Excess intensity noise suppressed 100-GHz spectrum-sliced WDM-PON with pre-spectrum-sliced seed light source

Analysis of ASE-Related Impairments on Wavelength-Reuse WDM-PONs Based on Self-Seeded Reflective SOAs

“…We also establish a direct comparison between the more conventional PSSL injection topology [6,7] and our self-seeding scheme [8], in order to highlight their benefits and drawbacks. As an additional note, it should be pointed out that the commercial erasure hardware used in our experiments was specifically designed only to the requirements of the conventional PSSL injection topology [6,7]. Nevertheless, we seek to identify possible performance enhancements provided by our combined scheme, even with nonoptimized hardware.…”

“…However, the link lengths of conventional intensityremodulation approaches [1][2][3][4][5][6][7] are limited to 20 km, even with the support of FFCI, DTC, and PSSL methods. This is due to impairments related to the optical spectral content, arising from narrow-band ASE injection, such as the post-filtering effect (PFE), chromatic dispersion (CD), and ASE-ASE beat noise.…”

“…Combining those techniques, RSOA-based intensityremodulation topologies by means of narrow-band amplified spontaneous emission (ASE) injection have already been widely demonstrated [1][2][3][4][5][6][7]. The intrinsic gain compression of RSOAs is jointly used with electronics carrier erasure techniques such as feed-forward current injection (FFCI) and decision threshold control (DTC) [1][2][3][4][5], as well as prespectrum slicing light (PSSL) injection [6,7], to relax the intensity-remodulation constrains.…”

“…In addition to the use of intensity modulation and colorless transceivers, techniques of wavelength reuse in a loopback configuration [1][2][3][4][5][6][7][8][9] can play a significant role in the design of future high-capacity and cost-effective WDMPONs. This is because the sharing of a single wavelength for both data flows leads to more efficient optical spectra usage, allowing a higher number of available channels when compared to the scenario of distinct wavelengths for upstream and downstream.…”

“…The intrinsic gain compression of RSOAs is jointly used with electronics carrier erasure techniques such as feed-forward current injection (FFCI) and decision threshold control (DTC) [1][2][3][4][5], as well as prespectrum slicing light (PSSL) injection [6,7], to relax the intensity-remodulation constrains.…”