Abstract EN:

The work carried out during this PhD deals with 2R optical regeneration in an optical transmission system. After the main sources of system degradation are shown, we introduce the principle of optical regeneration. We then show that a regenerator must be characterised in a link to prove its efficiency. A 3R optical regenerator cascade is considered in order to know the bit error rate (BER) evolution when amplitude noise limits the transmission. The efficiency of a 2R regenerator, composed of a saturable absorber and a semiconductor optical amplifier, is then demonstrated in a recirculating loop experiment at 10 Gbit/s. We obtain a distance improvement ratio of 9. 5 at a BER of 10-8. This device is moreover efficient over a spectral band of 13 nm showing its potential for WDM applications. More generally, a study of regenerator spacing, carried out in a two path recirculating loop, reveals an optimum spacing corresponding to the best compromise between timing jitter and amplitude noise.