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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 9 — Apr. 23, 2012
  • pp: 9742–9754

Inserting a cyclic prefix using arrayed-waveguide grating routers in all-optical OFDM transmitters

Arthur James Lowery  »View Author Affiliations


Optics Express, Vol. 20, Issue 9, pp. 9742-9754 (2012)
http://dx.doi.org/10.1364/OE.20.009742


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Abstract

Arrayed-Waveguide Grating Routers (AWGR) can be used as multiplexers and demultiplexers in optical OFDM systems, as they provide both the serial-to-parallel converter and the optical Fourier transform in one component. This paper shows how the design of the AWGR at the transmitter can be modified to insert a cyclic prefix or postfix (CP). We use simulations of a 4-subcarrier system to compare systems without the CP, with a guard-interval, and with a CP. We show that the CP greatly improves the orthogonality of the subcarriers and resilience to timing errors. Furthermore, the CP allows for uncompensated fiber dispersion, especially if the relative timing of the subcarriers upon transmission is adjusted.

© 2012 OSA

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(060.1660) Fiber optics and optical communications : Coherent communications
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.4080) Fiber optics and optical communications : Modulation
(060.4230) Fiber optics and optical communications : Multiplexing
(080.1238) Geometric optics : Array waveguide devices

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: February 21, 2012
Revised Manuscript: April 3, 2012
Manuscript Accepted: April 3, 2012
Published: April 13, 2012

Citation
Arthur James Lowery, "Inserting a cyclic prefix using arrayed-waveguide grating routers in all-optical OFDM transmitters," Opt. Express 20, 9742-9754 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-9-9742


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