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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Vol. 8, Iss. 9 — Sep. 1, 2010
  • pp: 875–880

Phase pre-emphasis for PAPR reduction in optical OFDM systems based on OIDFT or time lens

Jing Shao, Wei Li, and Xiaojun Liang  »View Author Affiliations


Chinese Optics Letters, Vol. 8, Issue 9, pp. 875-880 (2010)


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Abstract

Phase pre-emphasis is theoretically studied and introduced to reduce peak-to-average power ratio (PAPR) in optical orthogonal frequency division multiplexing (OFDM) systems. In intensity modulated (IM) systems, simulations show noticeable PAPR reductions: 4.14 dB (N = 16) and 15.48 dB (N = 512) in time lens-based OFDM, N is the number of subcarriers. An equation is developed to calculate phase values and is proved to be effective. Optical implementing methods are proposed and analyzed. In a time lens-based OFDM system, phase pre-emphasis reduces fiber nonlinearity and results in a 5.2-dB increase of launch power at the bit error rate (BER) of 10?6. Simulations also show similar PAPR reduction and fiber nonlinearity mitigation in optical inverse discrete Fourier transformer (OIDFT) based OFDM systems.

© 2010 Chinese Optics Letters

OCIS Codes
(060.4230) Fiber optics and optical communications : Multiplexing
(060.4510) Fiber optics and optical communications : Optical communications
(190.4370) Nonlinear optics : Nonlinear optics, fibers

Citation
Jing Shao, Wei Li, and Xiaojun Liang, "Phase pre-emphasis for PAPR reduction in optical OFDM systems based on OIDFT or time lens," Chin. Opt. Lett. 8, 875-880 (2010)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-8-9-875

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