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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 26 — Dec. 12, 2011
  • pp: B702–B709

Companding transform based SPM compensation in coherent optical OFDM transmission

Hwan Seok Chung, Sun Hyok Chang, and Kwangjoon Kim  »View Author Affiliations

Optics Express, Vol. 19, Issue 26, pp. B702-B709 (2011)

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We demonstrate a mitigation of fiber nonlinearity based on μ-law companding transform in coherent optical OFDM transmissions. High peak-to-average power ratio (PAPR) increases fiber nonlinear impairments caused by the Kerr effect in optical fiber. The μ-law companding modifies amplitude profile of OFDM signal with time domain signal processing, which reduces high PAPR of OFDM signal. The effects of companding parameter on noise enhancement and PAPR variation are presented. The impacts of companding transform on system performances are evaluated in a single polarization system as well as polarization multiplexed system. The resolution of analog-to-digital converter (ADC), dispersion map of transmission link, and launch power tolerance are also considered. The results of bit-error-rate (BER) measurements show that the μ-law companding improves OSNR margin over 5.5 dB after transmission of 1,040 km over SMF.

© 2011 OSA

OCIS Codes
(060.4080) Fiber optics and optical communications : Modulation
(060.5060) Fiber optics and optical communications : Phase modulation

ToC Category:
Subsystems for Optical Networks

Original Manuscript: September 30, 2011
Revised Manuscript: November 14, 2011
Manuscript Accepted: November 19, 2011
Published: December 5, 2011

Virtual Issues
European Conference on Optical Communication 2011 (2011) Optics Express

Hwan Seok Chung, Sun Hyok Chang, and Kwangjoon Kim, "Companding transform based SPM compensation in coherent optical OFDM transmission," Opt. Express 19, B702-B709 (2011)

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