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Fiber Optics Mechanical Splicing

5/31/2015

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What is fiber optics splicing ?
Fiber Optics splicing is the process of jointing or holding two fibers together

There are two methods of fiber optics splicing namely :-
a. Fiber Optics Mechanical Splicing
Picture
b. Fiber Optics Fusion Splicing
Picture
What Is Fiber Optics Mechanical Splicing?
In a mechanical splicing, two cleaved fiber tips are mechanically aligned to each other by using a precise housing alignment. An index matching gel is preinstalled between both end cleaved fiber tips to minimize back reflection and to maintain a low-loss optical interface.

It is similar function to the fusion splicing except that the fibers are held together by mechanical means rather than by permanent fusion or welding technique. 

The mechanical splice performance depends on 
a. cleaving performance
b. mechanical splice housing alignment design
c. end-user skills and patience
The Fiber Optics Mechanical Splicing  Concept 
Basically the mechanical splice process involves five steps:-
a. fiber optics stripping
b. fiber optics cleaning to remove excess of plastic buffer
c. cleaving the fiber optics ends
d. inserting the fibers into the mechanical splice housing.
This mechanical splice housing retains the fibers so their ends are in contact.
Advantages of Mechanical Fiber Optics Splices
  1. Mechanical splices require no special tools except for fiber optics stripper and cleaver.
  2. Mechanical splices can be used in situations where power supply is not readily available or the using of fusion splicing is highly impractical.
  3. Mechanical splices can be made as a temporary connections. 
  4. Mechanically aligned cleaved fibers  can be completed in few minutes thanks to precision alignment mechanism.
  5. It is a low investment especially for FTTH's drop cable installation.

Disadvantages of Mechanical Fiber Optics Splices                                  
  1. The typical insertion loss of mechanical splicing is < 0.3 - 0.5dB compared to 0.03dB using fusion splicing.
  2. Mechanical splices are typically for multimode fibers due to its larger core diameter size however single mode mechanical splices is gaining momentum in the installaton FTTH last mile.
  3. The optical performance depending on quality of cleaving, alignment mechanism and index matching gel 
  4. Above all,  the completion of good mechanical splices depending upon end-user skills and patience.
Types of Mechanical Splices
Samples of Mechanical Splices
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Index of Refraction

5/17/2015

0 Comments

 
The basic optical property of a material is the index of refraction. 
It is also one of the key parameter that needs to be key-in into OTDR as to get accurate result on actual fiber optics distance measurement.
The index of refraction (n) measures the speed of light in an optical medium. 
Picture
The speed of light (c) in free space or vacumm is 
Picture
Therefore index of refraction of a material is equivalent to :-
Picture
When light enters  a different material ( from glass into air or from air into glass)is   the speed changes. 
This causes the light to bend or refract.
Light will always travel slower in the fiber material than in air. 


Picture
The index of refraction for glass  is approximately  1.50 or lower.
The index of refraction for air  is exactly 1.00. 

In order to get the actual fiber optics length measurement using OTDR, one  is required to enter fiber optics index of refraction into one of OTDR key parameters. The fiber optics index of refraction could be obtained from the fiber optics cable manufacturer.

0 Comments

    Author

    I have been in the field of fiber optics since early 1990s.  I gained fiber optics skills and knowledge via my working experience as end-user, main contractor and sub-contractor and finally as an optical fiber enterpreneur.
     

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  • HOME
  • Our Services
    • Hands-ON Training >
      • 1-Hari OTDR Fiber Optik Praktikal (Melayu)
      • Ujian Kecekapan Fiber Optik
      • 1-Hari Pengujian & Pentauliahan
      • 2-Hari Fiber Optik Praktikal (Melayu)
      • 4-Hari Fiber Optik Praktikal (Melayu)
      • 7-Hari Pemasangan Fiber Optik (Melayu)
    • Sijil Kecekapan
    • Accessories >
      • Patchcords
      • Pigtails
      • ProtectionSleeves
    • Test Gears & Tool Kits >
      • Cleaning Tool Kit
      • Splicing Machine
      • OTDR
      • Power Meter & Light Source
    • Fiber Optics Case Studies
    • Perunding Bebas
  • Contact Us
  • Why Us
    • Trainer's Profile
    • Our Esteemed Clients
    • Hands-ON Training Photos
    • Why Attend Our Fiber Optics Training?
  • My Blogs
    • Fiber Optics Blog
    • Biz Blog (In Malay)