標準號：IEC 60793-1-40-2001
中文標準名稱：光纖 第1-40部分：測量方法和試驗規程 衰減
英文標準名稱：Optical fibres - Part 1-40: Measurement methods and test procedures; Attenuation
標準類型：M33
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：M33
國際標準分類號：33.180.10
適用范圍：This part of IEC 60793 establishes uniform requirements for measuring the attenuation of optical fibre, thereby assisting in the inspection of fibres and cables for commercial purposes. Four methods are described for measuring attenuation, one of which being that for modelling spectral attenuation: - method A: cut-back; - method B: insertion loss; - method C: backscattering; - method D: modelling spectral attenuation. Methods A to C apply to the measurement of attenuation for all categories of the following fibres: - class A multimode fibres; - class B single-mode fibres. Method C, backscattering, also covers the location, losses and characterization of point discontinuities. To date, method D has been demonstrated only on class B fibres. Information common to all three measurements, and to the modelling method, appears in clauses 1 to 8, and information pertaining to each individual method appears in annexes A, B, C, and D, respectively.