100G Self-Coherent PON Based on Pre-Amplified Stokes Vector Direct Detection

• Published in: IEEE photonics technology letters 2024-11, Vol.36 (22), p.1333-1336
• Main Authors: Fang, Yuhao, Zhu, Haojie, Yuan, Puzhen, Ji, Honglin, Shieh, William
• Format: Article
• Language: English
• Subjects: Budgets; Optical fiber amplifiers; Optical fibers; Optical network units; Optical polarization; Optical pulse shaping; Optical receivers; Optical transmitters; passive optical network (PON); Passive optical networks; SC-PON; self-coherent; semiconductor optical amplifier (SOA); Semiconductor optical amplifiers; Sensitivity; stokes vector direct detection (SVDD); Vectors
• ISSN: 1041-1135; 1941-0174
• DOI: 10.1109/LPT.2024.3470590

In this letter, for the first time, a novel 100G pre-amplified self-coherent passive optical network (SC-PON) architecture is proposed and experimentally verified. To mitigate the reduction in receiver sensitivity resulting from co-transmitted carriers in self-coherent systems, a semiconductor optical amplifier (SOA) was deployed for pre-amplification with a noise figure of 7.5dB and a small-signal gain of 30dB. As a proof-of-concept, a system experiment of pre-amplified 25-GBaud 16-QAM SC-PON is demonstrated in the downstream, achieving a data rate of 100 Gb/s/ \lambda over 20-km single-mode fiber (SMF) with a receiver sensitivity of -22dBm. We achieve a power budget beyond 33.6 dB under the 15% SD-FEC threshold of 2\times 10 ^{-2} , surpassing the power budget specified by ITU-T class N1 and IEEE class PR(X). The results indicate that the proposed SC-PON has the potential applicability for next-generation beyond 100G access systems.