BS EN 61755-3-32:2016

What is BS EN 61755-3-32- Connector optical interfaces about? 

BS EN 61755-3-32 is a safety standard on fibre optic interconnecting devices and passive components. 

BS EN 61755-3-32 defines certain dimensional limits of an angled PC rectangular thermoset (TS) ferrule optical interface to meet specific requirements for fibre-to-fibre interconnection. Ferrules made from the material specified in BS EN 61755-3-32 are suitable for use in categories C, U, E, and O as defined in IEC 61753-1. 

Ferrule interface dimensions and features are contained in the IEC 61754 series, which deals with fibre optic connector interfaces. 

Who is BS EN 61755-3-32- Connector optical interfaces for?  

BS EN 61755-3-32 on connector optical interfaces is relevant to: 

• Manufacturers of fibre optic interconnecting devices and passive components 
• Manufacturers of connector optical interfaces 
• Optical fibre technicians 
• Fibre optic workers 
• Testing authorities 
• Flooring industries 

Why should you use BS EN 61755-3-32- Connector optical interfaces? 

The performance of a single-mode angled PC rectangular ferrule optical interface is determined by the accuracy with which the optical datum targets of two mating ferrules are aligned with each other.  

There are three conditions affecting the alignment of the optical datum targets which are the following:  

• Lateral offset 
• Angular offset 
• Longitudinal offset 

Parameters influencing the lateral and angular offset of the optical fibre axes include the following: 

• Fibre hole deviation from a designated location 
• Fibre cladding diameter relative to fibre hole clearance 
• Fibre hole angular misalignment 
• Fibre core concentricity relative to the cladding diameter 
• Alignment pin diameter relative to the guide hole clearance 

Parameters influencing the longitudinal offset of the optical fibre axes include the following: 

• Fibre protrusion 
• Fibre array minus coplanarity 
• The adjacent fibre height differential 
• End face angle in the x-axis 
• End face angle in the y-axis 
• End face radius in the x-axis 
• End face radius in the y-axis 
• Fibre tip spherical radii 
• Axial force on the ferrule end face 
• Ferrule and fibre material constants 
• The frictional force of alignment pins in ferrule guide holes 

BS EN 61755-3-32 defines the dimensional limits of angled PC rectangular ferrules with a single row of up to 12 fibres. The fibre centres are spaced with a nominal alignment pitch of 0,25 mm. Interface variants, which identify nominal ferrule cross-sections and applicable fibre counts. 

Overall, BS EN 61755-3-32 is useful as it assists with the parameters that are systematically varied to determine the interrelationships with mating force.