title: 20-Gbps WDM-PON transmissions employing weak-resonant-cavity FPLD with OFDM and SC-FDE modulation formats.
abstract: Using a colorless weak-resonant-cavity (WRC) FPLD injected by a centralized light source, we have experimentally demonstrated a superior performance of 20-Gbps uplink transmission in a WDM-PON. Even though the typical modulation bandwidth of a WRC-FPLD is only ~1.25 GHz, using spectrally-efficient 32-QAM OFDM or SC-FDE modulation, 20-Gbps uplink signals can achieve the FEC limit after 25-km dispersion-uncompensated single-mode fiber transmission. Because of the advantage of lower PAPR, the SC-FDE signals outperform the OFDM signals with the fixed 32-QAM format in the proposed system; moreover, SC-FDE scheme can be another promising candidate for uplinks in WDM-PONs, for its simplification to ONUs. The signal at the mode of 1560.7 nm shows similar quality with the signal at the modes of 1545.3 nm and 1574.7 nm, the WRC-FPLD, accordingly, has wide injection wavelength range from at least 1545.3 nm to 1574.7 nm. With the mode spacing of 0.55 nm, consequently, we have demonstrated the applicability of the colorless WRC-FPLD on supporting up to 36 channels in the WDM-PON.
authors.affiliation: Department of Photonics, National Chiao-Tung University, Hsinchu, Taiwan, 300.
authors.forename: I-Cheng
authors.initials: IC
authors.lastname: Lu
authors.forename: Chia-Chien
authors.initials: CC
authors.lastname: Wei
authors.forename: Wen-Jr
authors.initials: WJ
authors.lastname: Jiang
authors.forename: Hsing-Yu
authors.initials: HY
authors.lastname: Chen
authors.forename: Yu-Chieh
authors.initials: YC
authors.lastname: Chi
authors.forename: Yi-Cheng
authors.initials: YC
authors.lastname: Li
authors.forename: Dar-Zu
authors.initials: DZ
authors.lastname: Hsu
authors.forename: Gong-Ru
authors.initials: GR
authors.lastname: Lin
authors.forename: Jyehong
authors.initials: J
authors.lastname: Chen
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D020349:Surface Plasmon Resonance / Q000295:instrumentation*; D013685:Telecommunications / Q000295:instrumentation*