title: Frequency stability of a femtosecond optical parametric oscillator frequency comb.
abstract: Carrier-envelope-offset (CEO) and pulse-repetition frequencies of a Ti:sapphire-pumped femtosecond optical parametric oscillator were locked to uncertainties of 0.09 Hz and 0.16 mHz respectively, with the CEO beat signal linewidth being stabilized to 15 Hz (instrument limited). In-loop phase-noise power spectral density measurements showed a contribution of our servo electronics to the comb-line frequency uncertainty of up to 110 Hz. Complementary time-series data implied an in-loop comb instability of 2 x 10(-11) (1-s gate time), matching the Rb-stabilized reference used and verifying that dual servo-control of the CEO and repetition frequencies was effective in stabilizing the comb to at least this precision.
authors: Scottish Universities Physics Alliance (SUPA), Department of Physics, School of Engineering and Physical Sciences, Heriot-Watt University, Riccarton, Edinburgh EH14 4AS, UK. tif2@hw.ac.uk
authors: Teresa I
authors: TI
authors: Ferreiro
authors: Jinghua
authors: J
authors: Sun
authors: Derryck T
authors: DT
authors: Reid
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D005374:Filtration / Q000295:instrumentation*; D053844:Lasers, Solid-State; D008027:Light; D055096:Optical Devices; D009991:Oscillometry / Q000295:instrumentation*; D013685:Telecommunications / Q000295:instrumentation*