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Optical microwave generation and transmission experiments in the 12- and 60-GHz region for wireless communications



IEEE transactions on microwave theory and techniques 46, (1998), No.4, pp.320-30
ISSN: 0018-9480
Journal Article
Fraunhofer HHI ()
data communication; laser mode locking; microwave links; millimetre wave generation; mobile radio; optical fibre communication; semiconductor lasers; optical microwave generation; optical microwave transmission; wireless communication; millimeter-wave radio signal; heterodyning; optical spectral line; mode-locked laser; semiconductor laser; optic/millimeter-wave converter; data transmission; single-channel system; multichannel system; bit-error-rate; monolithically integrated tunable optical-signal source; radio-over-fiber system; 70 mbit/s; 155 mbit/s; 140 mbit/s; 12 GHz; 58 to 70 GHz

Experiments on the optical generation and transmission of millimeter-wave radio signals are reported. The millimeter-wave signals are generated by heterodyning the optical spectral lines of a mode-locked laser (MLL) or of two or more semiconductor lasers at an optic/millimeter-wave converter (OMC). 70-, 140-, and 155-Mb/s data transmission experiments have been carried out successfully in optical single-channel and multichannel systems at radio frequencies of 12 GHz and 58-70 GHz. Bit-error-rate measurements yielded error-free transmission and no error floor was observed. A monolithically integrated tunable optical-signal source was developed and used for generating the millimeter-wave signals. This technology promises a high cost-saving potential for applications in radio-over-fiber systems.