Peak-to-average power ratio reduction of carrier-suppressed optical SSB modulation: Performance comparison of three methods

K. I. Amila Sampath, Katsumi Takano, Joji Maeda

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We compare the performances of three previously proposed methods to reduce the peakto- average power ratio (PAPR) of the carrier-suppressed optical single-sideband (OSSB-SC) signal. PAPR of OSSB-SC signal becomes high due to the peaky Hilbert-transformed signal which is used for spectral suppression. Nonlinear phase shifts induced by high PAPR degrade OSSB-SC signal during fiber transmission. Previously, we proposed peak folding, peak clipping, and high-pass Hilbert transform methods to reduce the PAPR of OSSB-SC modulation. In this study, we numerically compare the effectiveness of proposed methods in a 10 Gbit/s non-return-to-zero (NRZ)-coded 100- km single-channel transmission link. Due to the reduced PAPR, peak folding and peak clipping can increase the self-phase modulation (SPM) threshold of the studied system by 2.40 dB and 2.63 dB respectively. The high-pass Hilbert transform method improves the SPM threshold by more than 9 dB.

Original languageEnglish
Article number67
Pages (from-to)1-18
Number of pages18
JournalPhotonics
Volume8
Issue number3
DOIs
Publication statusPublished - Mar 2021
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Radiology Nuclear Medicine and imaging

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