6 August 1998 Maximum intensity noise induced by multiple-path interference from fiber-connector reflections
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Abstract
A concept of Post-fiber-transmission Intensity Noise or Interference Intensity Noise (IIN) is proposed and a formula estimate of maximum Relative Intensity Noise (RIN) for a CATV system induced by laser phase noise and multiple-path- interference (MPI) from fibre-connector reflections has been given out through theoretical analysis and experiment measurement. It is turned out that maximum RIN increases with total number of unqualified connectors and their light reflection coefficients, but decreases with RF frequency increase. For a fixed-length fibre jumper ended with two unqualified connectors, there exists a worst RIN dependent on laser linewidth and RF frequency, also exists another worst RIN dependent on RF frequency and fibre length for a given laser linewidth. It is concluded, only from the point view of depressing RIN induced by connector reflections, that lasers having linewidth within 30-300 MHz had better not be used. Furthermore if no connectors with slant connective end-surface can be got at hand, very limited total number, less than about 4 for example, of fibre connectors with flat connective end-surface can be unquestionably used.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Zhige Chen, Zeming Jiang, Zhaoming Huang, Hui Song, Xiaolei Jiang, "Maximum intensity noise induced by multiple-path interference from fiber-connector reflections", Proc. SPIE 3552, Fiber Optic Components and Optical Communication II, (6 August 1998); doi: 10.1117/12.318016; https://doi.org/10.1117/12.318016
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