Monolithic 0-f Scheme-Based Frequency Comb Directly Driven by a High-Power Ti:Sapphire Oscillator

A monolithic 0-f scheme-based femtosecond optical frequency comb directly driven by a high-power Ti:sapphire laser oscillator is demonstrated.The spectrum covering from 650 nm to 950 nm is generated from the Ti:sapphire oscillator with a repetition rate of 170MHz.The average output power up to 630mW is delivered under the pump power of 4.5 W.A 44-dB signal-to-noise ratio (SNR) of the carrier-envelope phase offset (CEO) beat note is achieved under the resolution of 100kHz and is long-term stabilized to a reference source at 20MHz.The integrated phase noise (IPN) in the range from 1 Hz to 1 MHz is calculated to be 138mrad,corresponding to the timing jitter of 63 as at the central wavelength of 790 nm.