Highly spectrally pure 90 GHz signal synthesis using a coupled optoelectronic oscillator
Résumé
A 90 GHz frequency reference is synthesized through harmonic generation from a 30 GHz coupled optoelectronic oscillator. The 30 GHz signal and its third harmonic feature an average power level of −5.6 dBm and −15.8 dBm respectively at the photodiode output. Phase noise measurements at 30 GHz and 90 GHz have been performed and phase noise levels as low as −114.4 dBc/Hz at 1 kHz offset for the fundamental and −104 dBc/Hz at 1 kHz offset frequency for the 90 GHz signal have been obtained.
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