A femtosecond optical frequency comb (FOFC) based on the Ti: Sapphire femtosecond laser is develo...

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Ti: sapphire Femtosecond Frequency Comb

A femtosecond optical frequency comb (FOFC) based on the Ti: Sapphire femtosecond laser is developed. The FOFC consists of a home-made Ti: Sapphire femtosecond laser, two spectral broadening parts, a single-beam f-2f interferometer and a beat-frequency part. The home-made Ti: Sapphire femtosecond frequency comb could run for overe eight hours. The absolute frequency of the I2-stabilized Nd: YAG 532nm laser and I2-stabilized He-Ne 633nm laser were measured, which were in accordance with the recommended values by CIPM. The developed FOFC in NIM is used for measuring the absolute frequency of the optical clock, generating microwave, and linking the optical frequency of Sr lattice clock to microwave frequency of Cs fountain clock.