Title :
Low-noise synthesis of microwave signals from an optical source
Author :
McFerran, J.J. ; Ivanov, E.N. ; Bartels, A. ; Wilpers, G. ; Oates, C.W. ; Diddams, S.A. ; Hollberg, L.
Author_Institution :
Time & Frequency Div., Nat. Inst. of Stand. & Technol., Boulder, CO, USA
fDate :
5/26/2005 12:00:00 AM
Abstract :
The low-noise synthesis of a harmonic comb of microwave frequencies using a 1 GHz femtosecond-laser-based synthesiser that is referenced to a cavity-stabilised laser is demonstrated. The residual phase noise is ∼-110 dBc/Hz at 1 Hz offset from the 10 GHz harmonic. Phase noise is measured with an interferometric measurement system having low sensitivity to AM.
Keywords :
frequency synthesizers; laser cavity resonators; microwave photonics; optical pulse generation; phase noise; signal synthesis; 10 GHz; cavity-stabilised laser; femtosecond laser synthesiser; harmonic comb; interferometric measurement system; low-noise synthesis; microwave frequencies; microwave signals; optical source; residual phase noise;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20050505
