BS EN IEC 60793-1-32:2018

What is BS EN IEC 60793‑1‑45 - Optical fibres about?  

BS EN IEC 60793 is a series on optical fibres. Optical fibres are flexible, transparent fibres made by drawing glass or plastic to a diameter slightly thicker than that of human hair. BS EN IEC 60793‑1‑45 establishes uniform requirements for measuring the mode field diameter (MFD) of single-mode optical fibre, thereby assisting in the inspection of fibres and cables for commercial purposes.  

Who is BS EN IEC 60793‑1‑45 - Optical fibres for? 

BS EN IEC 60793‑1‑45 on optical fibres is useful for: 

• Telecommunication equipment manufacturers 
• Telecommunication component manufacturers 
• Design engineers 
• Quality control personnel 

Why should you use BS EN IEC 60793‑1‑45 - Optical fibres?  

Optical fibres are used most often as a means to transmit light between the two ends of the fibre and find wide usage in fibre optic communications, where they permit transmission over longer distances and at higher bandwidths (data transfer rates) than electrical cables. BS EN IEC 60793‑1‑45 discusses the mode field diameter measurement that represents a measure of the transverse extent of the electromagnetic field intensity of the guided mode in a fibre cross-section, and it is defined from the far-field intensity distribution as a ratio of integrals known as the Petermann II definition. 

The definitions of mode field diameter are strictly related to the measurement configurations. The mathematical equivalence of these definitions results from transform relationships between measurement results obtained by different implementations summarized in BS EN IEC 60793‑1‑45. Four methods are described for measuring mode field diameter those are method A, a direct far-field scan, method B, a variable aperture in the far-field, method C, a near-field scan and method D, a bi-directional backscatter using an optical time-domain reflectometer (OTDR). All four methods apply to all categories of type B single-mode fibre and operate near 1 310 nm or 1 550 nm. Method D is not recommended for the measurement of fibres of unknown type or design. Using BS EN IEC 60793‑1‑45 you can establish uniform requirements for measuring the mode field diameter of single-mode optical fibre. 

What’s changed since the last update?  

BS EN IEC 60793‑1‑45:2018 supersedes BS EN 60793‑1‑45:2003. BS EN IEC 60793‑1‑45:2018 includes some technical changes with respect to BS EN 60793‑1‑45:2003. These include: 

• Improvement of the description of measurement details for B6 fibre 
• Correction of Equations (1), (2), (5) and (6) 
• Correction of Table E.1, Table E.2 and Table E.3