Abstract:
:Low-noise millimetre-wave signals are valuable for digital sampling systems, arbitrary waveform generation for ultra-wideband communications, and coherent radar systems. However, the phase noise of widely used conventional signal generators (SGs) will increase as the millimetre-wave frequency increases. Our goal has been to improve commercially available SGs so that they provide a low-phase-noise millimetre-wave signal with assistance from an electro-optics-modulator-based optical frequency comb (EOM-OFC). Here, we show that the phase noise can be greatly reduced by bridging the vast frequency difference between the gigahertz and terahertz ranges with an EOM-OFC. The EOM-OFC serves as a liaison that magnifies the phase noise of the SG. With the EOM-OFC used as a phase noise "booster" for a millimetre-wave signal, the phase noise of widely used SGs can be reduced at an arbitrary frequency f (6 ≦ f ≦ 72 GHz).
journal_name
Sci Repjournal_title
Scientific reportsauthors
Ishizawa A,Nishikawa T,Goto T,Hitachi K,Sogawa T,Gotoh Hdoi
10.1038/srep24621subject
Has Abstractpub_date
2016-05-17 00:00:00pages
24621issn
2045-2322pii
srep24621journal_volume
6pub_type
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