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Modulation frequency-shift technique for dispersion measurements in optical fibres using LEDs

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2 Author(s)
Thevenaz, L. ; University of Geneva, Group of Applied Physics, Geneva, Switzerland ; Pellaux, J.-P.

Reliable phase-shift measurements in optical fibres were performed by downshifting the modulation frequency of the optical signal to the low-frequency range before detection. This technique maintains the full resolution of the high-frequency modulation and increases the sensitivity allowing accurate group delay measurements in single-mode fibres over a 300 nm spectral range using a single LED.

Published in:

Electronics Letters  (Volume:23 ,  Issue: 20 )