[10a-S302-1~11] 10.2 Fundamental and exploratory device technologies for spin

[10a-S302-3] Time-resolved measurement of spin precession by asynchronous sampling method using dual comb fiber laser

〇Daichi Nishikawa¹, Makoto Okano¹, Shinichi Watanabe¹ (1.Keio Univ.)

Keywords:spin precession, dual-comb, asynchronous sampling

In this study, we performed pump-probe experiments using a dual-comb fiber laser source consisting of two ultrashort pulsed fiber lasers with slightly different pulse repetition rates as the pump and probe beams, respectively. The dual-comb light source has equally spaced oscillation frequencies, all of which are stabilized to a reference frequency by a rubidium oscillator. Therefore, a time difference between the pump and probe light is automatically generated in the time domain, and the pump-probe experiment can be realized in a non-mechanical manner. Such a method is called the asynchronous sampling method. In this study, we constructed an optical system using the asynchronous sampling method and realized time-resolved measurement of spin precession.