4-Gb/s heterodyne transmission experiments using ASK, FSK and DPSK modulation
- 1 December 1990
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 2 (12) , 908-910
- https://doi.org/10.1109/68.62026
Abstract
An experimental heterodyne lightwave transmission system operating at 4 Gb/s is described. The optical sources were 1.5- mu m-wavelength DFB (distributed feedback) and DBR (distributed Bragg reflector) semiconductor lasers. ASK, FSK, and DPSK modulation formats were investigated; baseline receiver sensitivities of 175, 191, and 209 photons/bit, respectively, were achieved. Transmission experiments through up to 160 km of conventional single-mode fiber and up to 175 km of dispersion-shifted fiber are also reported.Keywords
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