Fusion Splicers

Types of fibre splicers - which to choose? 
Before purchasing a fusion splicer/welder, the customer should necessarily determine the tasks to be performed. This refers, among others, to the average number of splicing operations on a monthly or annual basis, the number of splices done during one installation, and finally the kind of the networks (building, metropolitan, internal LANs, CCTV systems etc.).
Depending on the answers to the above questions, the customer can choose a more or less advanced model of a fusion splicer. One of the most important processes carried out by the splicer is the positioning of the fibres before the welding process. According to this criterion, splicers can be divided into three groups:
  • Splicers based on cladding alignment - this is the most economical option; the splicer adjusts the mutual positions of their cladding (the standard diameter is 125 μm) to minimize the difference. Theoretically, such a method of positioning results in a weld having a slightly larger attenuation compared to other solutions, especially in the case of fibres of poor quality, where the core is not placed centrally with respect to the cladding. In practice, however, the fibres sold today are of high quality and in most cases the parameters of the splices performed with this method do not differ from results achieved with the use of other methods.
  • Splicers with aligning geometric core positions - this method is used by the majority of splicers and many manufacturers and retailers wrongly describe them as devices with aligning (actual) core positions; the core geometry is obtained by optical means (visible light). The intensity of light in the fibre decreases as a function of depth, and with a given sensitivity and simple image analysis, it is possible to determine the approximate positions of fibre cores. This method has been optimized for good quality fibres, where the geometric position of the core is equivalent to its real position. When the core is embedded eccentrically, the parameters of the splice can be worse than in the case of fibre cladding alignment.
  • Splicers with alignment of (real) core positions - it is the most professional and at the same time the most expensive solution. The devices using this method can automatically recognize the type of welded fibres and arrange them according to their real cores. Such welds are characterized by the best performance parameters. The welding machines utilizing this method are several times more expensive than devices based on the previous solutions.
Fusion Splicer: Signal Fire AI-8 (with toolbox and tools)
Signal Fire AI-8 fusion splicer offers two methods of fibre alignment, cladding alignment and aligning geometric core positions. It can be successfully used in all types of fibre optic installations. Due to current technological advances and the limited number of global fibre manufacturers, the difference between the results provided by splicers with geometric and real core alignment can be neglected. Situations in which the fibre have a significant deviation of core positions are extremely rare, and if they occur, it usually does not have a significant impact on the quality of the connections made.



ALK-88 Fusion Splicer

The Professionals Choice.

Brief Introduction.

  • Small in size.
  • Light in weight.
  • 7 seconds fast splicing, 14 seconds arc heating.
  • 200 to 260 times splicing and heating per battery charge.
  • 100% automatic fibre detection and splicing start.
  • Average splicing loss 0.02dB(SM) 0.01dB(MM) 0.04dB(DS) 0.04dB(NZDS).
  • PAS fibre core alignment technology.
  • CMOS image sensor imaging technology.
  • Carrying bag also your work platform.


  • Standard Package.
  • Optical fibre fusion splicer.
  • Power Adapter.
  • AC power Lin
  • Electrodes.
  • Cooler Clip.                                                  
  • Stripper.
  • Miller Pincers.
  • Blowing Dust Ball with Brush .
  • Specification.                                              
  • Fibre Clamp.
  • Fibre Cleaver.                                       
  • Carrying Bag. 

Configuration Check-list Table.               

Warranty and After-sale Service

Lifetime Warranty (Excluding contrived damageable or misuse). 

Any product will be tested in 100% before delivery. 


Signal Fire AI-8 Fusion Splicer

The latest Core Alignment Fusion Splicer from Signal Fire the AI-8. £1542.00 + vat




Core alignment technology with auto focus and six motors, it is a new generation of fibre fusion splicer. It is fully qualified with 100 km trunk construction, FTTH project, security monitoring and other fibre cable splicing projects. The machine uses industrial quad-core CPU, fast response, is currently one of the fastest fibre splicing machine in the market; with 5-inch 800 x 480 high-resolution screen, the operation is simple and intuitively; and up to 300 times focus magnifications,making it very easy to observe the fibre with naked eyes. 6 seconds speed core alignment splicing, 15 seconds heating, the working efficiency increased by 50% compared to ordinary splicing machines.

The fusion splicer comes with all the tools to carry out a splice joint. The Toolbox comes with a stool to facilitate the construction workers acting as a work bench.

High-capacity lithium battery, continuous splicing and heating about 200 times.


Name Signal Fire AI-7
Code L5880
Fiber alignment
Splicing cycle
8 s
Sleeve heating cycle
15 s (40 mm)
Number of motors
Auto-focus Yes
Fiber type compatibility
SM (G.652, G.657), MM (G.651), DS, NZDS (G.655)
Splice loss (typical)
0.025 dB (SM), 0.01 dB (MM), 
0.04 dB (DS/NZDS)
Return loss
min 60 dB
Calibration of the electric arc automated real-time, manual
Durability of electrodes
ca. 3000 splices (the kit includes spare electrodes)
Fiber diameter range
buffer: 80-150 μm
jacket: 100-1000 μm
Fiber cutting length
8 - 16 mm (250 μm overlap): 
  16 mm (>250 μm overlap)
Strength test
Yes (2 N)
Magnification x300 (in X or Y axis; x150 in both axes simultaneously)
Display 5.1" color TFT, 800x480 pixels
Power 7800 mAh lithium rech. battery, charging time 3.5 h
100-240 VAC charger with 13.5 VDC / 4 A output
Operating temperature range -15°C...+50°C
Operating humidity range (RH)
< 95% (no condensation)
Weight 2.08 kg (splicer with battery)
7.1 kg (whole kit)
Dimensions splicer: 130 x 122 x 148 mm
toolbox: 270 x 237 x 293 mm
Remarks built-in LED lamp 
configuration and diagnostic app
protection sleeves up to 60 mm

Splice Protectors

Buy 4 and get 1 free
Splice protectors are designed to maintain the strength & environmental stability of optical fibre cables after fusion splicing.
  • Heat shrinkable outer tube, hot melt fusion tube and stainless steel strength rod
  • Maintains optical properties of fibre
  • Provides strength and protection to optical fibre splices
  • Easy to use and install without damaging splice
  • Clear sleeve to allow visual location of splice prior to shrinking
  • Sealant protects splice 
  • 23mm, 45mm & 60mm clear sleeve. Pack of 100
  •  The colour set includes the colours designated in IEC 60304; Blue, orange, green,
    brown, Grey, White, Red, Black, Yellow, Violet, Rose and Aqua. 12 individual splices in a single bag.

Clear Tube Silicon

Pink Tube Silicon