Fiber-optic 60-GHz wireless downlink using cross-absorption modulation in an EAM

Chul Soo Park, Y. Guo, Y. K. Yeo, Y. Wang, L. C. Ong, S. Kato

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


We demonstrate the 60-GHz radio-over-fiber downlink adopting the fiber-optic upconversion process. The cross-absorption modulation (XAM) in the multiple-quantum-well electroabsorption modulator (MQW-EAM) is incorporated for the fiber-optic upconversion. Error-free transmission of the 1.25-Gb/s and 622.08-Mb/s pseudorandom bit sequence data is achieved without critical power penalties after the fiber transmission up to 34 km followed by 1-m wireless transmission between the base station and the customer unit. The system performance is dependent on the bias voltage asserted to the MQW-EAM due to the bias-dependent modulation characteristics of XAM and absorption changes. The optimum performance is obtained at the bias of -0.8 V.

Original languageEnglish
Pages (from-to)557-559
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number8
Publication statusPublished - 2008 Apr 15
Externally publishedYes


  • Cross-absorption modulation (XAM)
  • Multiple- quantum-well electroabsorption modulator (MQW-EAM)
  • Photonic upconversion
  • Radio-over-fiber (RoF) system
  • Wireless downlink

ASJC Scopus subject areas

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


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