An all-optical modulation format conversion for 8QAM based on FWM in HNLF

Banghong Zhang, Hongyu Zhang, Changyuan Yu, Xiaofei Cheng, Yong Kee Yeo, Pooi Kuen Kam, Jing Yang, Hongguang Zhang, Yu Hsiang Wen, Kai Ming Feng

Research output: Journal article publicationJournal articleAcademic researchpeer-review

27 Citations (Scopus)


In this letter, we propose and experimentally demonstrate an all-optical modulation format conversion scheme from amplitude shift keying (ASK) and quadrature phase shift keying (QPSK) to 8-ary quadrature amplitude modulation (8QAM), using four-wave mixing (FWM) effect in highly nonlinear fiber. In the FWM process, a 20-Gbits/s return-to-zero QPSK (RZ-QPSK) signal and a 10-Gbit/s ASK signal are utilized as probe light and pump light, respectively. A 30-Gbits/s RZ-8QAM signal, which is the idler light, is successfully obtained with optical signal-to-noise ratio larger than 30 dB and bit-error rate lower than 10-5.
Original languageEnglish
Article number6395244
Pages (from-to)327-330
Number of pages4
JournalIEEE Photonics Technology Letters
Issue number4
Publication statusPublished - 8 Feb 2013
Externally publishedYes


  • 8-ary quadrature amplitude modulation (8QAM)
  • cross phase modulation (XPM)
  • four-wave mixing (FWM)
  • highly nonlinear fiber (HNLF)

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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