Abstract
The authors investigate dispersion penalties in an analogue link using an uncooled Fabry-Perot laser operating near 1.3 µm. Mode-partition noise, caused by mode fluctuations combined with dispersion, can rise significantly as the laser temperature rises and, therefore, its wavelength drifts. It is found that in a link transmitting signals near 1 GHz the noise may rise by over 20 dB, even though the laser wavelength is close to the dispersion zero of the fibre.
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