Abstract
We demonstrate the implementation of feedforward linearization at 5 GHz, which is the highest operating
frequency yet reported, with 500-MHz linearization bandwidth having at least 24-dB distortion suppression.
Simultaneous reduction of 26-dB third-order intermodulation distortion and 7-dB laser-noise reduction is achieved at
5.2 GHz, leading to enhanced spurious-free dynamic range of 107 dB (1 Hz) in a directly modulated uncooled
semiconductor laser for applications in wireless-over-fiber (WoF) systems. This paper also provides detailed
analysis on feedforward, theoretical distortion reduction, criteria for component selection, and the effect of
dispersion. The effectiveness of feedforward in a multichannel system is demonstrated at 5.8 GHz for fixed wireless
systems, such as WiMAX. These results suggest that the feedforward-linearization arrangement can make practical
multichannel and multioperator WoF systems.
© 2007 IEEE
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription