Passive Optical Networks

spectra of an FP-LD that was injection-locked by its own reflected light at

different wavelengths (using a tunable FBG), demonstrating colorless operation.

In the self-seeding RSOA scheme proposed in [85], the RSOA at each ONU

emits an ASE spectrum in the upstream direction which is then spectrally sliced

by the AWG in the remote node. A portion of this light is reflected back into the

RSOA via a reflective path comprising a coupler, an optical circulator, and a

band-pass filter (BPF), as shown in the schematic diagram of the proposed

WDM-PON in Fig. 3.53. The BPF ensures that only one wavelength peak is

reflected back to seed the RSOA in the event ...