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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 12 — Jun. 6, 2011
  • pp: 11100–11105

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, and Gee-Kung Chang  »View Author Affiliations

Optics Express, Vol. 19, Issue 12, pp. 11100-11105 (2011)

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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.

© 2011 OSA

OCIS Codes
(060.1660) Fiber optics and optical communications : Coherent communications
(060.4510) Fiber optics and optical communications : Optical communications
(060.4264) Fiber optics and optical communications : Networks, wavelength assignment

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: March 22, 2011
Revised Manuscript: May 17, 2011
Manuscript Accepted: May 17, 2011
Published: May 23, 2011

Ze Dong, Jianjun Yu, Hung-Chang Chien, Nan Chi, Lin Chen, and Gee-Kung Chang, "Ultra-dense WDM-PON delivering carrier-centralized Nyquist-WDM uplink with digital coherent detection," Opt. Express 19, 11100-11105 (2011)

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