PD IEC/TR 62469:2007

What is PD IEC/TR 62469- Residual stress measurement of optical fibre about? 

The measurement of residual stress distribution in an uncoated glass optical fibre is important as it affects critical fibre parameters such as refractive index, intrinsic polarization mode dispersion, mode field diameter and dispersion.   

PD IEC/TR 62469 is a technical report that describes a transverse polarimetric method to measure the residual stress profile of any type of optical fibre. The optical polarimetric method is a well-established technique to measure the residual stress of an optical material.  

PD IEC/TR 62469 describes the principle and detailed procedure for measuring the optical transverse stress profile of a fibre, which is cylindrically symmetric.  

PD IEC/TR 62469 is based on a polariscope, which is constructed with a fixed polarizer, a quarter-wave plate, and an analyzer. An optical tomographic technique is also described for measuring the stress profile of a fibre with a cylindrically non-symmetric structure. 

Who is PD IEC/TR 62469- Residual stress measurement of optical fibre for?  

PD IEC/TR 62469 on residual stress measurement of optical fibre is relevant to: 

• Manufacturers of optical fibre 
• Optical fibre technicians 
• Optical fibre installers 
• Testing authorities of residual stress 
• Ray-tracing techniques personnel 

Why should you use PD IEC/TR 62469- Residual stress measurement of optical fibre? 

Residual stress in an optical fibre is induced by the combination of fibre construction and the drawing processes. The stress information is important because it affects many important parameters of an optical fibre.  

PD IEC/TR 62469 describes the methods for measuring the residual stress of optical fibre, which help the users in so many ways such as: 

• Temperature-dependent changes of fibre parameters are larger for a fibre with the largest residual stress, and these handle the statistical behaviour of polarization mode dispersion (PMD) changes in deployed fibre links 
• The variation of important fibre parameters such as chromatic dispersion, mode field diameter, PMD depends on the intrinsic residual stress of an optical fibre 
• The asymmetric residual stress profile of fibre causes fibre curl, which affects cleaving quality for an optical fibre ribbon 
• The asymmetric residual stress of fibre is a major cause of the intrinsic PMD of an optical fibre 
• Excessive residual stress can lead to core cracking that might be seen in, for example, the preparation of the ends for connectors 
• The design of polarization keeping fibres normally involves inducing a non-symmetric stress field. This measurement can be used to confirm these designs. 

PD IEC/TR 62469 describes methods by measuring the polarization rotation of a transversely exposed laser light across a fibre cross-section using a polarimetric method. 

PD IEC/TR 62469 shows a typically calculated stress profile for a jacketed depressed inner cladding fibre. PD IEC/TR 62469 shows large stress peaks for the boundary between the substrate and the jacketing tube as well as the boundary between the core and inner cladding. 

Overall, PD IEC/TR 62469 is useful as it supplies guidance for residual stress measurement of optical fibre, which can be helpful for your business.