PMD Tolerance of 10 Gbps Modulated Signals due to SOA-Induced Chirp in SOA Booster Amplifiers

Hodeok Jang, Kyoungsoo Kim, Jaehoon Lee, Jichai Jeong

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


We investigated how the polarization-mode dispersion (PMD) tolerance was degraded by semiconductor optical amplifier (SOA)-induced chirp for the 10 Gb/s nonreturn-to-zero (NRZ), duobinary NRZ, return-to-zero (RZ), and carrier-suppressed RZ (CS-RZ) modulation formats. The power penalty was calculated as a measure of the system performance due to PMD for a given SOA-induced chirp. Considering only first-order PMD, all modulation formats have a similar PMD tolerance regardless of SOA-induced chirp. On the other hand, when both first- and second-order PMD are considered, the PMD tolerance of all modulation formats with the exception of the CS-RZ modulation format are degraded by SOA-induced chirp. Among all modulation formats considered here, the NRZ modulation format has the PMD tolerance with the highest sensitivity to SOA-induced chirp. When the peak-to-peak chirp induced by SOAs is 0.28 A, its PMD tolerance is degraded up to 4 dB for a differential group delay (DGD) of 50 ps. However, the PMD tolerance of the CS-RZ modulation format is largely unaffected by SOA-induced chirp.

Original languageEnglish
Pages (from-to)232-239
Number of pages8
JournalJournal of the Optical Society of Korea
Issue number4
Publication statusPublished - 2008


  • Chirp
  • Modulation format
  • Polarization mode dispersion
  • Semiconductor optical amplifier

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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