Title :
Technique for minimising effect of detector inhomogeneity on fibre attenuation measurements
Author :
Sharma, A.B. ; Hubach, E.J.R. ; L¿¿hteenoja, M. ; Halme, S.J.
Author_Institution :
Helsinki University of Technology, Electrical Engineering Department, Communications Laboratory, Espoo, Finland
Abstract :
In fibre attenuation measurements by the `cut-back¿ method, the necessity for a homogeneous detector is implicit. We have found a commonly used germanium detector to be significantly inhomogeneous, leading to an estimated attenuation discrepancy of 0.02 dB at best and 0.4 dB at worst. In the letter, we outline a method for reducing this discrepancy to levels of less than 0.004 dB.
Keywords :
attenuation measurement; optical dispersion; optical fibres; optical variables measurement; photodetectors; Ge detector; attenuation discrepancy; cut-back method; detector inhomogeneity; fibre attenuation measurements; optical fibres;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19820039
