Combined Self-Seeding and Carrier Remodulation Method for Reflective Transmitters in WDM-PON

Double‐RSOA colorless WDM‐PON for 5G fronthaul applications

“…In this framework, we proposed a combined WDM-PON topology employing both self-seeding at the OLT and carrier-reuse at the ONT. 18,19 Thus, the self-seeding cavity is limited to a few centimeters inside the CO, and a single wavelength can be used for data flow in both directions. More recently, we have also improved these techniques by using a second RSOA operating in a continuous wave (CW) regime to reinforce the optical erasure and increase the gain at the transmitters.…”

“…The self-seeding carrier generation process has already been extensively addressed by several authors, including ourselves, encompassing both experimental [18][19][20][21] and system performance aspects. [22][23][24] In particular, the principle of operation of the self-seeding transmitter depicted in Figure 2 is described in detail in our recent work.…”

“…For this purpose, all optical components and devices were configured with the same characteristics from our experimental data. [18][19][20][21] Then, we adjust the simulation values from the nominal parameter values, always within the allowed parameter variations specified in the manufacture data sheets, to match the experimental curves. Specifically, we addressed two main aspects: output characteristics of the RSOAs (gain curves and spectral profiles) and experimental BER measurements, as a function of several system parameters, such as NRZ extinction ratio and RSOA injection power.…”

“…Over the last few years, our group has proposed and investigated a WDM-PON topology combining self-seeding and carrier reuse to provide an entirely colorless network where a single wavelength per channel is used for data flow in both directions. [18][19][20][21] We have recently further improved this topology by employing a second RSOA to reinforce the erasure at both ends. 22 In addition, we investigated this novel topology for A-RoF transport employing direct modulation 23 and its optimization regarding the filtering profile of the arrayed waveguide grating (AWG).…”

“…Over the last few years, our group has proposed and investigated a WDM‐PON topology combining self‐seeding and carrier reuse to provide an entirely colorless network where a single wavelength per channel is used for data flow in both directions 18‐21 . We have recently further improved this topology by employing a second RSOA to reinforce the erasure at both ends 22 .…”