IEC 60793-1-54:2018 Optical fibres Part 1-54: Gamma irradiation

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IEC 60793-1-54:2018 Optical fibres - Part 1-54: Measurement methods and test procedures - Gamma irradiation

IEC 60793-1-54:2018 outlines a method for measuring the steady state response of optical fibres and optical cables exposed to gamma radiation. It can be employed to determine the level of radiation-induced attenuation produced in Class B single-mode or Class A, category A1 and A2 multimode optical fibres, in either cabled or uncabled form, due to exposure to gamma radiation. The attenuation of cabled and uncabled optical fibres generally increases when exposed to gamma radiation.

This test is not a material test for the non-optical material components of a fibre optic cable. If degradation of cable materials exposed to irradiation is studied, other test methods will be used.  This test method is written to contain a clear, concise listing of instructions.

The background knowledge that is necessary to perform correct, relevant and expressive irradiation tests as well as to limit measurement uncertainty is presented separately in IEC TR 62283. This third edition cancels and replaces the second edition published in 2012.

This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:

- test conditions related to photobleaching have been changed;
- the test length has been modified to yield a total induced attenuation in the test sample at the end of the irradiation between 3 dB and 10 dB.

Keywords: optical fibres and optical cables exposed to gamma radiation