Title :
A hybrid 10 GHz photonic-microwave oscillator with sub-femtosecond absolute timing jitter
Author :
Fortier, T.M. ; Nelson, C.W. ; Hati, A. ; Quinlan, F. ; Taylor, J. ; Jiang, H. ; Chou, C.W. ; Lemke, N. ; Ludlow, A. ; Howe, D. ; Oates, C. ; Diddams, S.A.
Author_Institution :
Time & Freq. Div., Nat. Inst. of Stand. & Technol., Boulder, CO, USA
Abstract :
We demonstrate a 10 GHz hybrid oscillator comprised of a phase stabilized optical frequency comb divider and a room temperature dielectric sapphire oscillator. Characterization of the 10 GHz microwave signal via comparison of two independent hybrid oscillators yields a combined phase noise, L(f) = -100 dBc/Hz at a 1 Hz offset and L(f) <; -185 dBc/Hz for frequencies >; 1 MHz. The associated absolute timing jitter is 0.93 fs (1 Hz to Nyquist).
Keywords :
microwave oscillators; microwave photonics; optical frequency conversion; phase noise; sapphire; timing jitter; dielectric sapphire oscillator; frequency 10 GHz; phase noise; phase stabilized optical frequency comb divider; photonic-microwave oscillator; sub-femtosecond absolute timing jitter; temperature 293 K to 298 K; Masers; Microwave filters; Microwave oscillators; Microwave photonics; Phase noise;
Conference_Titel :
Photonics Conference (PHO), 2011 IEEE
Conference_Location :
Arlington, VA
Print_ISBN :
978-1-4244-8940-4
DOI :
10.1109/PHO.2011.6110874
