Ultra-dense WDM-PON delivering carrier-centralized Nyquist-WDM uplink with digital coherent detection

Ze Dong; Jianjun Yu; Hung Chang Chien; Nan Chi; Lin Chen; Gee Kung Chang

doi:10.1364/OE.19.011100

Ultra-dense WDM-PON delivering carrier-centralized Nyquist-WDM uplink with digital coherent detection

Ze Dong^*, Jianjun Yu, Hung Chang Chien, Nan Chi, Lin Chen, Gee Kung Chang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

45 Citations (Scopus)

Abstract

We introduce an "ultra-dense" concept into next-generation WDM-PON systems, which transmits a Nyquist-WDM uplink with centralized uplink optical carriers and digital coherent detection for the future access network requiring both high capacity and high spectral efficiency. 80-km standard single mode fiber (SSMF) transmission of Nyquist-WDM signal with 13 coherent 25-GHz spaced wavelength shaped optical carriers individually carrying 100-Gbit/s polarization-multiplexing quadrature phase-shift keying (PM-QPSK) upstream data has been experimentally demonstrated with negligible transmission penalty. The 13 frequency-locked wavelengths with a uniform optical power level of ?10 dBm and OSNR of more than 50 dB are generated from a single lightwave via a multi-carrier generator consists of an optical phase modulator (PM), a Mach-Zehnder modulator (MZM), and a WSS. Following spacing the carriers at the baud rate, sub-carriers are individually spectral shaped to form Nyquist-WDM. The Nyquist-WDM channels have less than 1-dB crosstalk penalty of optical signal-to-noise ratio (OSNR) at 2 × 10^-3 bit-error rate (BER). Performance of a traditional coherent optical OFDM scheme and its restrictions on symbol synchronization and power difference are also experimentally compared and studied.

Original language	English
Pages (from-to)	11100-11105
Number of pages	6
Journal	Optics Express
Volume	19
Issue number	12
DOIs	https://doi.org/10.1364/OE.19.011100
Publication status	Published - 6 Jun 2011
Externally published	Yes

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AU - Chang, Gee Kung

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Ultra-dense WDM-PON delivering carrier-centralized Nyquist-WDM uplink with digital coherent detection

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