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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 1 — Jan. 13, 2014
  • pp: 110–118

320 Gb/s Nyquist OTDM received by polarization-insensitive time-domain OFT

H. Hu, D. Kong, E. Palushani, M. Galili, H. C. H. Mulvad, and L. K. Oxenløwe  »View Author Affiliations


Optics Express, Vol. 22, Issue 1, pp. 110-118 (2014)
http://dx.doi.org/10.1364/OE.22.000110


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Abstract

We have demonstrated the generation of a 320 Gb/s Nyquist-OTDM signal by rectangular filtering on an RZ-OTDM signal with the filter bandwidth (320 GHz) equal to the baud rate (320 Gbaud) and the reception of such a Nyquist-OTDM signal using polarization-insensitive time-domain optical Fourier transformation (TD-OFT) followed by passive filtering. After the time-to-frequency mapping in the TD-OFT, the Nyquist-OTDM signal with its characteristic sinc-shaped time-domain trace is converted into an orthogonal frequency division multiplexing (OFDM) signal with sinc-shaped spectra for each subcarrier. The subcarrier frequency spacing of the converted OFDM signal is designed to be larger than the transform-limited case, here 10 times greater than the symbol rate of each subcarrier. Therefore, only passive filtering is needed to extract the subcarriers of the converted OFDM signal. In addition, a polarization diversity scheme is used in the four-wave mixing (FWM) based TD-OFT, and less than 0.5 dB polarization sensitivity is demonstrated in the OTDM receiver.

© 2013 Optical Society of America

OCIS Codes
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.4230) Fiber optics and optical communications : Multiplexing
(070.1170) Fourier optics and signal processing : Analog optical signal processing
(070.4340) Fourier optics and signal processing : Nonlinear optical signal processing

ToC Category:
Subsystems for Optical Networks and Datacomms

History
Original Manuscript: October 9, 2013
Revised Manuscript: November 28, 2013
Manuscript Accepted: December 3, 2013
Published: December 23, 2013

Virtual Issues
European Conference and Exhibition on Optical Communication (2013) Optics Express

Citation
H. Hu, D. Kong, E. Palushani, M. Galili, H. C. H. Mulvad, and L. K. Oxenløwe, "320 Gb/s Nyquist OTDM received by polarization-insensitive time-domain OFT," Opt. Express 22, 110-118 (2014)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-22-1-110


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