Title :
Beat-signal synchronisation for optical generation of millimetre-wave signals
Author :
Hyodo, M. ; Abedin, K.S. ; Onodera, N. ; Watanabe, M.
Author_Institution :
Commun. Res. Lab., Kansai Adv. Res. Center, Japan
Abstract :
High-spectral-purity millimetre-wave beat signals were optically generated at 40 to 120 GHz by heterodyning the outputs from two continuous-wave semiconductor lasers the beat signal of which was harmonically synchronised to an 8 GHz external optical clock. A four-wave-mixing signal generated from the two lasers and the clock was used to achieve the synchronisation. The phase fluctuations of the generated millimetre-wave signals were 0.1 to 0.27 rad.
Keywords :
microwave photonics; millimetre wave generation; multiwave mixing; optical phase locked loops; phase noise; semiconductor optical amplifiers; synchronisation; 40 to 120 GHz; CW lasers; beat-signal synchronisation; continuous-wave semiconductor lasers; external optical clock; four-wave-mixing signal; harmonic synchronisation; harmonically synchronised; high-spectral-purity beat signals; millimetre-wave signals; optical generation; optical phase-locked loops; phase fluctuations; phase-error signal; phase-noise spectrum;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20031167
