4-Gb/s Heterodyne Transmission Experiments Using ASK, FSK, and DPSK Modulation

A. H. Gnauck, K. C. Reichmann, J. M. Kahn, S. K. Korotky, J. J. Veselka, T. L. Koch

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


We describe an experimental heterodyne lightwave transmission system operating at 4 Gb/s. Our optical sources were 1.5-μm wavelength DFB and DBR semiconductor lasers. ASK, FSK, and DPSK modulation formats were investigated, and baseline receiver sensitivities of 175, 191, and 209 photons/bit, respectively, were achieved. We also report transmission experiments through up to 160 km of conventional singlemode fiber and up to 175 km of dispersion-shifted fiber.

Original languageEnglish (US)
Pages (from-to)908-910
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number12
StatePublished - Dec 1990

ASJC Scopus subject areas

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


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