to consider before your splice sleeve installation. As mentioned earlier, protection sleeves are used when fusion splicing. Your fusion splicer has many different settings that can be chosen when splicing and may differ from manufacturer to manufacturer. Fiber tension is one setting that may need to be adjusted in this process. Improper fiber tension can result in an improper or uneven shrink when the protection sleeve is placed in the shrink oven. It is essential to maintain proper tension on the cable and not to twist the fiber when placing in and removing from the oven.

Another factor to consider in this process is actually the type of cable you’re using to splice with. Some fiber optic cables contain a gel similar to petroleum jelly that is contained on the inside jacket of the fiber. This gel will need to be cleaned off of the cable with a special degreaser wipe to ensure the proper fit and finish of the application of the splice sleeve. Inspecting the splice sleeve after it is removed from the heating oven is another good practice as the heat setting may be to high resulting in a split in the sleeve itself or the heat may be to low resulting in an improper shrink to the sleeve. If either of these are observed you may need to adjust the heat setting on the oven itself.

Once all of these installation practices are meet, the protection sleeve along with the attached cable are usually placed in a splice tray. A splice tray is a tray or container that prevents spliced fibers from being damaged or misplaced after splicing. If the cable and protection sleeve will be placed in a splice tray the protection sleeve should have the strength member pointing down, you should not be able to see the strength member when looking at a protection sleeve when it is in a splice tray.

As small as the fusion protection sleeve may be, it is a huge importance to the fusion splicing world of fiber optics. When all of these practices are met, you will be successful when you decide to try your hand at fusion splicing with the added protection of fusion protection sleeves added to your fiber optic cable installation arsenal.

HOW TO USE & MAINTAINE THE FUSION SPLICING MORE EFFICIENTLY?

What is Fusion Splicer?
Fusion splicer may be the act of joining two optical fibers end-to-end using heat. The thing is to fuse both the fibers together in such a way that light passing with the fibers is not scattered or reflected back from the splice, and thus the splice as well as the region surrounding it are almost as strong because virgin fiber itself. The basic fusion splicer apparatus includes two fixtures which the fibers are mounted and two electrodes. Inspection microscope assists in the placement in the prepared fiber ends into a fusion-splicing apparatus.The fibers they fit in to the apparatus, aligned, and then fused together.

What is Fusion Splicer?

Fusion splicer may be the act of joining two optical fibers end-to-end using heat. The thing is to fuse both the fibers together in such a way that light passing with the fibers is not scattered or reflected back from the splice, and thus the splice as well as the region surrounding it are almost as strong because virgin fiber itself. The basic fusion splicer apparatus includes two fixtures which the fibers are mounted and two electrodes. Inspection microscope assists in the placement in the prepared fiber ends into a fusion-splicing apparatus.The fibers they fit in to the apparatus, aligned, and then fused together.

Initially, fusion splicing used nichrome wire as the heating unit to melt or fuse fibers together. New fusion-splicing techniques have replaced the nichrome wire with fractional co2 lasers, electric arcs, or gas flames to heat the fiber ends, causing them to fuse together. The little size of the fusion splice along with the development of automated fusion-splicing machines make electric arc fusion the most popular splicing approaches to commercial applications.

Fusion splicers are automatic machines that you need to either choose factory recommended settings or you set the splicing parameters yourself.  There are five basic steps to fusion splicing with a splicing machine.

1.Put on the fusion splice protection sleeve.

2.Strip the fiber. Strip back all fiber coatings down to the 125um bare fiber. Clean the bare fiber with 99% isopropyl alcohol.

3.Cleave the fiber. The fiber needs to be cleaved with a high precision cleaver. Most splicing machines come with a recommended cleaver. Fiber cleaving is a very important step as the quality of the splice will depend on the quality of the cleave.

4.Put the fibers into the fiber holders in the fusion splicer. Press the start button to start the fusion splicing

5.Heat shrink the protection sleeve to protect the splicing joint.

The most common parts of a fiber fusion splicer include Electrodes and V-Grooves. Fusion splicers are dependent upon high-quality electrodes to focus that critical arc of electricity. As the electrodes wear from use, electrodes gradually worn and lead to weaker splices and higher splice losses. Cleaning electrode is part of the essential maintenance of fusion splicer and will not restore the performance of the fusion splicer as electrodes need to be replaced.

Always replace fusion splicer electrodes as a pair. For optimal performance, electrodes should also be aligned when they are replaced. This is a tuning process to maximize the performance of your splicer.

Maintained Methods of Fusion Splicer Parts

1. Electrical welding electrode life is generally about 2000, after a long time the electrode will be oxidized, resulting in the discharge current is too large leaving the splice loss value increases. You can remove the electrodes, medical cotton wool dipped in alcohol to gently wipe and then install the fusion splicer, and discharge cleaned once. If repeated washing, the discharge current is still too large, it shall replace the electrode.

Replace the electrode first remove the protection of the electrode chamber cover, loosen the screws fixed on the electrode and remove the upper electrode. Then release the top wire fixed to the lower electrode, remove the lower electrode. Installation of new electrode opposite action of the demolition order, require two electrode tip clearance: 2.6 ± 0.2mm, with the optical fiber symmetry. Under normal circumstances electrode is not required to be adjusted. Not touch the tip of the electrode in the replacement process, prevent damage, and should avoid the electrodes to fall inside the machine. After replacing the electrode, carry out calibration of the arc position.

Fiber Optic Fusion Spare Electrodes

Care of the electrode used for a long time, the tip of the electrode will produce sediment discharge poor, then there will be a “hissing” sound, then need to clean the electrode. The recommended the regular welding machine electrodes care that clean the electrode.

2. 4 clean V-shaped groove welding machine tune the core direction of the upper and lower driving range each only tens of microns, slightly foreign body will make the fiber image deviation from the normal position, resulting in normal alignment. At this time the need for timely clean the V-groove:

A. Off the windshield of the welding machine.

B. Open the fiber optic pressure head and the clamping platen.

C.Stick with a cotton swab dipped in anhydrous alcohol (or sharpened toothpick) single wipe in a V-Groove Fiber Aligner.

Note: Avoid using hard objects to clean the V-groove or V-groove on the force, to avoid bad V-groove or V-groove inaccurate, resulting in the instrument can’t properly use.

Proper use of Fusion Splicer is to reduce an important guarantee of the optical fiber splice loss and key links. You always should be strictly in accordance with the instructions of the welding machine and operational procedures. And properly set the welding parameters according to the type of fiber (including pre-discharge current, time and the main discharge current, the main discharge time). Do as above, the working life of your fusion splicer certain can be longer.

Conclusion

Despite the advances in fiber and fusion splicing technology, there are still many aspects of splicing of which practitioners must remain aware. Differences in fibers, equipment, environment and technique can yield different splice loss results. It is important to learn how to use and maintain the fusion machine more efficiently.

Here are some guidelines for splicing contractors and technicians.

Follow the applicable equipment manufacturer’s guidelines for setup and maintenance of all splice equipment. All fusion splicer have maintenance requirements which should be described in the operating manual. Besides cleaning regularly, they require electrode alignment and occasional replacement. Follow manufacturer’s requirements for servicing.

Maintain clean equipment and a clean splice environment, being especially wary of windy and/or dusty conditions.

Use the fusion splicer’s estimated splice loss reading as an initial go/no-go evaulation of the splice.

Splice loss specifications should be set with the total link power budget in mind and be based on average splice loss.

For newest quotes of Fusion Splicers, For more info, please browse our website – www.Fiber-Mart.com or by sending an email to product@fiber-mart.com.

Some things you must know about Fusion Splicer

What is Fusion Splicer?

Fusion splicing is the act of joining two optical fibers end-to-end using heat. The goal is to fuse the two fibers together in such a way that light passing through the fibers is not scattered or reflected back by the splice, and so that the splice and the region surrounding it are almost as strong as the intact fiber.

What is Fusion Splicer?

Fusion splicing is the act of joining two optical fibers end-to-end using heat. The goal is to fuse the two fibers together in such a way that light passing through the fibers is not scattered or reflected back by the splice, and so that the splice and the region surrounding it are almost as strong as the intact fiber. The source of heat is usually an electric arc, but can also be a laser, or a gas flame, or a tungsten filament through which current is passed. and thus the splice as well as the region surrounding it are almost as strong because virgin fiber itself.

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The basic fusion splicer apparatus includes two fixtures which the fibers are mounted and two electrodes. Inspection microscope assists in the placement in the prepared fiber ends into a fusion-splicing apparatus. The fibers they fit in to the apparatus, aligned, and then fused together.

Initially, fusion splicing used nichrome wire as the heating unit to melt or fuse fibers together. New fusion-splicing techniques have replaced the nichrome wire with fractional co2 lasers, electric arcs, or gas flames to heat the fiber ends, causing them to fuse together. The little size of the fusion splice along with the development of automated fusion-splicing machines make electric arc fusion the most popular splicing approaches to commercial applications.

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Fusion Splicing vs Mechanical Splicing

There are two types of optic fiber splicing. One is fusion splicing we mentioned above, another is mechanical splicing. In mechanical splicing two fiber optic cables are held end to end inside a sleeve using some mechanical mechanism. In this type of technique fibers aren’t joined permanently rather just accurately hold together, so that light can easily pass through from one end to another, while in fusion splicing two fibers are fused or wielded together using an electric arc, fusion splicing is most widely used technique because it provides a reliable join with lower insertions loss and practically no back reflection. Fusion splicing is generally applied on single mode fibers but in some special cases it can also be used for multi mode fibers.

The process of fusion splicing

The process of fusion splicing normally involves heat to melt or fuse the ends of two optical fibers together. The splicing process begins by preparing each fiber end for fusion.

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1.Stripping the fiber

Stripping is the act of removing the protective polymer coating around optical fiber in preparation for fusion splicing. The splicing process begins by preparing both fiber ends for fusion, which requires that all protective coating is removed or stripped from the ends of each fiber.

2.Cleaning the fiber

The customary means to clean bare fibers is with alcohol and wipes. However, high purity isopropyl alcohol (IPA) is hygroscopic: it attracts moisture to itself. This is problematic as IPA is either procured in pre-saturated wiper format or in (host) containers ranging for USA quart to gallon to drums. From the host container the IPA is transferred to smaller more usable containers. The hydroscopic nature of IPA is such that the highest quality at 99.9% is also the most hygroscopic. This means that moisture absorption into both the host container as well as the actual user’s container begins with the time the original container is opened and continues as amounts are transferred and removed from both.

3.Cleaving the fiber

The fiber is then cleaved using the score-and-break method so that its end-face is perfectly flat and perpendicular to the axis of the fiber. The quality of each fiber end is inspected using a microscope. In fusion splicing, splice loss is a direct function of the angles and quality of the two fiber-end faces. The closer to 90 degrees the cleave angle is the lower optical loss the splice will yield. The quality of the cleave tool being used is critical.

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4.Splicing the fibers

Fiber spliced, still unprotected, Current fusion splicers are either core or cladding alignment. Using one of these methods the two cleaved fibers are automatically aligned by the fusion splicer[1] in the x,y,z plane, then are fused together. Prior to the removal of the spliced fiber from the fusion splicer, a proof-test is performed to ensure that the splice is strong enough to survive handling, packaging and extended use. The bare fiber area is protected either by recoating or with a splice protector. A splice protector is a heat shrinkable tube with a strength membrane and less loss.

5.Protecting the fiber

After the fibers have been successfully fused together, the bare fiber is protected either by re-applying a coating or by using a splice protector.

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A simplified optical splicing procedure includes:

Characteristics of placement of the splicing

A simplified optical splicing procedure includes:

Characteristics of placement of the splicing process.

Checking fiber optic splice closure content and supplementary kits.

Cable installation in oval outlet.

Cable preparation.

Organization of the fibers inside the tray.

Installing the heat-shrinkable sleeve and testing it.

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Conclusion

Fusion splicing provides permanent low-loss connections that are performed quickly and easily, which are definite advantages over competing technologies.When it comes to optical fiber fusion splicers, no other company in the world can match Fiber-MART for innovation, speed, and performance. The entire industry-leading range of splicers offers quick termination and new standards in heater shrink time. Fiber-Mart strives for even better standards each day. Like Sumitomo Type-81C Fusion Splicer, Innovation is key. It can revolutionized on-site connectivity, speed and brought lower project costs for the migration of the network. As the major leader in optical fiber and connectivity solutions, customers can expect reliability, flexibility and unbelievable performance. After all, network infrastructure expansion becomes easy when you use state-of-the-art fusion splicer solutions.Any question or need pls feel free to contact with us. E-mail: product@fiber-mart.com.

 

 

 

 

 

Singlemode fiber and multimode fiber different and selection method(2)

The application of fiber optics is being gradually extended from the trunk or the computer room to the desktop and residential users, which means that more and more users who do not understand the characteristics of the fiber have come into contact with the fiber optic system. Therefore, when designing fiber link systems and selecting products, full consideration should be given to the current and future application requirements of the system, use of compatible systems and products, the greatest possible ease of maintenance and management, and adaptation to the ever-changing field conditions and user installation requirements.

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1. Can a fiber optic connector be terminated directly on a 250 μm fiber?  

 

Loose sleeve fiber optic cable contains bare fiber with an outer diameter of 250 μm, which is very small and fragile. It is unable to fix the fiber and is not enough to support the weight of the fiber optic connector and is very insecure. The connector is terminated directly on the fiber optic cable. At a minimum, a 900 μm tight jacket is required to wrap around the 250 μm fiber to protect the fiber and support the connector.

2. Can the FC connector be connected directly to the SC connector?

Yes, this is just a different connection method for two different types of connectors.
If you need to connect them, you must select a mixed adapter and use the FC/SC adapter to connect the FC connector and the SC connector at both ends. This method requires that the connectors should all be flat ground. If you absolutely need to connect APC connectors, you must use a second method to prevent damage.

The second method is to use a hybrid jumper and two connection adapters. Hybrid patch cords use different types of fiber connectors at both ends. These connectors will connect to the place where you need to connect. In this way, you can use a universal adapter to connect the system in the patch panel, but bring the system budget to budget. The increase in the number of connector pairs.

3. The fixed connection of optical fibers includes mechanical optical fiber connection and thermal welding. What are the selection principles for mechanical optical fiber connection and thermal welding?

Mechanical fiber optic connection, commonly known as fiber optic cold connection, refers to an optical fiber connection method in which a single or multi-fiber optical fiber is permanently connected through a simple connection tool and a mechanical connection technology without the need of a thermal fusion bonding machine. In general, mechanical splices should be used in place of thermal fusion when splices are made at a small number of cores dispersed at multiple locations.

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Mechanical fiber optic connection technology is often used in engineering practices such as line repairs and small-scale applications in special occasions. In recent years, with the large-scale deployment of fiber-to-the-desktop and fiber-to-the-home (FTTH), it has been recognized that mechanical fiber optic connection is an important means of fiber optic connection.

For fiber-to-the-desktop and fiber-to-the-home applications with a large number of users and geographically dispersed features, when the scale of the users reaches a certain level, the construction complexity and construction personnel and fusion splicer cannot meet the time requirements for users to open services. Because of the simple operation, short training cycle, and low equipment investment, the mechanical fiber connection method provides the most cost-effective solution for optical fiber connection for large-scale deployment of optical fibers. For example, in the high corridors, narrow spaces, insufficient lighting, inconvenient on-site power and other occasions, mechanical fiber optic connection provides a convenient, practical, fast and high-performance optical fiber continuation means for design, construction and maintenance personnel.

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 4. What is the difference between fiber optic splice enclosure requirements and fiber optic splice closures used in telecom operators’ outdoor lines in fiber-to-the-home systems?

First of all, in the fiber-to-the-home system, it is necessary to reserve the position of the optical splitter installation and termination, accommodation, and protection of the jumper to and from the optical splitter in the joint box according to actual needs. Because the actual situation is that the optical splitter may be located in the cable joint box, optical cable transfer box, wiring box, ODF and other facilities, and in which the optical cable termination and distribution.

Secondly, for residential quarters, the optical fiber cable splice box is installed in a buried manner. Therefore, the optical cable splice box has higher requirements for buried performance.

In addition, in the fiber-to-the-home project, it may be necessary to consider the entry and exit of a large number of small-core optical cables.