Experimental Validation of a Reflective Semiconductor Optical Amplifier Model Used as a Modulator in Radio Over Fiber Systems

Efficient modulation cancellation usingreflective SOAs

“…The employed RSOA is a 800 µm long device with a far-facet reflectivity of 10% driven at a constant bias current of 190 mA [8]. The experimental setup and simulation framework are shown in Figs.…”

“…The spatially resolved simulations modeled both counter-propagating waves within the RSOA, and regarded dynamic carrier injection [8,9]. The modeling framework for the RSOA is similar to that of single-pass SOAs with the appropriate boundary conditions applied at the reflective facet.…”

“…The equations for the propagation of the counter-propagating fields are given by: (4) by employing the techniques outlined in [8,9] and applying the RSOA boundary conditions. The RSOA input, The RSOA shows extremely large, > 30 dB, unsaturated fiber-coupled gain which reduces by 3 dB from peak gain occurring at input powers as small as 27 dBm.…”

“…Simulations show that in the self-inversion regime, the carrier distribution in the RSOA is heavily depleted at the input and at the reflective facet due to the carrier depletion from the forward and backward traveling waves. The gain depends exponentially [8,9] on the carrier concentration, thus moderate carrier depletion is sufficient to cause a strong reduction in the output power with increasing input power. Figure 5 shows the measured output ER (neglecting the spikes) for different input powers at 1.25 Gbit/s and 2.5 Gbit/s.…”

Next Generation of Optical Access Network Based on Reflective-SOA

“…A time domain model for reflective semiconductor optical amplifiers (RSOAs) was developed based on the carrier rate and wave propagation equations. The non linear gain saturation and the amplified spontaneous emission have been considered and implemented together in a current injected RSOA model (Liu et al, 2011). This approach follows the same analytical formalism as Connelly's static model (Connelly, 2007).…”