What is BS EN 60793-1-30 - Optical fibres about?
BS EN 60793 is a series on optical fibres. Optical fibres are cylindrical dielectric waveguide (nonconducting waveguide) that transmits light along their axis through the process of total internal reflection. BS EN 60793-1-30 describes procedures for briefly applying a specified tensile load as a proof test to continuous lengths of optical fibre. The tensile load is applied for as short a time as possible, yet sufficiently long to ensure the glass experiences the proof stress, typically much less than one second. This method is applicable to types A1, A2, A3 and B optical fibres. The object of BS EN 60793-1-30 is to establish uniform requirements for the mechanical characteristic fibre proof test.
Who is BS EN 60793-1-30 - Optical fibres for?
BS EN 60793-1-30 on optical fibres is useful for:
- Telecommunication component manufacturers
- Telecommunication equipment manufacturers
- Design engineers
- Quality control personnel
Why should you use BS EN 60793-1-30 - Optical fibres?
The fibre consists of a core surrounded by a cladding layer, both of which are made of dielectric materials. BS EN 60793-1-30 defines several possible machine designs, all of which perform the basic functions required for measuring fibre proof with the indicated general operating requirements. Care should be used in the design so as to prevent coating damage. Two machine types are used which are braked capstan type and deadweight type. Either machine may be used during the fibre-drawing process (online for coated fibre only), or as a separate process step (off-line).
As defined in BS EN 60793-1-30 A specific apparatus illustrating these requirements is shown for braked capstan type test. The fibre is paid out with constant low tension. The rewinding after the proof test is also done with constant tension. The levels of the pay-off and take-up tensions are adjustable. The proof test load is applied to the fibre between the brake and drive capstans by creating a speed difference between the capstans. Two belts are used to prevent slippage at the capstans. One design can be that the high precision tension gauge measures the load on the fibre and controls the speed difference to achieve the required proof test load. The load level and operating speed of the equipment can be independently set.
In deadweight type sub-assembly pays out fibre from a reel under constant low tension. The pay-out subassembly has various guide rollers and pulleys, plus a motorised traversing mechanism. The pay-out dancer pulley keeps the sample under just enough tension to run straight and true to the proof test region, with minimum tension fluctuations. The pay-out capstan is the start of the proof test region. This capstan is driven and synchronized with the take-up capstan. Using BS EN 60793-1-30 you can describe procedures for briefly applying a specified tensile load as a proof test to continuous lengths of optical fibre.